]> git.sesse.net Git - kdenlive/blobdiff - src/customtrackview.cpp
reindent + nice (working) progress bar for document loading
[kdenlive] / src / customtrackview.cpp
index 1904cd76880447d038f29b48a411fc9e03489478..c65d3b91001bf2c4738c96c7d5757bb4ed8e6e2c 100644 (file)
@@ -57,6 +57,7 @@
 #include "groupclipscommand.h"
 #include "splitaudiocommand.h"
 #include "changecliptypecommand.h"
+#include "trackdialog.h"
 
 #include <KDebug>
 #include <KLocale>
 #include <QInputDialog>
 
 
+bool sortGuidesList(const Guide *g1 , const Guide *g2)
+{
+    return (*g1).position() < (*g2).position();
+}
+
+
 //TODO:
 // disable animation if user asked it in KDE's global settings
 // http://lists.kde.org/?l=kde-commits&m=120398724717624&w=2
@@ -98,7 +105,6 @@ CustomTrackView::CustomTrackView(KdenliveDoc *doc, CustomTrackScene* projectscen
         m_animation(NULL),
         m_clickPoint(),
         m_autoScroll(KdenliveSettings::autoscroll()),
-        m_changeSpeedAction(NULL),
         m_pasteEffectsAction(NULL),
         m_ungroupAction(NULL),
         m_scrollOffset(0),
@@ -114,6 +120,12 @@ CustomTrackView::CustomTrackView(KdenliveDoc *doc, CustomTrackScene* projectscen
     else m_commandStack = NULL;
     setMouseTracking(true);
     setAcceptDrops(true);
+    setFrameShape(QFrame::NoFrame);
+    setLineWidth(0);
+    //setCacheMode(QGraphicsView::CacheBackground);
+    //setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
+
+    KdenliveSettings::setTrackheight(m_tracksHeight);
     m_animationTimer = new QTimeLine(800);
     m_animationTimer->setFrameRange(0, 5);
     m_animationTimer->setUpdateInterval(100);
@@ -123,12 +135,18 @@ CustomTrackView::CustomTrackView(KdenliveDoc *doc, CustomTrackScene* projectscen
     m_tipPen.setColor(border);
     m_tipPen.setWidth(3);
     setContentsMargins(0, 0, 0, 0);
-    const int maxWidth = m_tracksHeight * m_document->tracksCount();
-    setSceneRect(0, 0, sceneRect().width(), maxWidth);
-    verticalScrollBar()->setMaximum(maxWidth);
-    m_cursorLine = projectscene->addLine(0, 0, 0, maxWidth);
+    const int maxHeight = m_tracksHeight * m_document->tracksCount();
+    setSceneRect(0, 0, sceneRect().width(), maxHeight);
+    verticalScrollBar()->setMaximum(maxHeight);
+    m_cursorLine = projectscene->addLine(0, 0, 0, maxHeight);
     m_cursorLine->setZValue(1000);
 
+    QPen pen1 = QPen();
+    pen1.setWidth(1);
+    pen1.setColor(Qt::black);
+    m_cursorLine->setPen(pen1);
+    m_cursorLine->setFlag(QGraphicsItem::ItemIgnoresTransformations, true);
+
     KIcon razorIcon("edit-cut");
     m_razorCursor = QCursor(razorIcon.pixmap(22, 22));
 
@@ -140,11 +158,16 @@ CustomTrackView::CustomTrackView(KdenliveDoc *doc, CustomTrackScene* projectscen
     connect(&m_scrollTimer, SIGNAL(timeout()), this, SLOT(slotCheckMouseScrolling()));
     m_scrollTimer.setInterval(100);
     m_scrollTimer.setSingleShot(true);
+
+    connect(&m_thumbsTimer, SIGNAL(timeout()), this, SLOT(slotFetchNextThumbs()));
+    m_thumbsTimer.setInterval(500);
+    m_thumbsTimer.setSingleShot(true);
 }
 
 CustomTrackView::~CustomTrackView()
 {
     qDeleteAll(m_guides);
+    m_waitingThumbs.clear();
 }
 
 void CustomTrackView::setDocumentModified()
@@ -159,8 +182,7 @@ void CustomTrackView::setContextMenu(QMenu *timeline, QMenu *clip, QMenu *transi
     m_clipTypeGroup = clipTypeGroup;
     QList <QAction *> list = m_timelineContextClipMenu->actions();
     for (int i = 0; i < list.count(); i++) {
-        if (list.at(i)->data().toString() == "change_speed") m_changeSpeedAction = list.at(i);
-        else if (list.at(i)->data().toString() == "paste_effects") m_pasteEffectsAction = list.at(i);
+        if (list.at(i)->data().toString() == "paste_effects") m_pasteEffectsAction = list.at(i);
         else if (list.at(i)->data().toString() == "ungroup_clip") m_ungroupAction = list.at(i);
     }
 
@@ -207,7 +229,7 @@ void CustomTrackView::checkTrackHeight()
             item = (ClipItem*) itemList.at(i);
             item->setRect(0, 0, item->rect().width(), m_tracksHeight - 1);
             item->setPos((qreal) item->startPos().frames(m_document->fps()), (qreal) item->track() * m_tracksHeight + 1);
-            item->resetThumbs();
+            item->resetThumbs(true);
         } else if (itemList.at(i)->type() == TRANSITIONWIDGET) {
             transitionitem = (Transition*) itemList.at(i);
             transitionitem->setRect(0, 0, transitionitem->rect().width(), m_tracksHeight / 3 * 2 - 1);
@@ -225,7 +247,7 @@ void CustomTrackView::checkTrackHeight()
     setSceneRect(0, 0, sceneRect().width(), m_tracksHeight * m_document->tracksCount());
 //     verticalScrollBar()->setMaximum(m_tracksHeight * m_document->tracksCount());
     KdenliveSettings::setSnaptopoints(snap);
-    update();
+    viewport()->update();
 }
 
 /** Zoom or move viewport on mousewheel
@@ -258,6 +280,18 @@ int CustomTrackView::getPreviousVideoTrack(int track)
 }
 
 
+void CustomTrackView::slotFetchNextThumbs()
+{
+    if (!m_waitingThumbs.isEmpty()) {
+        ClipItem *item = m_waitingThumbs.takeFirst();
+        while ((item == NULL) && !m_waitingThumbs.isEmpty()) {
+            item = m_waitingThumbs.takeFirst();
+        }
+        if (item) item->slotFetchThumbs();
+        if (!m_waitingThumbs.isEmpty()) m_thumbsTimer.start();
+    }
+}
+
 void CustomTrackView::slotCheckMouseScrolling()
 {
     if (m_scrollOffset == 0) {
@@ -290,12 +324,14 @@ void CustomTrackView::mouseMoveEvent(QMouseEvent * event)
 {
     int pos = event->x();
     int mappedXPos = (int)(mapToScene(event->pos()).x() + 0.5);
+    double snappedPos = getSnapPointForPos(mappedXPos);
     emit mousePosition(mappedXPos);
 
     if (event->buttons() & Qt::MidButton) return;
-    if (m_operationMode == RUBBERSELECTION || (event->modifiers() == Qt::ControlModifier && m_tool != SPACERTOOL)) {
-        QGraphicsView::mouseMoveEvent(event);
+    if (dragMode() == QGraphicsView::RubberBandDrag || (event->modifiers() == Qt::ControlModifier && m_tool != SPACERTOOL)) {
+        event->setAccepted(true);
         m_moveOpMode = NONE;
+        QGraphicsView::mouseMoveEvent(event);
         return;
     }
 
@@ -314,11 +350,9 @@ void CustomTrackView::mouseMoveEvent(QMouseEvent * event)
                 } else if (m_scrollTimer.isActive()) m_scrollTimer.stop();
 
             } else if (m_operationMode == RESIZESTART && move) {
-                double snappedPos = getSnapPointForPos(mappedXPos);
                 m_document->renderer()->pause();
                 m_dragItem->resizeStart((int)(snappedPos));
             } else if (m_operationMode == RESIZEEND && move) {
-                double snappedPos = getSnapPointForPos(mappedXPos);
                 m_document->renderer()->pause();
                 m_dragItem->resizeEnd((int)(snappedPos));
             } else if (m_operationMode == FADEIN && move) {
@@ -333,23 +367,60 @@ void CustomTrackView::mouseMoveEvent(QMouseEvent * event)
                 pos = (br.bottom() - pos) * maxh;
                 m_dragItem->updateKeyFramePos(keyFramePos, pos);
             }
-
+            if (m_visualTip) scene()->removeItem(m_visualTip);
+            m_animationTimer->stop();
             delete m_animation;
             m_animation = NULL;
             delete m_visualTip;
             m_visualTip = NULL;
             return;
         } else if (m_operationMode == MOVEGUIDE) {
+            if (m_visualTip) scene()->removeItem(m_visualTip);
+            m_animationTimer->stop();
             delete m_animation;
             m_animation = NULL;
             delete m_visualTip;
             m_visualTip = NULL;
             QGraphicsView::mouseMoveEvent(event);
             return;
-        } else if (m_operationMode == SPACER && move) {
+        } else if (m_operationMode == SPACER && move && m_selectionGroup) {
             // spacer tool
             int mappedClick = (int)(mapToScene(m_clickEvent).x() + 0.5);
-            m_selectionGroup->setPos(mappedXPos + (((int) m_selectionGroup->boundingRect().topLeft().x() + 0.5) - mappedClick) , m_selectionGroup->pos().y());
+            if (snappedPos < 0) snappedPos = 0;
+            // Make sure there is no collision
+            QList<QGraphicsItem *> children = m_selectionGroup->childItems();
+            QPainterPath shape = m_selectionGroup->clipGroupShape(QPointF(snappedPos - m_selectionGroup->sceneBoundingRect().left(), 0));
+            QList<QGraphicsItem*> collidingItems = scene()->items(shape, Qt::IntersectsItemShape);
+            collidingItems.removeAll(m_selectionGroup);
+            for (int i = 0; i < children.count(); i++) {
+                collidingItems.removeAll(children.at(i));
+            }
+            bool collision = false;
+            for (int i = 0; i < collidingItems.count(); i++) {
+                if (collidingItems.at(i)->type() == AVWIDGET) {
+                    collision = true;
+                    break;
+                }
+            }
+            if (!collision) {
+                // Check transitions
+                shape = m_selectionGroup->transitionGroupShape(QPointF(snappedPos - m_selectionGroup->sceneBoundingRect().left(), 0));
+                collidingItems = scene()->items(shape, Qt::IntersectsItemShape);
+                collidingItems.removeAll(m_selectionGroup);
+                for (int i = 0; i < children.count(); i++) {
+                    collidingItems.removeAll(children.at(i));
+                }
+                for (int i = 0; i < collidingItems.count(); i++) {
+                    if (collidingItems.at(i)->type() == TRANSITIONWIDGET) {
+                        collision = true;
+                        break;
+                    }
+                }
+            }
+
+            if (!collision)
+                m_selectionGroup->translate(snappedPos - m_selectionGroup->sceneBoundingRect().left(), 0);
+            //m_selectionGroup->setPos(mappedXPos + (((int) m_selectionGroup->boundingRect().topLeft().x() + 0.5) - mappedClick) , m_selectionGroup->pos().y());
         }
     }
 
@@ -379,23 +450,24 @@ void CustomTrackView::mouseMoveEvent(QMouseEvent * event)
         AbstractClipItem *clip = static_cast <AbstractClipItem*>(item);
         if (m_tool == RAZORTOOL) {
             // razor tool over a clip, display current frame in monitor
-            if (!m_blockRefresh && item->type() == AVWIDGET) {
+            if (false && !m_blockRefresh && item->type() == AVWIDGET) {
                 //TODO: solve crash when showing frame when moving razor over clip
-                //emit showClipFrame(((ClipItem *) item)->baseClip(), mapToScene(event->pos()).x() / m_scale - (clip->startPos() - clip->cropStart()).frames(m_document->fps()));
+                emit showClipFrame(((ClipItem *) item)->baseClip(), mappedXPos - (clip->startPos() - clip->cropStart()).frames(m_document->fps()));
             }
             event->accept();
             return;
         }
         opMode = clip->operationMode(mapToScene(event->pos()));
-        double size = 5;
+        const double size = 5;
         if (opMode == m_moveOpMode) {
             QGraphicsView::mouseMoveEvent(event);
             return;
         } else {
             if (m_visualTip) {
+                scene()->removeItem(m_visualTip);
+                m_animationTimer->stop();
                 delete m_animation;
                 m_animation = NULL;
-                m_animationTimer->stop();
                 delete m_visualTip;
                 m_visualTip = NULL;
             }
@@ -408,26 +480,22 @@ void CustomTrackView::mouseMoveEvent(QMouseEvent * event)
             if (m_visualTip == NULL) {
                 QRectF rect = clip->sceneBoundingRect();
                 QPolygon polygon;
-                polygon << QPoint(0, rect.height() / 2 - size * 2);
-                polygon << QPoint(size * 2, (int)(rect.height() / 2));
-                polygon << QPoint(0, (int)(rect.height() / 2 + size * 2));
-                polygon << QPoint(0, (int)(rect.height() / 2 - size * 2));
+                polygon << QPoint(0, - size * 2);
+                polygon << QPoint(size * 2, 0);
+                polygon << QPoint(0, size * 2);
+                polygon << QPoint(0, - size * 2);
 
                 m_visualTip = new QGraphicsPolygonItem(polygon);
                 ((QGraphicsPolygonItem*) m_visualTip)->setBrush(m_tipColor);
                 ((QGraphicsPolygonItem*) m_visualTip)->setPen(m_tipPen);
-                m_visualTip->setPos(rect.x(), rect.y());
+                m_visualTip->setPos(rect.x(), rect.y() + rect.height() / 2);
                 m_visualTip->setFlags(QGraphicsItem::ItemIgnoresTransformations);
                 m_visualTip->setZValue(100);
                 m_animation = new QGraphicsItemAnimation;
                 m_animation->setItem(m_visualTip);
                 m_animation->setTimeLine(m_animationTimer);
-                double scale = 2.0;
-                m_animation->setScaleAt(.5, scale, 1);
-                //m_animation->setPosAt(.5, QPointF(rect.x() - rect.x() * scale, 0));
-                scale = 1.0;
-                m_animation->setScaleAt(1, scale, 1);
-                //m_animation->setPosAt(1, QPointF(rect.x() - rect.x() * scale, 0));
+                m_animation->setScaleAt(.5, 2, 1);
+                m_animation->setScaleAt(1, 1, 1);
                 scene()->addItem(m_visualTip);
                 m_animationTimer->start();
             }
@@ -436,24 +504,22 @@ void CustomTrackView::mouseMoveEvent(QMouseEvent * event)
             if (m_visualTip == NULL) {
                 QRectF rect = clip->sceneBoundingRect();
                 QPolygon polygon;
-                polygon << QPoint(0, (int)(rect.height() / 2 - size * 2));
-                polygon << QPoint(- size * 2, (int)(rect.height() / 2));
-                polygon << QPoint(0, (int)(rect.height() / 2 + size * 2));
-                polygon << QPoint(0, (int)(rect.height() / 2 - size * 2));
+                polygon << QPoint(0, - size * 2);
+                polygon << QPoint(- size * 2, 0);
+                polygon << QPoint(0, size * 2);
+                polygon << QPoint(0, - size * 2);
 
                 m_visualTip = new QGraphicsPolygonItem(polygon);
                 ((QGraphicsPolygonItem*) m_visualTip)->setBrush(m_tipColor);
                 ((QGraphicsPolygonItem*) m_visualTip)->setPen(m_tipPen);
                 m_visualTip->setFlags(QGraphicsItem::ItemIgnoresTransformations);
-                m_visualTip->setPos(rect.right(), rect.y());
+                m_visualTip->setPos(rect.right(), rect.y() + rect.height() / 2);
                 m_visualTip->setZValue(100);
                 m_animation = new QGraphicsItemAnimation;
                 m_animation->setItem(m_visualTip);
                 m_animation->setTimeLine(m_animationTimer);
-                double scale = 2.0;
-                m_animation->setScaleAt(.5, scale, 1);
-                scale = 1.0;
-                m_animation->setScaleAt(1, scale, 1);
+                m_animation->setScaleAt(.5, 2, 1);
+                m_animation->setScaleAt(1, 1, 1);
                 scene()->addItem(m_visualTip);
                 m_animationTimer->start();
             }
@@ -470,10 +536,8 @@ void CustomTrackView::mouseMoveEvent(QMouseEvent * event)
                 m_animation = new QGraphicsItemAnimation;
                 m_animation->setItem(m_visualTip);
                 m_animation->setTimeLine(m_animationTimer);
-                double scale = 2.0;
-                m_animation->setScaleAt(.5, scale, scale);
-                scale = 1.0;
-                m_animation->setScaleAt(1, scale, scale);
+                m_animation->setScaleAt(.5, 2, 2);
+                m_animation->setScaleAt(1, 1, 1);
                 scene()->addItem(m_visualTip);
                 m_animationTimer->start();
             }
@@ -491,51 +555,59 @@ void CustomTrackView::mouseMoveEvent(QMouseEvent * event)
                 m_animation = new QGraphicsItemAnimation;
                 m_animation->setItem(m_visualTip);
                 m_animation->setTimeLine(m_animationTimer);
-                double scale = 2.0;
-                m_animation->setScaleAt(.5, scale, scale);
-                scale = 1.0;
-                m_animation->setScaleAt(1, scale, scale);
+                m_animation->setScaleAt(.5, 2, 2);
+                m_animation->setScaleAt(1, 1, 1);
                 scene()->addItem(m_visualTip);
                 m_animationTimer->start();
             }
             setCursor(Qt::PointingHandCursor);
         } else if (opMode == TRANSITIONSTART) {
-            /*if (m_visualTip == NULL) {
+            if (m_visualTip == NULL) {
                 QRectF rect = clip->sceneBoundingRect();
-                m_visualTip = new QGraphicsEllipseItem(-5, -5 , 10, 10);
-                ((QGraphicsEllipseItem*) m_visualTip)->setBrush(m_tipColor);
-                ((QGraphicsEllipseItem*) m_visualTip)->setPen(m_tipPen);
+                QPolygon polygon;
+                polygon << QPoint(0, - size * 2);
+                polygon << QPoint(size * 2, 0);
+                polygon << QPoint(0, 0);
+                polygon << QPoint(0, - size * 2);
+
+                m_visualTip = new QGraphicsPolygonItem(polygon);
+                ((QGraphicsPolygonItem*) m_visualTip)->setBrush(m_tipColor);
+                ((QGraphicsPolygonItem*) m_visualTip)->setPen(m_tipPen);
+                m_visualTip->setPos(rect.x(), rect.bottom());
+                m_visualTip->setFlags(QGraphicsItem::ItemIgnoresTransformations);
                 m_visualTip->setZValue(100);
                 m_animation = new QGraphicsItemAnimation;
                 m_animation->setItem(m_visualTip);
                 m_animation->setTimeLine(m_animationTimer);
-                m_visualTip->setPos(rect.x() + 10, rect.y() + rect.height() / 2 + 12);
-                double scale = 2.0;
-                m_animation->setScaleAt(.5, scale, scale);
-                scale = 1.0;
-                m_animation->setScaleAt(1, scale, scale);
+                m_animation->setScaleAt(.5, 2, 2);
+                m_animation->setScaleAt(1, 1, 1);
                 scene()->addItem(m_visualTip);
                 m_animationTimer->start();
-            }*/
+            }
             setCursor(Qt::PointingHandCursor);
         } else if (opMode == TRANSITIONEND) {
-            /*if (m_visualTip == NULL) {
+            if (m_visualTip == NULL) {
                 QRectF rect = clip->sceneBoundingRect();
-                m_visualTip = new QGraphicsEllipseItem(-5, -5 , 10, 10);
-                ((QGraphicsEllipseItem*) m_visualTip)->setBrush(m_tipColor);
-                ((QGraphicsEllipseItem*) m_visualTip)->setPen(m_tipPen);
+                QPolygon polygon;
+                polygon << QPoint(0, - size * 2);
+                polygon << QPoint(- size * 2, 0);
+                polygon << QPoint(0, 0);
+                polygon << QPoint(0, - size * 2);
+
+                m_visualTip = new QGraphicsPolygonItem(polygon);
+                ((QGraphicsPolygonItem*) m_visualTip)->setBrush(m_tipColor);
+                ((QGraphicsPolygonItem*) m_visualTip)->setPen(m_tipPen);
+                m_visualTip->setPos(rect.right(), rect.bottom());
+                m_visualTip->setFlags(QGraphicsItem::ItemIgnoresTransformations);
                 m_visualTip->setZValue(100);
                 m_animation = new QGraphicsItemAnimation;
                 m_animation->setItem(m_visualTip);
                 m_animation->setTimeLine(m_animationTimer);
-                m_visualTip->setPos(rect.x() + rect.width() - 10 , rect.y() + rect.height() / 2 + 12);
-                double scale = 2.0;
-                m_animation->setScaleAt(.5, scale, scale);
-                scale = 1.0;
-                m_animation->setScaleAt(1, scale, scale);
+                m_animation->setScaleAt(.5, 2, 2);
+                m_animation->setScaleAt(1, 1, 1);
                 scene()->addItem(m_visualTip);
                 m_animationTimer->start();
-            }*/
+            }
             setCursor(Qt::PointingHandCursor);
         } else if (opMode == KEYFRAME) {
             setCursor(Qt::PointingHandCursor);
@@ -549,8 +621,9 @@ void CustomTrackView::mouseMoveEvent(QMouseEvent * event)
         setCursor(Qt::SplitHCursor);
     } else {
         if (m_visualTip) {
-            delete m_animation;
+            scene()->removeItem(m_visualTip);
             m_animationTimer->stop();
+            delete m_animation;
             m_animation = NULL;
             delete m_visualTip;
             m_visualTip = NULL;
@@ -571,7 +644,6 @@ void CustomTrackView::mouseMoveEvent(QMouseEvent * event)
 // virtual
 void CustomTrackView::mousePressEvent(QMouseEvent * event)
 {
-    kDebug() << "mousePressEvent STARTED";
     setFocus(Qt::MouseFocusReason);
     m_menuPosition = QPoint();
 
@@ -583,8 +655,21 @@ void CustomTrackView::mousePressEvent(QMouseEvent * event)
         return;
     }
 
+    if (event->modifiers() & Qt::ShiftModifier) {
+        // Rectangle selection
+        setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
+        setDragMode(QGraphicsView::RubberBandDrag);
+        if (!(event->modifiers() & Qt::ControlModifier)) {
+            resetSelectionGroup();
+            scene()->clearSelection();
+        }
+        m_blockRefresh = false;
+        m_operationMode = RUBBERSELECTION;
+        QGraphicsView::mousePressEvent(event);
+        return;
+    }
+
     m_blockRefresh = true;
-    m_dragItem = NULL;
     m_dragGuide = NULL;
     bool collision = false;
 
@@ -599,6 +684,7 @@ void CustomTrackView::mousePressEvent(QMouseEvent * event)
     QList<QGraphicsItem *> collisionList = items(m_clickEvent);
 
     if (event->modifiers() == Qt::ControlModifier && m_tool != SPACERTOOL && collisionList.count() == 0) {
+        // Pressing Ctrl + left mouse button in an empty area scrolls the timeline
         setDragMode(QGraphicsView::ScrollHandDrag);
         QGraphicsView::mousePressEvent(event);
         m_blockRefresh = false;
@@ -606,18 +692,6 @@ void CustomTrackView::mousePressEvent(QMouseEvent * event)
         return;
     }
 
-    if (event->modifiers() & Qt::ShiftModifier && collisionList.count() == 0) {
-        setDragMode(QGraphicsView::RubberBandDrag);
-        if (!(event->modifiers() & Qt::ControlModifier)) {
-            resetSelectionGroup();
-            scene()->clearSelection();
-        }
-        QGraphicsView::mousePressEvent(event);
-        m_blockRefresh = false;
-        m_operationMode = RUBBERSELECTION;
-        return;
-    }
-
     // if a guide and a clip were pressed, just select the guide
     for (int i = 0; i < collisionList.count(); ++i) {
         if (collisionList.at(i)->type() == GUIDEITEM) {
@@ -641,9 +715,15 @@ void CustomTrackView::mousePressEvent(QMouseEvent * event)
     // Find first clip, transition or group under mouse (when no guides selected)
     int ct = 0;
     AbstractGroupItem *dragGroup = NULL;
+    AbstractClipItem *collisionClip = NULL;
+    bool found = false;
     while (!m_dragGuide && ct < collisionList.count()) {
         if (collisionList.at(ct)->type() == AVWIDGET || collisionList.at(ct)->type() == TRANSITIONWIDGET) {
-            m_dragItem = static_cast <AbstractClipItem *>(collisionList.at(ct));
+            collisionClip = static_cast <AbstractClipItem *>(collisionList.at(ct));
+            if (collisionClip == m_dragItem) {
+                collisionClip = NULL;
+            } else m_dragItem = collisionClip;
+            found = true;
             m_dragItemInfo = m_dragItem->info();
             if (m_dragItem->parentItem() && m_dragItem->parentItem()->type() == GROUPWIDGET && m_dragItem->parentItem() != m_selectionGroup) {
                 // kDebug()<<"// KLIK FOUND GRP: "<<m_dragItem->sceneBoundingRect();
@@ -653,6 +733,10 @@ void CustomTrackView::mousePressEvent(QMouseEvent * event)
         }
         ct++;
     }
+    if (!found) {
+        if (m_dragItem) emit clipItemSelected(NULL);
+        m_dragItem = NULL;
+    }
 
     if (m_dragItem && m_dragItem->type() == TRANSITIONWIDGET) {
         // update transition menu action
@@ -696,18 +780,25 @@ void CustomTrackView::mousePressEvent(QMouseEvent * event)
 
     // No item under click
     if (m_dragItem == NULL || m_tool == SPACERTOOL) {
-        resetSelectionGroup();
+        resetSelectionGroup(false);
         setCursor(Qt::ArrowCursor);
         m_scene->clearSelection();
         //event->accept();
-        emit clipItemSelected(NULL);
         updateClipTypeActions(NULL);
         if (m_tool == SPACERTOOL) {
             QList<QGraphicsItem *> selection;
             if (event->modifiers() == Qt::ControlModifier) {
                 // Ctrl + click, select all items on track after click position
                 int track = (int)(mapToScene(m_clickEvent).y() / m_tracksHeight);
-                selection = items(m_clickEvent.x(), track * m_tracksHeight + m_tracksHeight / 2, mapFromScene(sceneRect().width(), 0).x() - m_clickEvent.x(), m_tracksHeight / 2 - 2);
+                QRectF rect(mapToScene(m_clickEvent).x(), track * m_tracksHeight + m_tracksHeight / 2, sceneRect().width() - mapToScene(m_clickEvent).x(), m_tracksHeight / 2 - 2);
+
+                bool isOk;
+                selection = checkForGroups(rect, isOk);
+                if (!isOk) {
+                    // groups found on track, do not allow the move
+                    emit displayMessage(i18n("Cannot use spacer in a track with a group"), ErrorMessage);
+                    return;
+                }
 
                 kDebug() << "SPACER TOOL + CTRL, SELECTING ALL CLIPS ON TRACK " << track << " WITH SELECTION RECT " << m_clickEvent.x() << "/" <<  track * m_tracksHeight + 1 << "; " << mapFromScene(sceneRect().width(), 0).x() - m_clickEvent.x() << "/" << m_tracksHeight - 2;
             } else {
@@ -716,19 +807,49 @@ void CustomTrackView::mousePressEvent(QMouseEvent * event)
                 kDebug() << "SELELCTING ELEMENTS WITHIN =" << event->pos().x() << "/" <<  1 << ", " << mapFromScene(sceneRect().width(), 0).x() - event->pos().x() << "/" << sceneRect().height();
             }
 
-            resetSelectionGroup(false);
-            m_scene->clearSelection();
-
+            // create group to hold selected items
+            m_selectionGroup = new AbstractGroupItem(m_document->fps());
+            scene()->addItem(m_selectionGroup);
+            QList <GenTime> offsetList;
             for (int i = 0; i < selection.count(); i++) {
-                if (selection.at(i)->type() == AVWIDGET || selection.at(i)->type() == TRANSITIONWIDGET || selection.at(i)->type() == GROUPWIDGET) {
-                    selection.at(i)->setSelected(true);
+                if (selection.at(i)->parentItem() == 0 && (selection.at(i)->type() == AVWIDGET || selection.at(i)->type() == TRANSITIONWIDGET)) {
+                    AbstractClipItem *item = static_cast<AbstractClipItem *>(selection.at(i));
+                    offsetList.append(item->startPos());
+                    offsetList.append(item->endPos());
+                    m_selectionGroup->addToGroup(selection.at(i));
+                    selection.at(i)->setFlags(QGraphicsItem::ItemIsSelectable);
+                } else if (selection.at(i)->parentItem() == 0 && selection.at(i)->type() == GROUPWIDGET) {
+                    QList<QGraphicsItem *> children = selection.at(i)->childItems();
+                    for (int j = 0; j < children.count(); j++) {
+                        AbstractClipItem *item = static_cast<AbstractClipItem *>(children.at(j));
+                        offsetList.append(item->startPos());
+                        offsetList.append(item->endPos());
+                    }
+                    m_selectionGroup->addToGroup(selection.at(i));
+                    selection.at(i)->setFlags(QGraphicsItem::ItemIsSelectable);
+                } else if (selection.at(i)->parentItem()) {
+                    m_selectionGroup->addToGroup(selection.at(i)->parentItem());
+                    selection.at(i)->parentItem()->setFlags(QGraphicsItem::ItemIsSelectable);
                 }
             }
-            groupSelectedItems(true);
+
+            if (!offsetList.isEmpty()) {
+                qSort(offsetList);
+                QList <GenTime> cleandOffsetList;
+                GenTime startOffset = offsetList.takeFirst();
+                for (int k = 0; k < offsetList.size(); k++) {
+                    GenTime newoffset = offsetList.at(k) - startOffset;
+                    if (newoffset != GenTime() && !cleandOffsetList.contains(newoffset)) {
+                        cleandOffsetList.append(newoffset);
+                    }
+                }
+                updateSnapPoints(NULL, cleandOffsetList, true);
+            }
             m_operationMode = SPACER;
-        } else setCursorPos((int)(mapToScene(event->x(), 0).x()));
+        } else {
+            setCursorPos((int)(mapToScene(event->x(), 0).x()));
+        }
         QGraphicsView::mousePressEvent(event);
-        kDebug() << "END mousePress EVENT ";
         return;
     }
 
@@ -749,47 +870,24 @@ void CustomTrackView::mousePressEvent(QMouseEvent * event)
         RazorClipCommand* command = new RazorClipCommand(this, clip->info(), GenTime((int)(mapToScene(event->pos()).x()), m_document->fps()));
         m_document->renderer()->pause();
         m_commandStack->push(command);
-        m_document->setModified(true);
+        setDocumentModified();
         m_dragItem = NULL;
         event->accept();
         return;
     }
 
-    if (dragGroup == NULL) updateSnapPoints(m_dragItem);
-    else {
-        QList <GenTime> offsetList;
-        QList<QGraphicsItem *> children = dragGroup->childItems();
-        for (int i = 0; i < children.count(); i++) {
-            if (children.at(i)->type() == AVWIDGET || children.at(i)->type() == TRANSITIONWIDGET) {
-                AbstractClipItem *item = static_cast <AbstractClipItem *>(children.at(i));
-                offsetList.append(item->startPos());
-                offsetList.append(item->endPos());
-            }
-        }
-        if (!offsetList.isEmpty()) {
-            qSort(offsetList);
-            GenTime startOffset = offsetList.takeFirst();
-            QList <GenTime> cleandOffsetList;
-            for (int k = 0; k < offsetList.size(); k++) {
-                GenTime newoffset = offsetList.at(k) - startOffset;
-                if (newoffset != GenTime() && !cleandOffsetList.contains(newoffset)) {
-                    cleandOffsetList.append(newoffset);
-                }
-            }
-            updateSnapPoints(NULL, cleandOffsetList, true);
-        }
-    }
-
-    if (m_dragItem->type() == AVWIDGET && !m_dragItem->isItemLocked()) emit clipItemSelected((ClipItem*) m_dragItem);
-    else emit clipItemSelected(NULL);
-
     bool itemSelected = false;
     if (m_dragItem->isSelected()) itemSelected = true;
     else if (m_dragItem->parentItem() && m_dragItem->parentItem()->isSelected()) itemSelected = true;
     else if (dragGroup && dragGroup->isSelected()) itemSelected = true;
+
     if (event->modifiers() == Qt::ControlModifier || itemSelected == false) {
-        resetSelectionGroup();
-        if (event->modifiers() != Qt::ControlModifier) m_scene->clearSelection();
+        if (event->modifiers() != Qt::ControlModifier) {
+            resetSelectionGroup(false);
+            m_scene->clearSelection();
+            // A refresh seems necessary otherwise in zoomed mode, some clips disappear
+            viewport()->update();
+        } else resetSelectionGroup();
         dragGroup = NULL;
         if (m_dragItem->parentItem() && m_dragItem->parentItem()->type() == GROUPWIDGET) {
             //kDebug()<<"// KLIK FOUND GRP: "<<m_dragItem->sceneBoundingRect();
@@ -802,16 +900,50 @@ void CustomTrackView::mousePressEvent(QMouseEvent * event)
         groupSelectedItems();
         ClipItem *clip = static_cast <ClipItem *>(m_dragItem);
         updateClipTypeActions(dragGroup == NULL ? clip : NULL);
-        m_changeSpeedAction->setEnabled(clip->clipType() == AV || clip->clipType() == VIDEO);
         m_pasteEffectsAction->setEnabled(m_copiedItems.count() == 1);
     }
 
+    if (collisionClip != NULL || m_dragItem == NULL) {
+        if (m_dragItem && m_dragItem->type() == AVWIDGET && !m_dragItem->isItemLocked()) {
+            ClipItem *selected = static_cast <ClipItem*>(m_dragItem);
+            emit clipItemSelected(selected);
+        } else emit clipItemSelected(NULL);
+    }
+
     // If clicked item is selected, allow move
-    if (event->modifiers() != Qt::ControlModifier && m_operationMode == NONE/* && (m_dragItem->isSelected() || (dragGroup && dragGroup->isSelected()))*/) QGraphicsView::mousePressEvent(event);
+    if (event->modifiers() != Qt::ControlModifier && m_operationMode == NONE) QGraphicsView::mousePressEvent(event);
 
     m_clickPoint = QPoint((int)(mapToScene(event->pos()).x() - m_dragItem->startPos().frames(m_document->fps())), (int)(event->pos().y() - m_dragItem->pos().y()));
     m_operationMode = m_dragItem->operationMode(mapToScene(event->pos()));
 
+    // Update snap points
+    if (m_selectionGroup == NULL) {
+        if (m_operationMode == RESIZEEND || m_operationMode == RESIZESTART) updateSnapPoints(NULL);
+        else updateSnapPoints(m_dragItem);
+    } else {
+        QList <GenTime> offsetList;
+        QList<QGraphicsItem *> children = m_selectionGroup->childItems();
+        for (int i = 0; i < children.count(); i++) {
+            if (children.at(i)->type() == AVWIDGET || children.at(i)->type() == TRANSITIONWIDGET) {
+                AbstractClipItem *item = static_cast <AbstractClipItem *>(children.at(i));
+                offsetList.append(item->startPos());
+                offsetList.append(item->endPos());
+            }
+        }
+        if (!offsetList.isEmpty()) {
+            qSort(offsetList);
+            GenTime startOffset = offsetList.takeFirst();
+            QList <GenTime> cleandOffsetList;
+            for (int k = 0; k < offsetList.size(); k++) {
+                GenTime newoffset = offsetList.at(k) - startOffset;
+                if (newoffset != GenTime() && !cleandOffsetList.contains(newoffset)) {
+                    cleandOffsetList.append(newoffset);
+                }
+            }
+            updateSnapPoints(NULL, cleandOffsetList, true);
+        }
+    }
+
     if (m_operationMode == KEYFRAME) {
         m_dragItem->updateSelectedKeyFrame();
         m_blockRefresh = false;
@@ -881,7 +1013,7 @@ void CustomTrackView::mousePressEvent(QMouseEvent * event)
 
     m_blockRefresh = false;
     //kDebug()<<pos;
-    //QGraphicsView::mousePressEvent(event);
+    QGraphicsView::mousePressEvent(event);
 }
 
 void CustomTrackView::resetSelectionGroup(bool selectItems)
@@ -894,7 +1026,7 @@ void CustomTrackView::resetSelectionGroup(bool selectItems)
         QList<QGraphicsItem *> children = m_selectionGroup->childItems();
         scene()->destroyItemGroup(m_selectionGroup);
         for (int i = 0; i < children.count(); i++) {
-            if (children.at(i)->type() == AVWIDGET || children.at(i)->type() == TRANSITIONWIDGET) {
+            if (children.at(i)->parentItem() == 0 && (children.at(i)->type() == AVWIDGET || children.at(i)->type() == TRANSITIONWIDGET)) {
                 if (!static_cast <AbstractClipItem *>(children.at(i))->isItemLocked()) {
                     children.at(i)->setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
                     children.at(i)->setSelected(selectItems);
@@ -917,13 +1049,13 @@ void CustomTrackView::groupSelectedItems(bool force, bool createNewGroup)
     }
     QList<QGraphicsItem *> selection = m_scene->selectedItems();
     if (selection.isEmpty()) return;
-    QPointF top = selection.at(0)->sceneBoundingRect().topLeft();
+    QRectF rectUnion;
     // Find top left position of selection
-    for (int i = 1; i < selection.count(); i++) {
-        if (selection.at(i)->type() == AVWIDGET || selection.at(i)->type() == TRANSITIONWIDGET || selection.at(i)->type() == GROUPWIDGET) {
-            QPointF currenttop = selection.at(i)->sceneBoundingRect().topLeft();
-            if (currenttop.x() < top.x()) top.setX(currenttop.x());
-            if (currenttop.y() < top.y()) top.setY(currenttop.y());
+    for (int i = 0; i < selection.count(); i++) {
+        if (selection.at(i)->parentItem() == 0 && (selection.at(i)->type() == AVWIDGET || selection.at(i)->type() == TRANSITIONWIDGET || selection.at(i)->type() == GROUPWIDGET)) {
+            rectUnion = rectUnion.united(selection.at(i)->sceneBoundingRect());
+        } else if (selection.at(i)->parentItem()) {
+            rectUnion = rectUnion.united(selection.at(i)->parentItem()->sceneBoundingRect());
         }
     }
 
@@ -932,8 +1064,11 @@ void CustomTrackView::groupSelectedItems(bool force, bool createNewGroup)
         KdenliveSettings::setSnaptopoints(false);
         if (createNewGroup) {
             AbstractGroupItem *newGroup = m_document->clipManager()->createGroup();
-            newGroup->translate(-top.x(), -top.y() + 1);
-            newGroup->setPos(top.x(), top.y() - 1);
+            newGroup->setPos(rectUnion.left(), rectUnion.top() - 1);
+            QPointF diff = newGroup->pos();
+            newGroup->translate(-diff.x(), -diff.y());
+            //newGroup->translate((int) -rectUnion.left(), (int) -rectUnion.top() + 1);
+
             scene()->addItem(newGroup);
 
             // CHeck if we are trying to include a group in a group
@@ -962,11 +1097,14 @@ void CustomTrackView::groupSelectedItems(bool force, bool createNewGroup)
             KdenliveSettings::setSnaptopoints(snap);
         } else {
             m_selectionGroup = new AbstractGroupItem(m_document->fps());
-            m_selectionGroup->translate(-top.x(), -top.y() + 1);
-            m_selectionGroup->setPos(top.x(), top.y() - 1);
+            m_selectionGroup->setPos(rectUnion.left(), rectUnion.top() - 1);
+            QPointF diff = m_selectionGroup->pos();
+            //m_selectionGroup->translate((int) - rectUnion.left(), (int) -rectUnion.top() + 1);
+            m_selectionGroup->translate(- diff.x(), -diff.y());
+
             scene()->addItem(m_selectionGroup);
             for (int i = 0; i < selection.count(); i++) {
-                if (selection.at(i)->parentItem() == NULL && (selection.at(i)->type() == AVWIDGET || selection.at(i)->type() == TRANSITIONWIDGET || selection.at(i)->type() == GROUPWIDGET)) {
+                if (selection.at(i)->parentItem() == 0 && (selection.at(i)->type() == AVWIDGET || selection.at(i)->type() == TRANSITIONWIDGET || selection.at(i)->type() == GROUPWIDGET)) {
                     m_selectionGroup->addToGroup(selection.at(i));
                     selection.at(i)->setFlags(QGraphicsItem::ItemIsSelectable);
                 }
@@ -982,39 +1120,40 @@ void CustomTrackView::groupSelectedItems(bool force, bool createNewGroup)
 
 void CustomTrackView::mouseDoubleClickEvent(QMouseEvent *event)
 {
-    kDebug() << "++++++++++++ DBL CLK";
     if (m_dragItem && m_dragItem->hasKeyFrames()) {
         if (m_moveOpMode == KEYFRAME) {
             // user double clicked on a keyframe, open edit dialog
             QDialog d(parentWidget());
             Ui::KeyFrameDialog_UI view;
             view.setupUi(&d);
-            view.kfr_position->setText(m_document->timecode().getTimecode(GenTime(m_dragItem->selectedKeyFramePos(), m_document->fps()) - m_dragItem->cropStart(), m_document->fps()));
+            view.kfr_position->setText(m_document->timecode().getTimecode(GenTime(m_dragItem->selectedKeyFramePos(), m_document->fps()) - m_dragItem->cropStart()));
             view.kfr_value->setValue(m_dragItem->selectedKeyFrameValue());
             view.kfr_value->setFocus();
             if (d.exec() == QDialog::Accepted) {
-                int pos = m_document->timecode().getFrameCount(view.kfr_position->text(), m_document->fps());
+                int pos = m_document->timecode().getFrameCount(view.kfr_position->text());
                 m_dragItem->updateKeyFramePos(GenTime(pos, m_document->fps()) + m_dragItem->cropStart(), (double) view.kfr_value->value() * m_dragItem->keyFrameFactor());
-                ClipItem *item = (ClipItem *)m_dragItem;
+                ClipItem *item = static_cast <ClipItem *>(m_dragItem);
                 QString previous = item->keyframes(item->selectedEffectIndex());
                 item->updateKeyframeEffect();
                 QString next = item->keyframes(item->selectedEffectIndex());
                 EditKeyFrameCommand *command = new EditKeyFrameCommand(this, item->track(), item->startPos(), item->selectedEffectIndex(), previous, next, false);
                 m_commandStack->push(command);
                 updateEffect(m_document->tracksCount() - item->track(), item->startPos(), item->selectedEffect(), item->selectedEffectIndex());
+                emit clipItemSelected(item, item->selectedEffectIndex());
             }
 
         } else  {
             // add keyframe
             GenTime keyFramePos = GenTime((int)(mapToScene(event->pos()).x()), m_document->fps()) - m_dragItem->startPos() + m_dragItem->cropStart();
             m_dragItem->addKeyFrame(keyFramePos, mapToScene(event->pos()).toPoint().y());
-            ClipItem * item = (ClipItem *) m_dragItem;
+            ClipItem * item = static_cast <ClipItem *>(m_dragItem);
             QString previous = item->keyframes(item->selectedEffectIndex());
             item->updateKeyframeEffect();
             QString next = item->keyframes(item->selectedEffectIndex());
             EditKeyFrameCommand *command = new EditKeyFrameCommand(this, m_dragItem->track(), m_dragItem->startPos(), item->selectedEffectIndex(), previous, next, false);
             m_commandStack->push(command);
             updateEffect(m_document->tracksCount() - item->track(), item->startPos(), item->selectedEffect(), item->selectedEffectIndex());
+            emit clipItemSelected(item, item->selectedEffectIndex());
         }
     } else if (m_dragItem && !m_dragItem->isItemLocked()) {
         ClipDurationDialog d(m_dragItem, m_document->timecode(), this);
@@ -1045,12 +1184,12 @@ void CustomTrackView::mouseDoubleClickEvent(QMouseEvent *event)
                 QUndoCommand *moveCommand = new QUndoCommand();
                 moveCommand->setText(i18n("Edit clip"));
                 ItemInfo clipInfo = m_dragItem->info();
-                if (d.duration() < m_dragItem->duration() || d.cropStart() != clipInfo.cropStart) {
+                if (d.duration() < m_dragItem->cropDuration() || d.cropStart() != clipInfo.cropStart) {
                     // duration was reduced, so process it first
                     ItemInfo startInfo = clipInfo;
                     clipInfo.endPos = clipInfo.startPos + d.duration();
                     clipInfo.cropStart = d.cropStart();
-                    new ResizeClipCommand(this, startInfo, clipInfo, true, moveCommand);
+                    new ResizeClipCommand(this, startInfo, clipInfo, true, false, moveCommand);
                 }
                 if (d.startPos() != clipInfo.startPos) {
                     ItemInfo startInfo = clipInfo;
@@ -1058,12 +1197,12 @@ void CustomTrackView::mouseDoubleClickEvent(QMouseEvent *event)
                     clipInfo.endPos = m_dragItem->endPos() + (clipInfo.startPos - startInfo.startPos);
                     new MoveClipCommand(this, startInfo, clipInfo, true, moveCommand);
                 }
-                if (d.duration() > m_dragItem->duration()) {
+                if (d.duration() > m_dragItem->cropDuration()) {
                     // duration was increased, so process it after move
                     ItemInfo startInfo = clipInfo;
                     clipInfo.endPos = clipInfo.startPos + d.duration();
                     clipInfo.cropStart = d.cropStart();
-                    new ResizeClipCommand(this, startInfo, clipInfo, true, moveCommand);
+                    new ResizeClipCommand(this, startInfo, clipInfo, true, false, moveCommand);
                 }
                 m_commandStack->push(moveCommand);
             }
@@ -1083,7 +1222,7 @@ void CustomTrackView::editKeyFrame(const GenTime pos, const int track, const int
     ClipItem *clip = getClipItemAt((int)pos.frames(m_document->fps()), track);
     if (clip) {
         clip->setKeyframes(index, keyframes);
-        updateEffect(m_document->tracksCount() - clip->track(), clip->startPos(), clip->effectAt(index), index);
+        updateEffect(m_document->tracksCount() - clip->track(), clip->startPos(), clip->effectAt(index), index, false);
     } else emit displayMessage(i18n("Cannot find clip with keyframe"), ErrorMessage);
 }
 
@@ -1094,7 +1233,6 @@ void CustomTrackView::displayContextMenu(QPoint pos, AbstractClipItem *clip, Abs
     m_editGuide->setEnabled(m_dragGuide != NULL);
     if (clip == NULL) m_timelineContextMenu->popup(pos);
     else if (group != NULL) {
-        m_changeSpeedAction->setEnabled(false);
         m_pasteEffectsAction->setEnabled(m_copiedItems.count() == 1);
         m_ungroupAction->setEnabled(true);
         updateClipTypeActions(NULL);
@@ -1104,7 +1242,6 @@ void CustomTrackView::displayContextMenu(QPoint pos, AbstractClipItem *clip, Abs
         if (clip->type() == AVWIDGET) {
             ClipItem *item = static_cast <ClipItem*>(clip);
             updateClipTypeActions(item);
-            m_changeSpeedAction->setEnabled(item->clipType() == AV || item->clipType() == VIDEO);
             m_pasteEffectsAction->setEnabled(m_copiedItems.count() == 1);
             m_timelineContextClipMenu->popup(pos);
         } else if (clip->type() == TRANSITIONWIDGET) m_timelineContextTransitionMenu->popup(pos);
@@ -1116,96 +1253,131 @@ void CustomTrackView::activateMonitor()
     emit activateDocumentMonitor();
 }
 
-void CustomTrackView::dragEnterEvent(QDragEnterEvent * event)
+bool CustomTrackView::insertDropClips(const QMimeData *data, const QPoint pos)
 {
-    if (event->mimeData()->hasFormat("kdenlive/clip")) {
+    if (data->hasFormat("kdenlive/clip")) {
         m_clipDrag = true;
         resetSelectionGroup();
-        QStringList list = QString(event->mimeData()->data("kdenlive/clip")).split(';');
-        m_selectionGroup = new AbstractGroupItem(m_document->fps());
-        QPoint pos;
+        QStringList list = QString(data->data("kdenlive/clip")).split(';');
         DocClipBase *clip = m_document->getBaseClip(list.at(0));
-        if (clip == NULL) kDebug() << " WARNING))))))))) CLIP NOT FOUND : " << list.at(0);
+        if (clip == NULL) {
+            kDebug() << " WARNING))))))))) CLIP NOT FOUND : " << list.at(0);
+            return false;
+        }
+        const QPointF framePos = mapToScene(pos);
         ItemInfo info;
         info.startPos = GenTime();
         info.cropStart = GenTime(list.at(1).toInt(), m_document->fps());
         info.endPos = GenTime(list.at(2).toInt() - list.at(1).toInt(), m_document->fps());
-        info.track = (int)(1 / m_tracksHeight);
-        ClipItem *item = new ClipItem(clip, info, m_document->fps(), 1.0);
+        info.cropDuration = info.endPos - info.startPos;
+        info.originalcropStart = info.cropStart;
+        info.track = 0;
+
+        // Check if clip can be inserted at that position
+        ItemInfo pasteInfo = info;
+        pasteInfo.startPos = GenTime((int)(framePos.x() + 0.5), m_document->fps());
+        pasteInfo.endPos = pasteInfo.startPos + info.endPos;
+        pasteInfo.track = (int)(framePos.y() / m_tracksHeight);
+        if (!canBePastedTo(pasteInfo, AVWIDGET)) {
+            return true;
+        }
+        m_selectionGroup = new AbstractGroupItem(m_document->fps());
+        ClipItem *item = new ClipItem(clip, info, m_document->fps(), 1.0, 1);
         m_selectionGroup->addToGroup(item);
         item->setFlags(QGraphicsItem::ItemIsSelectable);
-        //TODO: check if we do not overlap another clip when first dropping in timeline
-        // if (insertPossible(m_selectionGroup, event->pos()))
+
         QList <GenTime> offsetList;
         offsetList.append(info.endPos);
         updateSnapPoints(NULL, offsetList);
+        m_selectionGroup->setPos(framePos);
         scene()->addItem(m_selectionGroup);
-        event->acceptProposedAction();
-    } else if (event->mimeData()->hasFormat("kdenlive/producerslist")) {
+        return true;
+    } else if (data->hasFormat("kdenlive/producerslist")) {
         m_clipDrag = true;
-        QStringList ids = QString(event->mimeData()->data("kdenlive/producerslist")).split(';');
+        QStringList ids = QString(data->data("kdenlive/producerslist")).split(';');
         m_scene->clearSelection();
         resetSelectionGroup(false);
 
-        m_selectionGroup = new AbstractGroupItem(m_document->fps());
-        QPoint pos;
-        GenTime start;
         QList <GenTime> offsetList;
+        QList <ItemInfo> infoList;
+        const QPointF framePos = mapToScene(pos);
+        GenTime start = GenTime((int)(framePos.x() + 0.5), m_document->fps());
+        int track = (int)(framePos.y() / m_tracksHeight);
+
+        // Check if clips can be inserted at that position
         for (int i = 0; i < ids.size(); ++i) {
             DocClipBase *clip = m_document->getBaseClip(ids.at(i));
-            if (clip == NULL) kDebug() << " WARNING))))))))) CLIP NOT FOUND : " << ids.at(i);
+            if (clip == NULL) {
+                kDebug() << " WARNING))))))))) CLIP NOT FOUND : " << ids.at(i);
+                return false;
+            }
             ItemInfo info;
             info.startPos = start;
-            info.endPos = info.startPos + clip->duration();
-            info.track = (int)(1 / m_tracksHeight);
-            ClipItem *item = new ClipItem(clip, info, m_document->fps(), 1.0);
+            info.cropDuration = clip->duration();
+            info.endPos = info.startPos + info.cropDuration;
+            info.track = track;
+            infoList.append(info);
             start += clip->duration();
+        }
+        if (!canBePastedTo(infoList, AVWIDGET)) {
+            return true;
+        }
+        m_selectionGroup = new AbstractGroupItem(m_document->fps());
+        start = GenTime();
+        for (int i = 0; i < ids.size(); ++i) {
+            DocClipBase *clip = m_document->getBaseClip(ids.at(i));
+            ItemInfo info;
+            info.startPos = start;
+            info.cropDuration = clip->duration();
+            info.endPos = info.startPos + info.cropDuration;
+            info.track = 0;
+            start += info.cropDuration;
             offsetList.append(start);
-            m_selectionGroup->addToGroup(item);
+            ClipItem *item = new ClipItem(clip, info, m_document->fps(), 1.0, 1, false);
             item->setFlags(QGraphicsItem::ItemIsSelectable);
+            m_selectionGroup->addToGroup(item);
+            m_waitingThumbs.append(item);
         }
-        //TODO: check if we do not overlap another clip when first dropping in timeline
-        //if (insertPossible(m_selectionGroup, event->pos()))
+
         updateSnapPoints(NULL, offsetList);
+        m_selectionGroup->setPos(framePos);
         scene()->addItem(m_selectionGroup);
-        event->acceptProposedAction();
+        m_thumbsTimer.start();
+        return true;
+
     } else {
         // the drag is not a clip (may be effect, ...)
         m_clipDrag = false;
-        QGraphicsView::dragEnterEvent(event);
+        return false;
     }
 }
 
 
-bool CustomTrackView::insertPossible(AbstractGroupItem *group, const QPoint &pos) const
+
+void CustomTrackView::dragEnterEvent(QDragEnterEvent * event)
 {
-    QPolygonF path;
-    QList<QGraphicsItem *> children = group->childItems();
-    for (int i = 0; i < children.count(); i++) {
-        if (children.at(i)->type() == AVWIDGET) {
-            ClipItem *clip = static_cast <ClipItem *>(children.at(i));
-            ItemInfo info = clip->info();
-            kDebug() << " / / INSERT : " << pos.x();
-            QRectF shape = QRectF(clip->startPos().frames(m_document->fps()), clip->track() * m_tracksHeight + 1, clip->duration().frames(m_document->fps()) - 0.02, m_tracksHeight - 1);
-            kDebug() << " / / INSERT RECT: " << shape;
-            path = path.united(QPolygonF(shape));
-        }
-    }
+    if (insertDropClips(event->mimeData(), event->pos())) {
+        event->acceptProposedAction();
+    } else QGraphicsView::dragEnterEvent(event);
+}
 
-    QList<QGraphicsItem*> collindingItems = scene()->items(path, Qt::IntersectsItemShape);
-    if (collindingItems.isEmpty()) return true;
+bool CustomTrackView::itemCollision(AbstractClipItem *item, ItemInfo newPos)
+{
+    QRectF shape = QRectF(newPos.startPos.frames(m_document->fps()), newPos.track * m_tracksHeight + 1, (newPos.endPos - newPos.startPos).frames(m_document->fps()) - 0.02, m_tracksHeight - 1);
+    QList<QGraphicsItem*> collindingItems = scene()->items(shape, Qt::IntersectsItemShape);
+    collindingItems.removeAll(item);
+    if (collindingItems.isEmpty()) return false;
     else {
         for (int i = 0; i < collindingItems.count(); i++) {
             QGraphicsItem *collision = collindingItems.at(i);
-            if (collision->type() == AVWIDGET) {
+            if (collision->type() == item->type()) {
                 // Collision
                 kDebug() << "// COLLISIION DETECTED";
-                return false;
+                return true;
             }
         }
-        return true;
+        return false;
     }
-
 }
 
 void CustomTrackView::slotRefreshEffects(ClipItem *clip)
@@ -1226,23 +1398,57 @@ void CustomTrackView::slotRefreshEffects(ClipItem *clip)
 
 void CustomTrackView::addEffect(int track, GenTime pos, QDomElement effect)
 {
-    ClipItem *clip = getClipItemAt((int)pos.frames(m_document->fps()) + 1, m_document->tracksCount() - track);
+    ClipItem *clip = getClipItemAt((int)pos.frames(m_document->fps()), m_document->tracksCount() - track);
     if (clip) {
-        if (!m_document->renderer()->mltAddEffect(track, pos, clip->addEffect(effect)))
+        // Special case: speed effect
+        if (effect.attribute("id") == "speed") {
+            if (clip->clipType() != VIDEO && clip->clipType() != AV && clip->clipType() != PLAYLIST) {
+                emit displayMessage(i18n("Problem adding effect to clip"), ErrorMessage);
+                return;
+            }
+            ItemInfo info = clip->info();
+            double speed = EffectsList::parameter(effect, "speed").toDouble() / 100.0;
+            int strobe = EffectsList::parameter(effect, "strobe").toInt();
+            if (strobe == 0) strobe = 1;
+            doChangeClipSpeed(info, speed, 1.0, strobe, clip->baseClip()->getId());
+            EffectsParameterList params = clip->addEffect(effect);
+            m_document->renderer()->mltAddEffect(track, pos, params);
+            if (clip->isSelected()) emit clipItemSelected(clip);
+            return;
+        }
+        EffectsParameterList params = clip->addEffect(effect);
+        if (effect.attribute("disabled") == "1") {
+            // Effect is disabled, don't add it to MLT playlist
+            if (clip->isSelected()) emit clipItemSelected(clip);
+            return;
+        }
+        if (!m_document->renderer()->mltAddEffect(track, pos, params))
             emit displayMessage(i18n("Problem adding effect to clip"), ErrorMessage);
-        emit clipItemSelected(clip);
+        if (clip->isSelected()) emit clipItemSelected(clip);
     } else emit displayMessage(i18n("Cannot find clip to add effect"), ErrorMessage);
 }
 
 void CustomTrackView::deleteEffect(int track, GenTime pos, QDomElement effect)
 {
     QString index = effect.attribute("kdenlive_ix");
+    // Special case: speed effect
+    if (effect.attribute("id") == "speed") {
+        ClipItem *clip = getClipItemAt((int)pos.frames(m_document->fps()), m_document->tracksCount() - track);
+        if (clip) {
+            ItemInfo info = clip->info();
+            doChangeClipSpeed(info, 1.0, clip->speed(), 1, clip->baseClip()->getId());
+            clip->deleteEffect(index);
+            emit clipItemSelected(clip);
+            m_document->renderer()->mltRemoveEffect(track, pos, index, true);
+            return;
+        }
+    }
     if (!m_document->renderer()->mltRemoveEffect(track, pos, index, true) && effect.attribute("disabled") != "1") {
         kDebug() << "// ERROR REMOV EFFECT: " << index << ", DISABLE: " << effect.attribute("disabled");
         emit displayMessage(i18n("Problem deleting effect"), ErrorMessage);
         return;
     }
-    ClipItem *clip = getClipItemAt((int)pos.frames(m_document->fps()) + 1, m_document->tracksCount() - track);
+    ClipItem *clip = getClipItemAt((int)pos.frames(m_document->fps()), m_document->tracksCount() - track);
     if (clip) {
         clip->deleteEffect(index);
         emit clipItemSelected(clip);
@@ -1289,7 +1495,7 @@ void CustomTrackView::slotAddGroupEffect(QDomElement effect, AbstractGroupItem *
     }
     if (count > 0) {
         m_commandStack->push(effectCommand);
-        m_document->setModified(true);
+        setDocumentModified();
     } else delete effectCommand;
 }
 
@@ -1305,20 +1511,26 @@ void CustomTrackView::slotAddEffect(QDomElement effect, GenTime pos, int track)
     int count = 0;
     if (track == -1) itemList = scene()->selectedItems();
     if (itemList.isEmpty()) {
-        ClipItem *clip = getClipItemAt((int)pos.frames(m_document->fps()) + 1, track);
+        ClipItem *clip = getClipItemAt((int) pos.frames(m_document->fps()), track);
         if (clip) itemList.append(clip);
         else emit displayMessage(i18n("Select a clip if you want to apply an effect"), ErrorMessage);
     }
     kDebug() << "// REQUESTING EFFECT ON CLIP: " << pos.frames(25) << ", TRK: " << track << "SELECTED ITEMS: " << itemList.count();
     for (int i = 0; i < itemList.count(); i++) {
         if (itemList.at(i)->type() == AVWIDGET) {
-            ClipItem *item = (ClipItem *)itemList.at(i);
+            ClipItem *item = static_cast <ClipItem *>(itemList.at(i));
             if (effect.attribute("type") == "audio") {
                 // Don't add audio effects on video clips
-                if (item->isVideoOnly() || (item->clipType() != AUDIO && item->clipType() != AV && item->clipType() != PLAYLIST)) continue;
+                if (item->isVideoOnly() || (item->clipType() != AUDIO && item->clipType() != AV && item->clipType() != PLAYLIST)) {
+                    emit displayMessage(i18n("Cannot add an audio effect to this clip"), ErrorMessage);
+                    continue;
+                }
             } else if (effect.hasAttribute("type") == false) {
                 // Don't add video effect on audio clips
-                if (item->isAudioOnly() || item->clipType() == AUDIO) continue;
+                if (item->isAudioOnly() || item->clipType() == AUDIO) {
+                    emit displayMessage(i18n("Cannot add a video effect to this clip"), ErrorMessage);
+                    continue;
+                }
             }
             if (item->hasEffect(effect.attribute("tag"), effect.attribute("id")) != -1 && effect.attribute("unique", "0") != "0") {
                 emit displayMessage(i18n("Effect already present in clip"), ErrorMessage);
@@ -1339,7 +1551,7 @@ void CustomTrackView::slotAddEffect(QDomElement effect, GenTime pos, int track)
     }
     if (count > 0) {
         m_commandStack->push(effectCommand);
-        m_document->setModified(true);
+        setDocumentModified();
     } else delete effectCommand;
 }
 
@@ -1347,13 +1559,32 @@ void CustomTrackView::slotDeleteEffect(ClipItem *clip, QDomElement effect)
 {
     AddEffectCommand *command = new AddEffectCommand(this, m_document->tracksCount() - clip->track(), clip->startPos(), effect, false);
     m_commandStack->push(command);
-    m_document->setModified(true);
+    setDocumentModified();
 }
 
-void CustomTrackView::updateEffect(int track, GenTime pos, QDomElement effect, int ix, bool triggeredByUser)
+void CustomTrackView::updateEffect(int track, GenTime pos, QDomElement insertedEffect, int ix, bool triggeredByUser)
 {
-    ClipItem *clip = getClipItemAt((int)pos.frames(m_document->fps()) + 1, m_document->tracksCount() - track);
+    ClipItem *clip = getClipItemAt((int)pos.frames(m_document->fps()), m_document->tracksCount() - track);
+    QDomElement effect = insertedEffect.cloneNode().toElement();
     if (clip) {
+        // Special case: speed effect
+        if (effect.attribute("id") == "speed") {
+            ItemInfo info = clip->info();
+            if (effect.attribute("disabled") == "1") doChangeClipSpeed(info, 1.0, clip->speed(), 1, clip->baseClip()->getId());
+            else {
+                double speed = EffectsList::parameter(effect, "speed").toDouble() / 100.0;
+                int strobe = EffectsList::parameter(effect, "strobe").toInt();
+                if (strobe == 0) strobe = 1;
+                doChangeClipSpeed(info, speed, clip->speed(), strobe, clip->baseClip()->getId());
+            }
+            clip->setEffectAt(ix, effect);
+            if (ix == clip->selectedEffectIndex()) {
+                clip->setSelectedEffect(ix);
+                if (!triggeredByUser) emit clipItemSelected(clip, ix);
+            }
+            return;
+        }
+
         EffectsParameterList effectParams = clip->getEffectArgs(effect);
         if (effect.attribute("tag") == "ladspa") {
             // Update the ladspa affect file
@@ -1362,7 +1593,6 @@ void CustomTrackView::updateEffect(int track, GenTime pos, QDomElement effect, i
         // check if we are trying to reset a keyframe effect
         if (effectParams.hasParam("keyframes") && effectParams.paramValue("keyframes").isEmpty()) {
             clip->initEffect(effect);
-            clip->setEffectAt(ix, effect);
             effectParams = clip->getEffectArgs(effect);
         }
         if (effectParams.paramValue("disabled") == "1") {
@@ -1389,38 +1619,44 @@ void CustomTrackView::updateEffect(int track, GenTime pos, QDomElement effect, i
             }
         }
     }
-    m_document->setModified(true);
+    setDocumentModified();
 }
 
 void CustomTrackView::moveEffect(int track, GenTime pos, int oldPos, int newPos)
 {
-    ClipItem *clip = getClipItemAt((int)pos.frames(m_document->fps()) + 1, m_document->tracksCount() - track);
-    if (clip) {
-        m_document->renderer()->mltMoveEffect(track, pos, oldPos, newPos);
-        QDomElement act = clip->effectAt(newPos - 1).cloneNode().toElement();
-        QDomElement before = clip->effectAt(oldPos - 1).cloneNode().toElement();
+    ClipItem *clip = getClipItemAt((int)pos.frames(m_document->fps()), m_document->tracksCount() - track);
+    if (clip && !clip->effectAt(newPos - 1).isNull() && !clip->effectAt(oldPos - 1).isNull()) {
+        QDomElement act = clip->effectAt(newPos - 1);
+        QDomElement before = clip->effectAt(oldPos - 1);
         clip->setEffectAt(oldPos - 1, act);
         clip->setEffectAt(newPos - 1, before);
+        // special case: speed effect, which is a pseudo-effect, not appearing in MLT's effects
+        if (act.attribute("id") == "speed") {
+            m_document->renderer()->mltUpdateEffectPosition(track, pos, oldPos, newPos);
+        } else if (before.attribute("id") == "speed") {
+            m_document->renderer()->mltUpdateEffectPosition(track, pos, newPos, oldPos);
+        } else m_document->renderer()->mltMoveEffect(track, pos, oldPos, newPos);
         emit clipItemSelected(clip, newPos - 1);
-    }
-    m_document->setModified(true);
+        setDocumentModified();
+    } else emit displayMessage(i18n("Cannot move effect"), ErrorMessage);
 }
 
 void CustomTrackView::slotChangeEffectState(ClipItem *clip, int effectPos, bool disable)
 {
     QDomElement effect = clip->effectAt(effectPos);
     QDomElement oldEffect = effect.cloneNode().toElement();
-    effect.setAttribute("disabled", disable);
+
+    effect.setAttribute("disabled", (int) disable);
     EditEffectCommand *command = new EditEffectCommand(this, m_document->tracksCount() - clip->track(), clip->startPos(), oldEffect, effect, effectPos, true);
     m_commandStack->push(command);
-    m_document->setModified(true);
+    setDocumentModified();;
 }
 
 void CustomTrackView::slotChangeEffectPosition(ClipItem *clip, int currentPos, int newPos)
 {
     MoveEffectCommand *command = new MoveEffectCommand(this, m_document->tracksCount() - clip->track(), clip->startPos(), currentPos, newPos);
     m_commandStack->push(command);
-    m_document->setModified(true);
+    setDocumentModified();
 }
 
 void CustomTrackView::slotUpdateClipEffect(ClipItem *clip, QDomElement oldeffect, QDomElement effect, int ix)
@@ -1433,7 +1669,7 @@ void CustomTrackView::cutClip(ItemInfo info, GenTime cutTime, bool cut)
 {
     if (cut) {
         // cut clip
-        ClipItem *item = getClipItemAt((int) info.startPos.frames(m_document->fps()) + 1, info.track);
+        ClipItem *item = getClipItemAt((int) info.startPos.frames(m_document->fps()), info.track);
         if (!item || cutTime >= item->endPos() || cutTime <= item->startPos()) {
             emit displayMessage(i18n("Cannot find clip to cut"), ErrorMessage);
             kDebug() << "/////////  ERROR CUTTING CLIP : (" << item->startPos().frames(25) << "-" << item->endPos().frames(25) << "), INFO: (" << info.startPos.frames(25) << "-" << info.endPos.frames(25) << ")" << ", CUT: " << cutTime.frames(25);
@@ -1448,7 +1684,7 @@ void CustomTrackView::cutClip(ItemInfo info, GenTime cutTime, bool cut)
 
         m_document->renderer()->mltCutClip(m_document->tracksCount() - info.track, cutTime);
         int cutPos = (int) cutTime.frames(m_document->fps());
-        ItemInfo newPos;
+        ItemInfo newPos = info;
         double speed = item->speed();
         newPos.startPos = cutTime;
         newPos.endPos = info.endPos;
@@ -1473,14 +1709,13 @@ void CustomTrackView::cutClip(ItemInfo info, GenTime cutTime, bool cut)
         if (dup->checkKeyFrames()) slotRefreshEffects(dup);
         item->baseClip()->addReference();
         m_document->updateClip(item->baseClip()->getId());
-        m_document->setModified(true);
-        kDebug() << "/////////  CUTTING CLIP RESULT: (" << item->startPos().frames(25) << "-" << item->endPos().frames(25) << "), DUP: (" << dup->startPos().frames(25) << "-" << dup->endPos().frames(25) << ")" << ", CUT: " << cutTime.frames(25);
-        kDebug() << "//  CUTTING CLIP dONE";
+        setDocumentModified();
+        //kDebug() << "/////////  CUTTING CLIP RESULT: (" << item->startPos().frames(25) << "-" << item->endPos().frames(25) << "), DUP: (" << dup->startPos().frames(25) << "-" << dup->endPos().frames(25) << ")" << ", CUT: " << cutTime.frames(25);
     } else {
         // uncut clip
 
         ClipItem *item = getClipItemAt((int) info.startPos.frames(m_document->fps()), info.track);
-        ClipItem *dup = getClipItemAt((int) cutTime.frames(m_document->fps()) + 1, info.track);
+        ClipItem *dup = getClipItemAt((int) cutTime.frames(m_document->fps()), info.track);
         if (!item || !dup || item == dup) {
             emit displayMessage(i18n("Cannot find clip to uncut"), ErrorMessage);
             m_blockRefresh = false;
@@ -1491,9 +1726,9 @@ void CustomTrackView::cutClip(ItemInfo info, GenTime cutTime, bool cut)
             return;
         }
 
-        kDebug() << "// UNCUTTING CLIPS: ITEM 1 (" << item->startPos().frames(25) << "x" << item->endPos().frames(25) << ")";
+        /*kDebug() << "// UNCUTTING CLIPS: ITEM 1 (" << item->startPos().frames(25) << "x" << item->endPos().frames(25) << ")";
         kDebug() << "// UNCUTTING CLIPS: ITEM 2 (" << dup->startPos().frames(25) << "x" << dup->endPos().frames(25) << ")";
-        kDebug() << "// UNCUTTING CLIPS, INFO (" << info.startPos.frames(25) << "x" << info.endPos.frames(25) << ") , CUT: " << cutTime.frames(25);;
+        kDebug() << "// UNCUTTING CLIPS, INFO (" << info.startPos.frames(25) << "x" << info.endPos.frames(25) << ") , CUT: " << cutTime.frames(25);;*/
         //deleteClip(dup->info());
 
 
@@ -1508,7 +1743,7 @@ void CustomTrackView::cutClip(ItemInfo info, GenTime cutTime, bool cut)
         bool success = m_document->renderer()->mltResizeClipEnd(clipinfo, info.endPos - info.startPos);
         if (success) {
             item->resizeEnd((int) info.endPos.frames(m_document->fps()));
-            m_document->setModified(true);
+            setDocumentModified();
         } else
             emit displayMessage(i18n("Error when resizing clip"), ErrorMessage);
 
@@ -1532,7 +1767,7 @@ void CustomTrackView::slotAddTransitionToSelectedClips(QDomElement transition)
             ClipItem *transitionClip = NULL;
             const int transitiontrack = getPreviousVideoTrack(info.track);
             GenTime pos = GenTime((int)(mapToScene(m_menuPosition).x()), m_document->fps());
-            if (pos < item->startPos() + item->duration() / 2) {
+            if (pos < item->startPos() + item->cropDuration() / 2) {
                 // add transition to clip start
                 info.startPos = item->startPos();
                 if (transitiontrack != 0) transitionClip = getClipItemAt((int) info.startPos.frames(m_document->fps()), m_document->tracksCount() - transitiontrack);
@@ -1618,42 +1853,42 @@ void CustomTrackView::slotAddTransition(ClipItem* /*clip*/, ItemInfo transitionI
     }
     AddTransitionCommand* command = new AddTransitionCommand(this, transitionInfo, endTrack, transition, false, true);
     m_commandStack->push(command);
-    m_document->setModified(true);
+    setDocumentModified();
 }
 
-void CustomTrackView::addTransition(ItemInfo transitionInfo, int endTrack, QDomElement params)
+void CustomTrackView::addTransition(ItemInfo transitionInfo, int endTrack, QDomElement params, bool refresh)
 {
     Transition *tr = new Transition(transitionInfo, endTrack, m_document->fps(), params, true);
     //kDebug() << "---- ADDING transition " << params.attribute("value");
-    if (m_document->renderer()->mltAddTransition(tr->transitionTag(), endTrack, m_document->tracksCount() - transitionInfo.track, transitionInfo.startPos, transitionInfo.endPos, tr->toXML())) {
+    if (m_document->renderer()->mltAddTransition(tr->transitionTag(), endTrack, m_document->tracksCount() - transitionInfo.track, transitionInfo.startPos, transitionInfo.endPos, tr->toXML(), refresh)) {
         scene()->addItem(tr);
-        m_document->setModified(true);
+        setDocumentModified();
     } else {
         emit displayMessage(i18n("Cannot add transition"), ErrorMessage);
         delete tr;
     }
 }
 
-void CustomTrackView::deleteTransition(ItemInfo transitionInfo, int endTrack, QDomElement /*params*/)
+void CustomTrackView::deleteTransition(ItemInfo transitionInfo, int endTrack, QDomElement /*params*/, bool refresh)
 {
     Transition *item = getTransitionItemAt(transitionInfo.startPos, transitionInfo.track);
     if (!item) {
         emit displayMessage(i18n("Select clip to delete"), ErrorMessage);
         return;
     }
-    m_document->renderer()->mltDeleteTransition(item->transitionTag(), endTrack, m_document->tracksCount() - transitionInfo.track, transitionInfo.startPos, transitionInfo.endPos, item->toXML());
+    m_document->renderer()->mltDeleteTransition(item->transitionTag(), endTrack, m_document->tracksCount() - transitionInfo.track, transitionInfo.startPos, transitionInfo.endPos, item->toXML(), refresh);
     if (m_dragItem == item) m_dragItem = NULL;
     delete item;
     emit transitionItemSelected(NULL);
-    m_document->setModified(true);
+    setDocumentModified();
 }
 
 void CustomTrackView::slotTransitionUpdated(Transition *tr, QDomElement old)
 {
-    kDebug() << "TRANS UPDATE, TRACKS: " << old.attribute("transition_btrack") << ", NEW: " << tr->toXML().attribute("transition_btrack");
+    //kDebug() << "TRANS UPDATE, TRACKS: " << old.attribute("transition_btrack") << ", NEW: " << tr->toXML().attribute("transition_btrack");
     EditTransitionCommand *command = new EditTransitionCommand(this, tr->track(), tr->startPos(), old, tr->toXML(), false);
     m_commandStack->push(command);
-    m_document->setModified(true);
+    setDocumentModified();
 }
 
 void CustomTrackView::updateTransition(int track, GenTime pos, QDomElement oldTransition, QDomElement transition, bool updateTransitionWidget)
@@ -1672,23 +1907,28 @@ void CustomTrackView::updateTransition(int track, GenTime pos, QDomElement oldTr
         ClipItem *transitionClip = getClipItemAt(info.startPos, info.track);
         if (transitionClip && transitionClip->baseClip()) {
             QString size = transitionClip->baseClip()->getProperty("frame_size");
-            p.setX(size.section('x', 0, 0).toInt());
+            double factor = transitionClip->baseClip()->getProperty("aspect_ratio").toDouble();
+            p.setX((int)(size.section('x', 0, 0).toInt() * factor + 0.5));
             p.setY(size.section('x', 1, 1).toInt());
         }
         emit transitionItemSelected(item, getPreviousVideoTrack(info.track), p, true);
     }
-    m_document->setModified(true);
+    setDocumentModified();
 }
 
 void CustomTrackView::dragMoveEvent(QDragMoveEvent * event)
 {
-    event->setDropAction(Qt::IgnoreAction);
-    const QPointF pos = mapToScene(event->pos());
-    if (m_selectionGroup && m_clipDrag) {
-        m_selectionGroup->setPos(pos.x(), pos.y());
-        emit mousePosition((int)(m_selectionGroup->scenePos().x() + 0.5));
-        event->setDropAction(Qt::MoveAction);
-        event->acceptProposedAction();
+    if (m_clipDrag) {
+        const QPointF pos = mapToScene(event->pos());
+        if (m_selectionGroup) {
+            m_selectionGroup->setPos(pos);
+            emit mousePosition((int)(m_selectionGroup->scenePos().x() + 0.5));
+            event->acceptProposedAction();
+        } else {
+            // Drag enter was not possible, try again at mouse position
+            insertDropClips(event->mimeData(), event->pos());
+            event->accept();
+        }
     } else {
         QGraphicsView::dragMoveEvent(event);
     }
@@ -1697,6 +1937,8 @@ void CustomTrackView::dragMoveEvent(QDragMoveEvent * event)
 void CustomTrackView::dragLeaveEvent(QDragLeaveEvent * event)
 {
     if (m_selectionGroup && m_clipDrag) {
+        m_thumbsTimer.stop();
+        m_waitingThumbs.clear();
         QList<QGraphicsItem *> items = m_selectionGroup->childItems();
         qDeleteAll(items);
         scene()->destroyItemGroup(m_selectionGroup);
@@ -1731,20 +1973,25 @@ void CustomTrackView::dropEvent(QDropEvent * event)
             int tracknumber = m_document->tracksCount() - info.track - 1;
             bool isLocked = m_document->trackInfoAt(tracknumber).isLocked;
             if (isLocked) item->setItemLocked(true);
+            ItemInfo clipInfo = info;
+            clipInfo.track = m_document->tracksCount() - item->track();
+            if (m_document->renderer()->mltInsertClip(clipInfo, item->xml(), item->baseClip()->producer(item->track())) == -1) {
+                emit displayMessage(i18n("Cannot insert clip in timeline"), ErrorMessage);
+            }
 
             if (item->baseClip()->isTransparent() && getTransitionItemAtStart(info.startPos, info.track) == NULL) {
                 // add transparency transition
-                new AddTransitionCommand(this, info, getPreviousVideoTrack(info.track), MainWindow::transitions.getEffectByTag("composite", "composite"), false, true, addCommand);
+                QDomElement trans = MainWindow::transitions.getEffectByTag("composite", "composite").cloneNode().toElement();
+                new AddTransitionCommand(this, info, getPreviousVideoTrack(info.track), trans, false, true, addCommand);
             }
-            info.track = m_document->tracksCount() - item->track();
-            m_document->renderer()->mltInsertClip(info, item->xml(), item->baseClip()->producer(item->track()));
             item->setSelected(true);
         }
         m_commandStack->push(addCommand);
-        m_document->setModified(true);
-        m_changeSpeedAction->setEnabled(hasVideoClip);
+        setDocumentModified();
         m_pasteEffectsAction->setEnabled(m_copiedItems.count() == 1);
         if (items.count() > 1) groupSelectedItems(true);
+        event->setDropAction(Qt::MoveAction);
+        event->accept();
     } else QGraphicsView::dropEvent(event);
     setFocus();
 }
@@ -1799,9 +2046,10 @@ void CustomTrackView::addTrack(TrackInfo type, int ix)
         m_selectionGroup = new AbstractGroupItem(m_document->fps());
         scene()->addItem(m_selectionGroup);
         for (int i = 0; i < selection.count(); i++) {
-            if (selection.at(i)->type() == AVWIDGET || selection.at(i)->type() == TRANSITIONWIDGET)
+            if ((!selection.at(i)->parentItem()) && (selection.at(i)->type() == AVWIDGET || selection.at(i)->type() == TRANSITIONWIDGET || selection.at(i)->type() == GROUPWIDGET)) {
                 m_selectionGroup->addToGroup(selection.at(i));
-            selection.at(i)->setFlags(QGraphicsItem::ItemIsSelectable);
+                selection.at(i)->setFlags(QGraphicsItem::ItemIsSelectable);
+            }
         }
         // Move graphic items
         m_selectionGroup->translate(0, m_tracksHeight);
@@ -1809,6 +2057,11 @@ void CustomTrackView::addTrack(TrackInfo type, int ix)
         // adjust track number
         QList<QGraphicsItem *> children = m_selectionGroup->childItems();
         for (int i = 0; i < children.count(); i++) {
+            if (children.at(i)->type() == GROUPWIDGET) {
+                AbstractGroupItem *grp = static_cast<AbstractGroupItem*>(children.at(i));
+                children << grp->childItems();
+                continue;
+            }
             AbstractClipItem *item = static_cast <AbstractClipItem *>(children.at(i));
             item->updateItem();
             ItemInfo clipinfo = item->info();
@@ -1821,7 +2074,6 @@ void CustomTrackView::addTrack(TrackInfo type, int ix)
                     else if (clip->isVideoOnly()) prod = clip->baseClip()->videoProducer();
                     else prod = clip->baseClip()->producer(clipinfo.track);
                     m_document->renderer()->mltUpdateClipProducer((int)(m_document->tracksCount() - clipinfo.track), clipinfo.startPos.frames(m_document->fps()), prod);
-                    kDebug() << "// UPDATING CLIP TO TRACK PROD: " << clipinfo.track;
                 }
             } else if (item->type() == TRANSITIONWIDGET) {
                 Transition *tr = static_cast <Transition *>(item);
@@ -1832,8 +2084,8 @@ void CustomTrackView::addTrack(TrackInfo type, int ix)
             }
         }
         resetSelectionGroup(false);
-
     }
+
     int maxHeight = m_tracksHeight * m_document->tracksCount();
     for (int i = 0; i < m_guides.count(); i++) {
         QLineF l = m_guides.at(i)->line();
@@ -1842,8 +2094,9 @@ void CustomTrackView::addTrack(TrackInfo type, int ix)
     }
     m_cursorLine->setLine(m_cursorLine->line().x1(), 0, m_cursorLine->line().x1(), maxHeight);
     setSceneRect(0, 0, sceneRect().width(), maxHeight);
-    QTimer::singleShot(300, this, SIGNAL(trackHeightChanged()));
     viewport()->update();
+    emit trackHeightChanged();
+    //QTimer::singleShot(500, this, SIGNAL(trackHeightChanged()));
     //setFixedHeight(50 * m_tracksCount);
 }
 
@@ -1862,7 +2115,7 @@ void CustomTrackView::removeTrack(int ix)
     m_selectionGroup = new AbstractGroupItem(m_document->fps());
     scene()->addItem(m_selectionGroup);
     for (int i = 0; i < selection.count(); i++) {
-        if (selection.at(i)->type() == AVWIDGET || selection.at(i)->type() == TRANSITIONWIDGET) {
+        if ((!selection.at(i)->parentItem()) && (selection.at(i)->type() == AVWIDGET || selection.at(i)->type() == TRANSITIONWIDGET || selection.at(i)->type() == GROUPWIDGET)) {
             m_selectionGroup->addToGroup(selection.at(i));
             selection.at(i)->setFlags(QGraphicsItem::ItemIsSelectable);
         }
@@ -1875,6 +2128,11 @@ void CustomTrackView::removeTrack(int ix)
     QList<QGraphicsItem *> children = m_selectionGroup->childItems();
     //kDebug() << "// FOUND CLIPS TO MOVE: " << children.count();
     for (int i = 0; i < children.count(); i++) {
+        if (children.at(i)->type() == GROUPWIDGET) {
+            AbstractGroupItem *grp = static_cast<AbstractGroupItem*>(children.at(i));
+            children << grp->childItems();
+            continue;
+        }
         if (children.at(i)->type() == AVWIDGET) {
             ClipItem *clip = static_cast <ClipItem *>(children.at(i));
             clip->updateItem();
@@ -1907,8 +2165,9 @@ void CustomTrackView::removeTrack(int ix)
     }
     m_cursorLine->setLine(m_cursorLine->line().x1(), 0, m_cursorLine->line().x1(), maxHeight);
     setSceneRect(0, 0, sceneRect().width(), maxHeight);
-    QTimer::singleShot(300, this, SIGNAL(trackHeightChanged()));
     viewport()->update();
+    emit trackHeightChanged();
+    //QTimer::singleShot(500, this, SIGNAL(trackHeightChanged()));
 }
 
 void CustomTrackView::changeTrack(int ix, TrackInfo type)
@@ -1929,7 +2188,7 @@ void CustomTrackView::slotSwitchTrackAudio(int ix)
     m_document->switchTrackAudio(tracknumber, !m_document->trackInfoAt(tracknumber).isMute);
     kDebug() << "NEXT TRK STATE: " << m_document->trackInfoAt(tracknumber).isMute << m_document->trackInfoAt(tracknumber).isBlind;
     m_document->renderer()->mltChangeTrackState(tracknumber + 1, m_document->trackInfoAt(tracknumber).isMute, m_document->trackInfoAt(tracknumber).isBlind);
-    m_document->setModified(true);
+    setDocumentModified();
 }
 
 void CustomTrackView::slotSwitchTrackLock(int ix)
@@ -1957,7 +2216,7 @@ void CustomTrackView::lockTrack(int ix, bool lock)
     }
     kDebug() << "NEXT TRK STATE: " << m_document->trackInfoAt(tracknumber).isLocked;
     viewport()->update();
-    m_document->setModified(true);
+    setDocumentModified();
 }
 
 void CustomTrackView::slotSwitchTrackVideo(int ix)
@@ -1965,7 +2224,25 @@ void CustomTrackView::slotSwitchTrackVideo(int ix)
     int tracknumber = m_document->tracksCount() - ix;
     m_document->switchTrackVideo(tracknumber - 1, !m_document->trackInfoAt(tracknumber - 1).isBlind);
     m_document->renderer()->mltChangeTrackState(tracknumber, m_document->trackInfoAt(tracknumber - 1).isMute, m_document->trackInfoAt(tracknumber - 1).isBlind);
-    m_document->setModified(true);
+    setDocumentModified();
+}
+
+QList<QGraphicsItem *> CustomTrackView::checkForGroups(const QRectF &rect, bool &ok)
+{
+    // Check there is no group going over several tracks there, or that would result in timeline corruption
+    QList<QGraphicsItem *> selection = scene()->items(rect);
+    int maxHeight = m_tracksHeight * 1.5;
+    for (int i = 0; i < selection.count(); i++) {
+        // Check that we don't try to move a group with clips on other tracks
+        if (selection.at(i)->type() == GROUPWIDGET && (selection.at(i)->boundingRect().height() >= maxHeight)) {
+            ok = false;
+            break;
+        } else if (selection.at(i)->parentItem() && (selection.at(i)->parentItem()->boundingRect().height() >= maxHeight)) {
+            ok = false;
+            break;
+        }
+    }
+    return selection;
 }
 
 void CustomTrackView::slotRemoveSpace()
@@ -1981,6 +2258,7 @@ void CustomTrackView::slotRemoveSpace()
         pos = GenTime((int)(mapToScene(m_menuPosition).x()), m_document->fps());
         track = (int)(mapToScene(m_menuPosition).y() / m_tracksHeight);
     }
+
     ClipItem *item = getClipItemAt(pos, track);
     if (item) {
         emit displayMessage(i18n("You must be in an empty space to remove space (time: %1, track: %2)", m_document->timecode().getTimecodeFromFrames(mapToScene(m_menuPosition).x()), track), ErrorMessage);
@@ -1989,12 +2267,20 @@ void CustomTrackView::slotRemoveSpace()
     int length = m_document->renderer()->mltGetSpaceLength(pos, m_document->tracksCount() - track, true);
     //kDebug() << "// GOT LENGT; " << length;
     if (length <= 0) {
-        emit displayMessage(i18n("You must be in an empty space to remove space (time=%1, track:%2)", m_document->timecode().getTimecodeFromFrames(mapToScene(m_menuPosition).x()), track), ErrorMessage);
+        emit displayMessage(i18n("You must be in an empty space to remove space (time%1, track:%2)", m_document->timecode().getTimecodeFromFrames(mapToScene(m_menuPosition).x()), track), ErrorMessage);
         return;
     }
 
-    QRectF r(pos.frames(m_document->fps()), track * m_tracksHeight + m_tracksHeight / 2, sceneRect().width() - pos.frames(m_document->fps()), m_tracksHeight / 2 - 1);
-    QList<QGraphicsItem *> items = m_scene->items(r);
+    // Make sure there is no group in the way
+    QRectF rect(pos.frames(m_document->fps()), track * m_tracksHeight + m_tracksHeight / 2, sceneRect().width() - pos.frames(m_document->fps()), m_tracksHeight / 2 - 2);
+
+    bool isOk;
+    QList<QGraphicsItem *> items = checkForGroups(rect, isOk);
+    if (!isOk) {
+        // groups found on track, do not allow the move
+        emit displayMessage(i18n("Cannot remove space in a track with a group"), ErrorMessage);
+        return;
+    }
 
     QList<ItemInfo> clipsToMove;
     QList<ItemInfo> transitionsToMove;
@@ -2029,19 +2315,20 @@ void CustomTrackView::slotInsertSpace()
     if (d.exec() != QDialog::Accepted) return;
     GenTime spaceDuration = d.selectedDuration();
     track = d.selectedTrack();
+
     ClipItem *item = getClipItemAt(pos, track);
     if (item) pos = item->startPos();
 
-    int minh = 0;
-    int maxh = sceneRect().height();
-    if (track != -1) {
-        minh = track * m_tracksHeight + m_tracksHeight / 2;
-        maxh = m_tracksHeight / 2 - 1;
+    // Make sure there is no group in the way
+    QRectF rect(pos.frames(m_document->fps()), track * m_tracksHeight + m_tracksHeight / 2, sceneRect().width() - pos.frames(m_document->fps()), m_tracksHeight / 2 - 2);
+    bool isOk;
+    QList<QGraphicsItem *> items = checkForGroups(rect, isOk);
+    if (!isOk) {
+        // groups found on track, do not allow the move
+        emit displayMessage(i18n("Cannot insert space in a track with a group"), ErrorMessage);
+        return;
     }
 
-    QRectF r(pos.frames(m_document->fps()), minh, sceneRect().width() - pos.frames(m_document->fps()), maxh);
-    QList<QGraphicsItem *> items = m_scene->items(r);
-
     QList<ItemInfo> clipsToMove;
     QList<ItemInfo> transitionsToMove;
 
@@ -2091,29 +2378,37 @@ void CustomTrackView::insertSpace(QList<ItemInfo> clipsToMove, QList<ItemInfo> t
                 }
                 if (trackClipStartList.value(m_document->tracksCount() - clipsToMove.at(i).track) == -1 || clipsToMove.at(i).startPos.frames(m_document->fps()) < trackClipStartList.value(m_document->tracksCount() - clipsToMove.at(i).track))
                     trackClipStartList[m_document->tracksCount() - clipsToMove.at(i).track] = clipsToMove.at(i).startPos.frames(m_document->fps());
-            } else emit displayMessage(i18n("Cannot move clip at position %1, track %2", m_document->timecode().getTimecodeFromFrames(clipsToMove.at(i).startPos.frames(m_document->fps())), clipsToMove.at(i).track), ErrorMessage);
-        }
+            } else emit {
+                    displayMessage(i18n("Cannot move clip at position %1, track %2", m_document->timecode().getTimecodeFromFrames((clipsToMove.at(i).startPos + offset).frames(m_document->fps())), clipsToMove.at(i).track), ErrorMessage);
+                }
+            }
     if (!transToMove.isEmpty()) for (int i = 0; i < transToMove.count(); i++) {
             transition = getTransitionItemAtStart(transToMove.at(i).startPos + offset, transToMove.at(i).track);
             if (transition) {
-                if (transition->parentItem()) m_selectionGroup->addToGroup(transition->parentItem());
-                m_selectionGroup->addToGroup(transition);
+                if (transition->parentItem()) {
+                    m_selectionGroup->addToGroup(transition->parentItem());
+                    transition->parentItem()->setFlags(QGraphicsItem::ItemIsSelectable);
+                } else {
+                    m_selectionGroup->addToGroup(transition);
+                    transition->setFlags(QGraphicsItem::ItemIsSelectable);
+                }
                 if (trackTransitionStartList.value(m_document->tracksCount() - transToMove.at(i).track) == -1 || transToMove.at(i).startPos.frames(m_document->fps()) < trackTransitionStartList.value(m_document->tracksCount() - transToMove.at(i).track))
                     trackTransitionStartList[m_document->tracksCount() - transToMove.at(i).track] = transToMove.at(i).startPos.frames(m_document->fps());
-                transition->setFlags(QGraphicsItem::ItemIsSelectable);
             } else emit displayMessage(i18n("Cannot move transition at position %1, track %2", m_document->timecode().getTimecodeFromFrames(transToMove.at(i).startPos.frames(m_document->fps())), transToMove.at(i).track), ErrorMessage);
         }
     m_selectionGroup->translate(diff, 0);
 
     // update items coordinates
-    QList<QGraphicsItem *> itemList = scene()->selectedItems();
+    QList<QGraphicsItem *> itemList = m_selectionGroup->childItems();
+
     for (int i = 0; i < itemList.count(); i++) {
         if (itemList.at(i)->type() == AVWIDGET || itemList.at(i)->type() == TRANSITIONWIDGET) {
             static_cast < AbstractClipItem *>(itemList.at(i))->updateItem();
         } else if (itemList.at(i)->type() == GROUPWIDGET) {
             QList<QGraphicsItem *> children = itemList.at(i)->childItems();
             for (int j = 0; j < children.count(); j++) {
-                static_cast < AbstractClipItem *>(children.at(j))->updateItem();
+                AbstractClipItem * clp = static_cast < AbstractClipItem *>(children.at(j));
+                clp->updateItem();
             }
         }
     }
@@ -2127,7 +2422,6 @@ void CustomTrackView::deleteClip(const QString &clipId)
     resetSelectionGroup();
     QList<QGraphicsItem *> itemList = items();
     QUndoCommand *deleteCommand = new QUndoCommand();
-    deleteCommand->setText(i18n("Delete timeline clips"));
     int count = 0;
     for (int i = 0; i < itemList.count(); i++) {
         if (itemList.at(i)->type() == AVWIDGET) {
@@ -2142,6 +2436,7 @@ void CustomTrackView::deleteClip(const QString &clipId)
             }
         }
     }
+    deleteCommand->setText(i18np("Delete timeline clip", "Delete timeline clips", count));
     if (count == 0) delete deleteCommand;
     else m_commandStack->push(deleteCommand);
 }
@@ -2192,6 +2487,7 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
 {
     if (m_moveOpMode == SEEK) m_moveOpMode = NONE;
     QGraphicsView::mouseReleaseEvent(event);
+    setViewportUpdateMode(QGraphicsView::MinimalViewportUpdate);
     if (m_scrollTimer.isActive()) m_scrollTimer.stop();
     if (event->button() == Qt::MidButton) {
         return;
@@ -2206,18 +2502,20 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
             EditGuideCommand *command = new EditGuideCommand(this, m_dragGuide->position(), m_dragGuide->label(), newPos, m_dragGuide->label(), false);
             m_commandStack->push(command);
             m_dragGuide->updateGuide(GenTime(m_dragGuide->pos().x(), m_document->fps()));
+            qSort(m_guides.begin(), m_guides.end(), sortGuidesList);
             m_document->syncGuides(m_guides);
         }
         m_dragGuide = NULL;
         m_dragItem = NULL;
         return;
-    } else if (m_operationMode == SPACER) {
+    } else if (m_operationMode == SPACER && m_selectionGroup) {
         int track;
         if (event->modifiers() != Qt::ControlModifier) {
             // We are moving all tracks
             track = -1;
         } else track = (int)(mapToScene(m_clickEvent).y() / m_tracksHeight);
-        GenTime timeOffset = GenTime(m_selectionGroup->scenePos().x(), m_document->fps()) - m_selectionGroupInfo.startPos;
+        GenTime timeOffset = GenTime((int)(m_selectionGroup->scenePos().x()), m_document->fps()) - m_selectionGroupInfo.startPos;
+
         if (timeOffset != GenTime()) {
             QList<QGraphicsItem *> items = m_selectionGroup->childItems();
 
@@ -2233,10 +2531,9 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
                 trackTransitionStartList[i] = -1;
             }
 
-            int max = items.count();
-            for (int i = 0; i < max; i++) {
+            for (int i = 0; i < items.count(); i++) {
                 if (items.at(i)->type() == GROUPWIDGET)
-                    items += static_cast <QGraphicsItemGroup *>(items.at(i))->childItems();
+                    items += items.at(i)->childItems();
             }
 
             for (int i = 0; i < items.count(); i++) {
@@ -2266,7 +2563,7 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
         resetSelectionGroup(false);
         m_operationMode = NONE;
     } else if (m_operationMode == RUBBERSELECTION) {
-        kDebug() << "// END RUBBER SELECT";
+        //kDebug() << "// END RUBBER SELECT";
         resetSelectionGroup();
         groupSelectedItems();
         m_operationMode = NONE;
@@ -2291,18 +2588,16 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
                 else if (item->isVideoOnly()) prod = item->baseClip()->videoProducer();
                 else prod = item->baseClip()->producer(m_dragItemInfo.track);
                 bool success = m_document->renderer()->mltMoveClip((int)(m_document->tracksCount() - m_dragItemInfo.track), (int)(m_document->tracksCount() - m_dragItem->track()), (int) m_dragItemInfo.startPos.frames(m_document->fps()), (int)(m_dragItem->startPos().frames(m_document->fps())), prod);
+
                 if (success) {
-                    kDebug() << "// get trans info";
                     int tracknumber = m_document->tracksCount() - item->track() - 1;
                     bool isLocked = m_document->trackInfoAt(tracknumber).isLocked;
                     if (isLocked) item->setItemLocked(true);
-
                     QUndoCommand *moveCommand = new QUndoCommand();
                     moveCommand->setText(i18n("Move clip"));
                     new MoveClipCommand(this, m_dragItemInfo, info, false, moveCommand);
                     // Also move automatic transitions (on lower track)
                     Transition *tr = getTransitionItemAtStart(m_dragItemInfo.startPos, m_dragItemInfo.track);
-                    kDebug() << "// get trans info2";
                     if (tr && tr->isAutomatic()) {
                         ItemInfo trInfo = tr->info();
                         ItemInfo newTrInfo = trInfo;
@@ -2356,6 +2651,8 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
                             ItemInfo trInfo = tr->info();
                             ItemInfo newTrInfo = trInfo;
                             newTrInfo.endPos = m_dragItem->endPos();
+                            kDebug() << "CLIP ENDS AT: " << newTrInfo.endPos.frames(25);
+                            kDebug() << "CLIP STARTS AT: " << newTrInfo.startPos.frames(25);
                             ClipItem * upperClip = getClipItemAt(m_dragItemInfo.startPos, m_dragItemInfo.track - 1);
                             if (!upperClip || !upperClip->baseClip()->isTransparent()) {
                                 if (!getClipItemAtStart(trInfo.startPos, tr->track())) {
@@ -2375,7 +2672,7 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
                     KdenliveSettings::setSnaptopoints(snap);
                     emit displayMessage(i18n("Cannot move clip to position %1", m_document->timecode().getTimecodeFromFrames(m_dragItemInfo.startPos.frames(m_document->fps()))), ErrorMessage);
                 }
-                m_document->setModified(true);
+                setDocumentModified();
             }
             if (m_dragItem->type() == TRANSITIONWIDGET && (m_dragItemInfo.startPos != info.startPos || m_dragItemInfo.track != info.track)) {
                 Transition *transition = static_cast <Transition *>(m_dragItem);
@@ -2411,7 +2708,7 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
                         items += items.at(i)->childItems();
                     }
                 }
-
+                m_document->renderer()->blockSignals(true);
                 for (int i = 0; i < items.count(); i++) {
                     if (items.at(i)->type() != AVWIDGET && items.at(i)->type() != TRANSITIONWIDGET) continue;
                     AbstractClipItem *item = static_cast <AbstractClipItem *>(items.at(i));
@@ -2429,7 +2726,7 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
                         m_document->renderer()->mltDeleteTransition(tr->transitionTag(), tr->transitionEndTrack(), m_document->tracksCount() - info.track, info.startPos, info.endPos, tr->toXML());
                     }
                 }
-
+                m_document->renderer()->blockSignals(false);
                 for (int i = 0; i < items.count(); i++) {
                     // re-add items in correct place
                     if (items.at(i)->type() != AVWIDGET && items.at(i)->type() != TRANSITIONWIDGET) continue;
@@ -2477,10 +2774,10 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
                     m_selectionGroupInfo.startPos = GenTime(m_selectionGroup->scenePos().x(), m_document->fps());
                     m_selectionGroupInfo.track = m_selectionGroup->track();
                 }
-                m_document->setModified(true);
+                setDocumentModified();
             }
         }
-
+        m_document->renderer()->doRefresh();
     } else if (m_operationMode == RESIZESTART && m_dragItem->startPos() != m_dragItemInfo.startPos) {
         // resize start
         if (m_dragItem->type() == AVWIDGET) {
@@ -2511,8 +2808,40 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
                         new MoveTransitionCommand(this, trInfo, newTrInfo, true, resizeCommand);
                     }
                 }
-                updateClipFade(static_cast <ClipItem *>(m_dragItem));
-                new ResizeClipCommand(this, m_dragItemInfo, info, false, resizeCommand);
+
+                ClipItem *clip = static_cast < ClipItem * >(m_dragItem);
+                updateClipFade(clip);
+
+                // check keyframes
+                QDomDocument doc;
+                QDomElement root = doc.createElement("list");
+                doc.appendChild(root);
+                QList <int> indexes;
+                for (int i = 0; i < clip->effectsCount(); i++) {
+                    QDomElement effect = clip->effectAt(i);
+                    if (EffectsList::hasKeyFrames(effect)) {
+                        doc.appendChild(doc.importNode(effect, true));
+                        indexes.append(i);
+                    }
+                }
+
+                if (clip->checkEffectsKeyframesPos(m_dragItemInfo.cropStart.frames(m_document->fps()), clip->cropStart().frames(m_document->fps()), true)) {
+                    // Keyframes were modified, updateClip
+                    QDomNodeList effs = doc.elementsByTagName("effect");
+                    // Hack:
+                    // Since we must always resize clip before updating the keyframes, we
+                    // put a resize command before & after checking keyframes so that
+                    // we are sure the resize is performed before whenever we do or undo the action
+
+                    new ResizeClipCommand(this, m_dragItemInfo, info, false, true, resizeCommand);
+                    for (int i = 0; i < indexes.count(); i++) {
+                        new EditEffectCommand(this, m_document->tracksCount() - clip->track(), clip->startPos(), effs.at(i).cloneNode().toElement(), clip->effectAt(indexes.at(i)), indexes.at(i), false, resizeCommand);
+                        updateEffect(m_document->tracksCount() - clip->track(), clip->startPos(), clip->effectAt(indexes.at(i)), indexes.at(i));
+                    }
+                    new ResizeClipCommand(this, m_dragItemInfo, info, false, true, resizeCommand);
+                    emit clipItemSelected(clip);
+                } else new ResizeClipCommand(this, m_dragItemInfo, info, false, false, resizeCommand);
+
                 m_commandStack->push(resizeCommand);
             } else {
                 m_dragItem->resizeStart((int) m_dragItemInfo.startPos.frames(m_document->fps()));
@@ -2573,9 +2902,39 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
                     }
                 }
 
-                new ResizeClipCommand(this, m_dragItemInfo, info, false, resizeCommand);
+                // check keyframes
+                ClipItem *clip = static_cast < ClipItem * >(m_dragItem);
+                QDomDocument doc;
+                QDomElement root = doc.createElement("list");
+                doc.appendChild(root);
+                QList <int> indexes;
+                for (int i = 0; i < clip->effectsCount(); i++) {
+                    QDomElement effect = clip->effectAt(i);
+                    if (EffectsList::hasKeyFrames(effect)) {
+                        doc.appendChild(doc.importNode(effect, true));
+                        indexes.append(i);
+                    }
+                }
+
+                if (clip->checkEffectsKeyframesPos((m_dragItemInfo.cropStart + m_dragItemInfo.endPos - m_dragItemInfo.startPos).frames(m_document->fps()) - 1, (clip->cropStart() + clip->cropDuration()).frames(m_document->fps()) - 1, false)) {
+                    // Keyframes were modified, updateClip
+                    QDomNodeList effs = doc.elementsByTagName("effect");
+                    // Hack:
+                    // Since we must always resize clip before updating the keyframes, we
+                    // put a resize command before & after checking keyframes so that
+                    // we are sure the resize is performed before whenever we do or undo the action
+
+                    new ResizeClipCommand(this, m_dragItemInfo, info, false, true, resizeCommand);
+                    for (int i = 0; i < indexes.count(); i++) {
+                        new EditEffectCommand(this, m_document->tracksCount() - clip->track(), clip->startPos(), effs.at(i).cloneNode().toElement(), clip->effectAt(indexes.at(i)), indexes.at(i), false, resizeCommand);
+                        updateEffect(m_document->tracksCount() - clip->track(), clip->startPos(), clip->effectAt(indexes.at(i)), indexes.at(i));
+                    }
+                    new ResizeClipCommand(this, m_dragItemInfo, info, false, true, resizeCommand);
+                    emit clipItemSelected(clip);
+                } else new ResizeClipCommand(this, m_dragItemInfo, info, false, false, resizeCommand);
+
                 m_commandStack->push(resizeCommand);
-                updateClipFade(static_cast <ClipItem *>(m_dragItem), true);
+                updateClipFade(clip);
             } else {
                 m_dragItem->resizeEnd((int) m_dragItemInfo.endPos.frames(m_document->fps()));
                 emit displayMessage(i18n("Error when resizing clip"), ErrorMessage);
@@ -2605,7 +2964,7 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
         //m_document->renderer()->doRefresh();
     } else if (m_operationMode == FADEIN) {
         // resize fade in effect
-        ClipItem * item = (ClipItem *) m_dragItem;
+        ClipItem * item = static_cast <ClipItem *>(m_dragItem);
         int ix = item->hasEffect("volume", "fadein");
         if (ix != -1) {
             QDomElement oldeffect = item->effectAt(ix);
@@ -2644,11 +3003,11 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
         }
     } else if (m_operationMode == FADEOUT) {
         // resize fade in effect
-        ClipItem * item = (ClipItem *) m_dragItem;
+        ClipItem * item = static_cast <ClipItem *>(m_dragItem);
         int ix = item->hasEffect("volume", "fadeout");
         if (ix != -1) {
             QDomElement oldeffect = item->effectAt(ix);
-            int end = (item->duration() + item->cropStart()).frames(m_document->fps());
+            int end = (item->cropDuration() + item->cropStart()).frames(m_document->fps());
             int start = item->fadeOut();
             if (start == 0) {
                 slotDeleteEffect(item, oldeffect);
@@ -2670,7 +3029,7 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
         ix = item->hasEffect("brightness", "fade_to_black");
         if (ix != -1) {
             QDomElement oldeffect = item->effectAt(ix);
-            int end = (item->duration() + item->cropStart()).frames(m_document->fps());
+            int end = (item->cropDuration() + item->cropStart()).frames(m_document->fps());
             int start = item->fadeOut();
             if (start == 0) {
                 slotDeleteEffect(item, oldeffect);
@@ -2686,13 +3045,14 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
         }
     } else if (m_operationMode == KEYFRAME) {
         // update the MLT effect
-        ClipItem * item = (ClipItem *) m_dragItem;
+        ClipItem * item = static_cast <ClipItem *>(m_dragItem);
         QString previous = item->keyframes(item->selectedEffectIndex());
         item->updateKeyframeEffect();
         QString next = item->keyframes(item->selectedEffectIndex());
         EditKeyFrameCommand *command = new EditKeyFrameCommand(this, item->track(), item->startPos(), item->selectedEffectIndex(), previous, next, false);
         m_commandStack->push(command);
         updateEffect(m_document->tracksCount() - item->track(), item->startPos(), item->selectedEffect(), item->selectedEffectIndex());
+        emit clipItemSelected(item, item->selectedEffectIndex());
     }
     if (m_dragItem && m_dragItem->type() == TRANSITIONWIDGET && m_dragItem->isSelected()) {
         // A transition is selected
@@ -2700,18 +3060,19 @@ void CustomTrackView::mouseReleaseEvent(QMouseEvent * event)
         ClipItem *transitionClip = getClipItemAt(m_dragItemInfo.startPos, m_dragItemInfo.track);
         if (transitionClip && transitionClip->baseClip()) {
             QString size = transitionClip->baseClip()->getProperty("frame_size");
-            p.setX(size.section('x', 0, 0).toInt());
+            double factor = transitionClip->baseClip()->getProperty("aspect_ratio").toDouble();
+            p.setX((int)(size.section('x', 0, 0).toInt() * factor + 0.5));
             p.setY(size.section('x', 1, 1).toInt());
         }
         emit transitionItemSelected(static_cast <Transition *>(m_dragItem), getPreviousVideoTrack(m_dragItem->track()), p);
     } else emit transitionItemSelected(NULL);
-    if (m_operationMode != NONE && m_operationMode != MOVE) m_document->setModified(true);
+    if (m_operationMode != NONE && m_operationMode != MOVE) setDocumentModified();
     m_operationMode = NONE;
 }
 
-void CustomTrackView::deleteClip(ItemInfo info)
+void CustomTrackView::deleteClip(ItemInfo info, bool refresh)
 {
-    ClipItem *item = getClipItemAt((int) info.startPos.frames(m_document->fps()) + 1, info.track);
+    ClipItem *item = getClipItemAt((int) info.startPos.frames(m_document->fps()), info.track);
 
     if (!item || m_document->renderer()->mltRemoveClip(m_document->tracksCount() - info.track, info.startPos) == false) {
         emit displayMessage(i18n("Error removing clip at %1 on track %2", m_document->timecode().getTimecodeFromFrames(info.startPos.frames(m_document->fps())), info.track), ErrorMessage);
@@ -2730,11 +3091,13 @@ void CustomTrackView::deleteClip(ItemInfo info)
             delete tr;
         }
     }*/
-    scene()->removeItem(item);
+    m_waitingThumbs.removeAll(item);
     if (m_dragItem == item) m_dragItem = NULL;
+    scene()->removeItem(item);
     delete item;
-    m_document->setModified(true);
-    m_document->renderer()->doRefresh();
+    item = NULL;
+    setDocumentModified();
+    if (refresh) m_document->renderer()->doRefresh();
 }
 
 void CustomTrackView::deleteSelectedClips()
@@ -2747,12 +3110,15 @@ void CustomTrackView::deleteSelectedClips()
     }
     scene()->clearSelection();
     QUndoCommand *deleteSelected = new QUndoCommand();
-    deleteSelected->setText(i18n("Delete selected items"));
-    bool resetGroup = false;
 
+    bool resetGroup = false;
+    int groupCount = 0;
+    int clipCount = 0;
+    int transitionCount = 0;
     // expand & destroy groups
     for (int i = 0; i < itemList.count(); i++) {
         if (itemList.at(i)->type() == GROUPWIDGET) {
+            groupCount++;
             QList<QGraphicsItem *> children = itemList.at(i)->childItems();
             itemList += children;
             QList <ItemInfo> clipInfos;
@@ -2775,18 +3141,28 @@ void CustomTrackView::deleteSelectedClips()
 
     for (int i = 0; i < itemList.count(); i++) {
         if (itemList.at(i)->type() == AVWIDGET) {
+            clipCount++;
             ClipItem *item = static_cast <ClipItem *>(itemList.at(i));
             if (item->parentItem()) resetGroup = true;
+            //kDebug()<<"// DELETE CLP AT: "<<item->info().startPos.frames(25);
             new AddTimelineClipCommand(this, item->xml(), item->clipProducer(), item->info(), item->effectList(), true, true, deleteSelected);
             emit clipItemSelected(NULL);
         } else if (itemList.at(i)->type() == TRANSITIONWIDGET) {
+            transitionCount++;
             Transition *item = static_cast <Transition *>(itemList.at(i));
+            //kDebug()<<"// DELETE TRANS AT: "<<item->info().startPos.frames(25);
             if (item->parentItem()) resetGroup = true;
             new AddTransitionCommand(this, item->info(), item->transitionEndTrack(), item->toXML(), true, true, deleteSelected);
             emit transitionItemSelected(NULL);
         }
     }
-
+    if (groupCount > 0 && clipCount == 0 && transitionCount == 0)
+        deleteSelected->setText(i18np("Delete selected group", "Delete selected groups", groupCount));
+    else if (clipCount > 0 && groupCount == 0 && transitionCount == 0)
+        deleteSelected->setText(i18np("Delete selected clip", "Delete selected clips", clipCount));
+    else if (transitionCount > 0 && groupCount == 0 && clipCount == 0)
+        deleteSelected->setText(i18np("Delete selected transition", "Delete selected transitions", transitionCount));
+    else deleteSelected->setText(i18n("Delete selected items"));
     m_commandStack->push(deleteSelected);
 }
 
@@ -2811,7 +3187,7 @@ void CustomTrackView::changeClipSpeed()
             double speed = (double) percent / 100.0;
             if (item->speed() != speed && (item->clipType() == VIDEO || item->clipType() == AV)) {
                 count++;
-                new ChangeSpeedCommand(this, info, item->speed(), speed, item->clipProducer(), changeSelected);
+                //new ChangeSpeedCommand(this, info, item->speed(), speed, item->clipProducer(), changeSelected);
             }
         }
     }
@@ -2819,23 +3195,24 @@ void CustomTrackView::changeClipSpeed()
     else delete changeSelected;
 }
 
-void CustomTrackView::doChangeClipSpeed(ItemInfo info, const double speed, const double oldspeed, const QString &id)
+void CustomTrackView::doChangeClipSpeed(ItemInfo info, const double speed, const double oldspeed, int strobe, const QString &id)
 {
     DocClipBase *baseclip = m_document->clipManager()->getClipById(id);
-    ClipItem *item = getClipItemAt((int) info.startPos.frames(m_document->fps()) + 1, info.track);
+    ClipItem *item = getClipItemAt((int) info.startPos.frames(m_document->fps()), info.track);
     if (!item) {
         kDebug() << "ERROR: Cannot find clip for speed change";
         emit displayMessage(i18n("Cannot find clip for speed change"), ErrorMessage);
         return;
     }
     info.track = m_document->tracksCount() - item->track();
-    int endPos = m_document->renderer()->mltChangeClipSpeed(info, speed, oldspeed, baseclip->producer());
+    int endPos = m_document->renderer()->mltChangeClipSpeed(info, speed, oldspeed, strobe, baseclip->producer());
     if (endPos >= 0) {
-        item->setSpeed(speed);
+        item->setSpeed(speed, strobe);
         item->updateRectGeometry();
         if (item->cropDuration().frames(m_document->fps()) > endPos)
             item->AbstractClipItem::resizeEnd(info.startPos.frames(m_document->fps()) + endPos, speed);
-        m_document->setModified(true);
+        updateClipFade(item);
+        setDocumentModified();
     } else emit displayMessage(i18n("Invalid clip"), ErrorMessage);
 }
 
@@ -2911,7 +3288,7 @@ void CustomTrackView::doGroupClips(QList <ItemInfo> clipInfos, QList <ItemInfo>
             }
             tr->setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
         }
-        m_document->setModified(true);
+        setDocumentModified();
         return;
     }
 
@@ -2930,17 +3307,17 @@ void CustomTrackView::doGroupClips(QList <ItemInfo> clipInfos, QList <ItemInfo>
     }
 
     groupSelectedItems(false, true);
-    m_document->setModified(true);
+    setDocumentModified();
 }
 
-void CustomTrackView::addClip(QDomElement xml, const QString &clipId, ItemInfo info, EffectsList effects)
+void CustomTrackView::addClip(QDomElement xml, const QString &clipId, ItemInfo info, EffectsList effects, bool refresh)
 {
     DocClipBase *baseclip = m_document->clipManager()->getClipById(clipId);
     if (baseclip == NULL) {
         emit displayMessage(i18n("No clip copied"), ErrorMessage);
         return;
     }
-    ClipItem *item = new ClipItem(baseclip, info, m_document->fps(), xml.attribute("speed", "1").toDouble());
+    ClipItem *item = new ClipItem(baseclip, info, m_document->fps(), xml.attribute("speed", "1").toDouble(), xml.attribute("strobe", "1").toInt());
     item->setEffectList(effects);
     if (xml.hasAttribute("audio_only")) item->setAudioOnly(true);
     else if (xml.hasAttribute("video_only")) item->setVideoOnly(true);
@@ -2961,11 +3338,13 @@ void CustomTrackView::addClip(QDomElement xml, const QString &clipId, ItemInfo i
     for (int i = 0; i < item->effectsCount(); i++) {
         m_document->renderer()->mltAddEffect(info.track, info.startPos, item->getEffectArgs(item->effectAt(i)), false);
     }
-    m_document->setModified(true);
-    m_document->renderer()->doRefresh();
+    setDocumentModified();
+    if (refresh) m_document->renderer()->doRefresh();
+    m_waitingThumbs.append(item);
+    m_thumbsTimer.start();
 }
 
-void CustomTrackView::slotUpdateClip(const QString &clipId)
+void CustomTrackView::slotUpdateClip(const QString &clipId, bool reload)
 {
     QList<QGraphicsItem *> list = scene()->items();
     ClipItem *clip = NULL;
@@ -2975,7 +3354,7 @@ void CustomTrackView::slotUpdateClip(const QString &clipId)
             if (clip->clipProducer() == clipId) {
                 ItemInfo info = clip->info();
                 info.track = m_document->tracksCount() - clip->track();
-                m_document->renderer()->mltUpdateClip(info, clip->xml(), clip->baseClip()->producer());
+                if (reload) m_document->renderer()->mltUpdateClip(info, clip->xml(), clip->baseClip()->producer());
                 clip->refreshClip(true);
                 clip->update();
             }
@@ -3014,7 +3393,8 @@ ClipItem *CustomTrackView::getClipItemAtStart(GenTime pos, int track)
 
 ClipItem *CustomTrackView::getClipItemAt(int pos, int track)
 {
-    QList<QGraphicsItem *> list = scene()->items(QPointF(pos, track * m_tracksHeight + m_tracksHeight / 2));
+    const QPointF p(pos, track * m_tracksHeight + m_tracksHeight / 2);
+    QList<QGraphicsItem *> list = scene()->items(p);
     ClipItem *clip = NULL;
     for (int i = 0; i < list.size(); i++) {
         if (list.at(i)->type() == AVWIDGET) {
@@ -3027,13 +3407,13 @@ ClipItem *CustomTrackView::getClipItemAt(int pos, int track)
 
 ClipItem *CustomTrackView::getClipItemAt(GenTime pos, int track)
 {
-    int framepos = (int)(pos.frames(m_document->fps()));
-    return getClipItemAt(framepos, track);
+    return getClipItemAt((int) pos.frames(m_document->fps()), track);
 }
 
 Transition *CustomTrackView::getTransitionItemAt(int pos, int track)
 {
-    QList<QGraphicsItem *> list = scene()->items(QPointF(pos, (track + 1) * m_tracksHeight));
+    const QPointF p(pos, (track + 1) * m_tracksHeight);
+    QList<QGraphicsItem *> list = scene()->items(p);
     Transition *clip = NULL;
     for (int i = 0; i < list.size(); i++) {
         if (list.at(i)->type() == TRANSITIONWIDGET) {
@@ -3052,7 +3432,8 @@ Transition *CustomTrackView::getTransitionItemAt(GenTime pos, int track)
 Transition *CustomTrackView::getTransitionItemAtEnd(GenTime pos, int track)
 {
     int framepos = (int)(pos.frames(m_document->fps()));
-    QList<QGraphicsItem *> list = scene()->items(QPointF(framepos - 1, (track + 1) * m_tracksHeight));
+    const QPointF p(framepos - 1, (track + 1) * m_tracksHeight);
+    QList<QGraphicsItem *> list = scene()->items(p);
     Transition *clip = NULL;
     for (int i = 0; i < list.size(); i++) {
         if (list.at(i)->type() == TRANSITIONWIDGET) {
@@ -3066,7 +3447,8 @@ Transition *CustomTrackView::getTransitionItemAtEnd(GenTime pos, int track)
 
 Transition *CustomTrackView::getTransitionItemAtStart(GenTime pos, int track)
 {
-    QList<QGraphicsItem *> list = scene()->items(QPointF(pos.frames(m_document->fps()), (track + 1) * m_tracksHeight));
+    const QPointF p(pos.frames(m_document->fps()), (track + 1) * m_tracksHeight);
+    QList<QGraphicsItem *> list = scene()->items(p);
     Transition *clip = NULL;
     for (int i = 0; i < list.size(); ++i) {
         if (list.at(i)->type() == TRANSITIONWIDGET) {
@@ -3078,10 +3460,10 @@ Transition *CustomTrackView::getTransitionItemAtStart(GenTime pos, int track)
     return clip;
 }
 
-void CustomTrackView::moveClip(const ItemInfo start, const ItemInfo end)
+void CustomTrackView::moveClip(const ItemInfo start, const ItemInfo end, bool refresh)
 {
     if (m_selectionGroup) resetSelectionGroup(false);
-    ClipItem *item = getClipItemAt((int) start.startPos.frames(m_document->fps()) + 1, start.track);
+    ClipItem *item = getClipItemAt((int) start.startPos.frames(m_document->fps()), start.track);
     if (!item) {
         emit displayMessage(i18n("Cannot move clip at time: %1 on track %2", m_document->timecode().getTimecodeFromFrames(start.startPos.frames(m_document->fps())), start.track), ErrorMessage);
         kDebug() << "----------------  ERROR, CANNOT find clip to move at.. ";
@@ -3116,12 +3498,13 @@ void CustomTrackView::moveClip(const ItemInfo start, const ItemInfo end)
             }
         }
         KdenliveSettings::setSnaptopoints(snap);
-        m_document->setModified(true);
+        setDocumentModified();
     } else {
         // undo last move and emit error message
         emit displayMessage(i18n("Cannot move clip to position %1", m_document->timecode().getTimecodeFromFrames(end.startPos.frames(m_document->fps()))), ErrorMessage);
     }
-    kDebug() << " // MOVED CLIP TO: " << end.startPos.frames(25) << ", ITEM START: " << item->startPos().frames(25);
+    if (refresh) m_document->renderer()->doRefresh();
+    //kDebug() << " // MOVED CLIP TO: " << end.startPos.frames(25) << ", ITEM START: " << item->startPos().frames(25);
 }
 
 void CustomTrackView::moveGroup(QList <ItemInfo> startClip, QList <ItemInfo> startTransition, const GenTime offset, const int trackOffset, bool reverseMove)
@@ -3132,6 +3515,10 @@ void CustomTrackView::moveGroup(QList <ItemInfo> startClip, QList <ItemInfo> sta
     resetSelectionGroup();
     m_scene->clearSelection();
 
+    m_selectionGroup = new AbstractGroupItem(m_document->fps());
+    scene()->addItem(m_selectionGroup);
+
+    m_document->renderer()->blockSignals(true);
     for (int i = 0; i < startClip.count(); i++) {
         if (reverseMove) {
             startClip[i].startPos = startClip.at(i).startPos - offset;
@@ -3141,8 +3528,13 @@ void CustomTrackView::moveGroup(QList <ItemInfo> startClip, QList <ItemInfo> sta
         ClipItem *clip = getClipItemAt(startClip.at(i).startPos, startClip.at(i).track);
         if (clip) {
             clip->setItemLocked(false);
-            if (clip->parentItem()) clip->parentItem()->setSelected(true);
-            else clip->setSelected(true);
+            if (clip->parentItem()) {
+                m_selectionGroup->addToGroup(clip->parentItem());
+                clip->parentItem()->setFlags(QGraphicsItem::ItemIsSelectable);
+            } else {
+                m_selectionGroup->addToGroup(clip);
+                clip->setFlags(QGraphicsItem::ItemIsSelectable);
+            }
             m_document->renderer()->mltRemoveClip(m_document->tracksCount() - startClip.at(i).track, startClip.at(i).startPos);
         } else kDebug() << "//MISSING CLIP AT: " << startClip.at(i).startPos.frames(25);
     }
@@ -3154,19 +3546,24 @@ void CustomTrackView::moveGroup(QList <ItemInfo> startClip, QList <ItemInfo> sta
         Transition *tr = getTransitionItemAt(startTransition.at(i).startPos, startTransition.at(i).track);
         if (tr) {
             tr->setItemLocked(false);
-            if (tr->parentItem()) tr->parentItem()->setSelected(true);
-            else tr->setSelected(true);
+            if (tr->parentItem()) {
+                m_selectionGroup->addToGroup(tr->parentItem());
+                tr->parentItem()->setFlags(QGraphicsItem::ItemIsSelectable);
+            } else {
+                m_selectionGroup->addToGroup(tr);
+                tr->setFlags(QGraphicsItem::ItemIsSelectable);
+            }
             m_document->renderer()->mltDeleteTransition(tr->transitionTag(), tr->transitionEndTrack(), m_document->tracksCount() - startTransition.at(i).track, startTransition.at(i).startPos, startTransition.at(i).endPos, tr->toXML());
         } else kDebug() << "//MISSING TRANSITION AT: " << startTransition.at(i).startPos.frames(25);
     }
-    groupSelectedItems(true);
+    m_document->renderer()->blockSignals(false);
+
     if (m_selectionGroup) {
         bool snap = KdenliveSettings::snaptopoints();
         KdenliveSettings::setSnaptopoints(false);
 
-        m_selectionGroup->moveBy(offset.frames(m_document->fps()), trackOffset * (qreal) m_tracksHeight);
-
-        kDebug() << "%% GRP NEW POS: " << m_selectionGroup->scenePos().x();
+        m_selectionGroup->translate(offset.frames(m_document->fps()), trackOffset *(qreal) m_tracksHeight);
+        //m_selectionGroup->moveBy(offset.frames(m_document->fps()), trackOffset *(qreal) m_tracksHeight);
 
         QList<QGraphicsItem *> children = m_selectionGroup->childItems();
         // Expand groups
@@ -3174,9 +3571,14 @@ void CustomTrackView::moveGroup(QList <ItemInfo> startClip, QList <ItemInfo> sta
         for (int i = 0; i < max; i++) {
             if (children.at(i)->type() == GROUPWIDGET) {
                 children += children.at(i)->childItems();
+                AbstractGroupItem *grp = static_cast<AbstractGroupItem *>(children.at(i));
+                //grp->moveBy(offset.frames(m_document->fps()), trackOffset *(qreal) m_tracksHeight);
+                /*m_document->clipManager()->removeGroup(grp);
+                m_scene->destroyItemGroup(grp);*/
+                children.removeAll(children.at(i));
+                i--;
             }
         }
-        kDebug() << "// GRP MOVE; FOUND CHILDREN:" << children.count();
 
         for (int i = 0; i < children.count(); i++) {
             // re-add items in correct place
@@ -3211,11 +3613,13 @@ void CustomTrackView::moveGroup(QList <ItemInfo> startClip, QList <ItemInfo> sta
                 m_document->renderer()->mltAddTransition(tr->transitionTag(), newTrack, m_document->tracksCount() - info.track, info.startPos, info.endPos, tr->toXML());
             }
         }
+        resetSelectionGroup(false);
         KdenliveSettings::setSnaptopoints(snap);
+        m_document->renderer()->doRefresh();
     } else kDebug() << "///////// WARNING; NO GROUP TO MOVE";
 }
 
-void CustomTrackView::moveTransition(const ItemInfo start, const ItemInfo end)
+void CustomTrackView::moveTransition(const ItemInfo start, const ItemInfo end, bool m_refresh)
 {
     Transition *item = getTransitionItemAt(start.startPos, start.track);
     if (!item) {
@@ -3235,6 +3639,7 @@ void CustomTrackView::moveTransition(const ItemInfo start, const ItemInfo end)
         item->resizeStart((int) end.startPos.frames(m_document->fps()));
     } else if (end.startPos == start.startPos) {
         // Transition end resize;
+        kDebug() << "// resize END: " << end.endPos.frames(m_document->fps());
         item->resizeEnd((int) end.endPos.frames(m_document->fps()));
     } else {
         // Move & resize
@@ -3251,21 +3656,21 @@ void CustomTrackView::moveTransition(const ItemInfo start, const ItemInfo end)
         ClipItem *transitionClip = getClipItemAt(item->startPos(), item->track());
         if (transitionClip && transitionClip->baseClip()) {
             QString size = transitionClip->baseClip()->getProperty("frame_size");
-            p.setX(size.section('x', 0, 0).toInt());
+            double factor = transitionClip->baseClip()->getProperty("aspect_ratio").toDouble();
+            p.setX((int)(size.section('x', 0, 0).toInt() * factor + 0.5));
             p.setY(size.section('x', 1, 1).toInt());
         }
         emit transitionItemSelected(item, getPreviousVideoTrack(item->track()), p);
     }
+    if (m_refresh) m_document->renderer()->doRefresh();
 }
 
-void CustomTrackView::resizeClip(const ItemInfo start, const ItemInfo end)
+void CustomTrackView::resizeClip(const ItemInfo start, const ItemInfo end, bool dontWorry)
 {
-    bool resizeClipStart = true;
-    if (start.startPos == end.startPos) resizeClipStart = false;
-    /*if (resizeClipStart) offset = 1;
-    else offset = -1;*/
-    ClipItem *item = getClipItemAt((int)(start.startPos.frames(m_document->fps())), start.track);
+    bool resizeClipStart = (start.startPos != end.startPos);
+    ClipItem *item = getClipItemAtStart(start.startPos, start.track);
     if (!item) {
+        if (dontWorry) return;
         emit displayMessage(i18n("Cannot move clip at time: %1 on track %2", m_document->timecode().getTimecodeFromFrames(start.startPos.frames(m_document->fps())), start.track), ErrorMessage);
         kDebug() << "----------------  ERROR, CANNOT find clip to resize at... "; // << startPos;
         return;
@@ -3274,119 +3679,121 @@ void CustomTrackView::resizeClip(const ItemInfo start, const ItemInfo end)
         // Item is part of a group, reset group
         resetSelectionGroup();
     }
+
     bool snap = KdenliveSettings::snaptopoints();
     KdenliveSettings::setSnaptopoints(false);
-    if (resizeClipStart && start.startPos != end.startPos) {
+    if (resizeClipStart) {
         ItemInfo clipinfo = item->info();
         clipinfo.track = m_document->tracksCount() - clipinfo.track;
-        bool success = m_document->renderer()->mltResizeClipStart(clipinfo, end.startPos - item->startPos());
+        bool success = m_document->renderer()->mltResizeClipStart(clipinfo, end.startPos - clipinfo.startPos);
         if (success) {
             kDebug() << "RESIZE CLP STRAT TO:" << end.startPos.frames(m_document->fps()) << ", OLD ST: " << start.startPos.frames(25);
             item->resizeStart((int) end.startPos.frames(m_document->fps()));
             updateClipFade(item);
         } else emit displayMessage(i18n("Error when resizing clip"), ErrorMessage);
-    } else if (!resizeClipStart) {
+    } else {
         ItemInfo clipinfo = item->info();
         clipinfo.track = m_document->tracksCount() - clipinfo.track;
         bool success = m_document->renderer()->mltResizeClipEnd(clipinfo, end.endPos - clipinfo.startPos);
         if (success) {
             item->resizeEnd((int) end.endPos.frames(m_document->fps()));
-            updateClipFade(item, true);
+            updateClipFade(item);
         } else emit displayMessage(i18n("Error when resizing clip"), ErrorMessage);
     }
-    if (end.cropStart != start.cropStart) {
+    if (!resizeClipStart && end.cropStart != start.cropStart) {
         kDebug() << "// RESIZE CROP, DIFF: " << (end.cropStart - start.cropStart).frames(25);
         ItemInfo clipinfo = end;
         clipinfo.track = m_document->tracksCount() - end.track;
         bool success = m_document->renderer()->mltResizeClipCrop(clipinfo, end.cropStart - start.cropStart);
         if (success) {
             item->setCropStart(end.cropStart);
-            item->resetThumbs();
+            item->resetThumbs(true);
         }
     }
     m_document->renderer()->doRefresh();
     KdenliveSettings::setSnaptopoints(snap);
 }
 
-void CustomTrackView::updateClipFade(ClipItem * item, bool updateFadeOut)
-{
-    if (!updateFadeOut) {
-        int end = item->fadeIn();
-        if (end != 0) {
-            // there is a fade in effect
-            int effectPos = item->hasEffect("volume", "fadein");
-            if (effectPos != -1) {
-                QDomElement oldeffect = item->effectAt(effectPos);
-                int start = item->cropStart().frames(m_document->fps());
-                int max = item->cropDuration().frames(m_document->fps());
-                if (end > max) {
-                    item->setFadeIn(max);
-                    end = item->fadeIn();
-                }
-                end += start;
-                EffectsList::setParameter(oldeffect, "in", QString::number(start));
-                EffectsList::setParameter(oldeffect, "out", QString::number(end));
-                if (!m_document->renderer()->mltEditEffect(m_document->tracksCount() - item->track(), item->startPos(), item->getEffectArgs(oldeffect)))
-                    emit displayMessage(i18n("Problem editing effect"), ErrorMessage);
-                // if fade effect is displayed, update the effect edit widget with new clip duration
-                if (item->isSelected() && effectPos == item->selectedEffectIndex()) emit clipItemSelected(item, effectPos);
+void CustomTrackView::updateClipFade(ClipItem * item)
+{
+    int end = item->fadeIn();
+    if (end != 0) {
+        // there is a fade in effect
+        int effectPos = item->hasEffect("volume", "fadein");
+        if (effectPos != -1) {
+            QDomElement oldeffect = item->effectAt(effectPos);
+            int start = item->cropStart().frames(m_document->fps());
+            int max = item->cropDuration().frames(m_document->fps());
+            if (end > max) {
+                // Make sure the fade effect is not longer than the clip
+                item->setFadeIn(max);
+                end = item->fadeIn();
             }
-            effectPos = item->hasEffect("brightness", "fade_from_black");
-            if (effectPos != -1) {
-                QDomElement oldeffect = item->effectAt(effectPos);
-                int start = item->cropStart().frames(m_document->fps());
-                int max = item->cropDuration().frames(m_document->fps());
-                if (end > max) {
-                    item->setFadeIn(max);
-                    end = item->fadeIn();
-                }
-                end += start;
-                EffectsList::setParameter(oldeffect, "in", QString::number(start));
-                EffectsList::setParameter(oldeffect, "out", QString::number(end));
-                if (!m_document->renderer()->mltEditEffect(m_document->tracksCount() - item->track(), item->startPos(), item->getEffectArgs(oldeffect)))
-                    emit displayMessage(i18n("Problem editing effect"), ErrorMessage);
-                // if fade effect is displayed, update the effect edit widget with new clip duration
-                if (item->isSelected() && effectPos == item->selectedEffectIndex()) emit clipItemSelected(item, effectPos);
+            end += start;
+            EffectsList::setParameter(oldeffect, "in", QString::number(start));
+            EffectsList::setParameter(oldeffect, "out", QString::number(end));
+            if (!m_document->renderer()->mltEditEffect(m_document->tracksCount() - item->track(), item->startPos(), item->getEffectArgs(oldeffect)))
+                emit displayMessage(i18n("Problem editing effect"), ErrorMessage);
+            // if fade effect is displayed, update the effect edit widget with new clip duration
+            if (item->isSelected() && effectPos == item->selectedEffectIndex()) emit clipItemSelected(item, effectPos);
+        }
+        effectPos = item->hasEffect("brightness", "fade_from_black");
+        if (effectPos != -1) {
+            QDomElement oldeffect = item->effectAt(effectPos);
+            int start = item->cropStart().frames(m_document->fps());
+            int max = item->cropDuration().frames(m_document->fps());
+            if (end > max) {
+                // Make sure the fade effect is not longer than the clip
+                item->setFadeIn(max);
+                end = item->fadeIn();
             }
-        }
-    } else {
-        int start = item->fadeOut();
-        if (start != 0) {
-            // there is a fade in effect
-            int effectPos = item->hasEffect("volume", "fadeout");
-            if (effectPos != -1) {
-                QDomElement oldeffect = item->effectAt(effectPos);
-                int end = (item->duration() - item->cropStart()).frames(m_document->fps());
-                int max = item->cropDuration().frames(m_document->fps());
-                if (end > max) {
-                    item->setFadeOut(max);
-                    start = item->fadeOut();
-                }
-                start = end - start;
-                EffectsList::setParameter(oldeffect, "in", QString::number(start));
-                EffectsList::setParameter(oldeffect, "out", QString::number(end));
-                if (!m_document->renderer()->mltEditEffect(m_document->tracksCount() - item->track(), item->startPos(), item->getEffectArgs(oldeffect)))
-                    emit displayMessage(i18n("Problem editing effect"), ErrorMessage);
-                // if fade effect is displayed, update the effect edit widget with new clip duration
-                if (item->isSelected() && effectPos == item->selectedEffectIndex()) emit clipItemSelected(item, effectPos);
+            end += start;
+            EffectsList::setParameter(oldeffect, "in", QString::number(start));
+            EffectsList::setParameter(oldeffect, "out", QString::number(end));
+            if (!m_document->renderer()->mltEditEffect(m_document->tracksCount() - item->track(), item->startPos(), item->getEffectArgs(oldeffect)))
+                emit displayMessage(i18n("Problem editing effect"), ErrorMessage);
+            // if fade effect is displayed, update the effect edit widget with new clip duration
+            if (item->isSelected() && effectPos == item->selectedEffectIndex()) emit clipItemSelected(item, effectPos);
+        }
+    }
+    int start = item->fadeOut();
+    if (start != 0) {
+        // there is a fade out effect
+        int effectPos = item->hasEffect("volume", "fadeout");
+        if (effectPos != -1) {
+            QDomElement oldeffect = item->effectAt(effectPos);
+            int max = item->cropDuration().frames(m_document->fps());
+            int end = max + item->cropStart().frames(m_document->fps());
+            if (start > max) {
+                // Make sure the fade effect is not longer than the clip
+                item->setFadeOut(max);
+                start = item->fadeOut();
             }
-            effectPos = item->hasEffect("brightness", "fade_to_black");
-            if (effectPos != -1) {
-                QDomElement oldeffect = item->effectAt(effectPos);
-                int end = (item->duration() - item->cropStart()).frames(m_document->fps());
-                int max = item->cropDuration().frames(m_document->fps());
-                if (end > max) {
-                    item->setFadeOut(max);
-                    start = item->fadeOut();
-                }
-                start = end - start;
-                EffectsList::setParameter(oldeffect, "in", QString::number(start));
-                EffectsList::setParameter(oldeffect, "out", QString::number(end));
-                if (!m_document->renderer()->mltEditEffect(m_document->tracksCount() - item->track(), item->startPos(), item->getEffectArgs(oldeffect)))
-                    emit displayMessage(i18n("Problem editing effect"), ErrorMessage);
-                // if fade effect is displayed, update the effect edit widget with new clip duration
-                if (item->isSelected() && effectPos == item->selectedEffectIndex()) emit clipItemSelected(item, effectPos);
+            start = end - start;
+            EffectsList::setParameter(oldeffect, "in", QString::number(start));
+            EffectsList::setParameter(oldeffect, "out", QString::number(end));
+            if (!m_document->renderer()->mltEditEffect(m_document->tracksCount() - item->track(), item->startPos(), item->getEffectArgs(oldeffect)))
+                emit displayMessage(i18n("Problem editing effect"), ErrorMessage);
+            // if fade effect is displayed, update the effect edit widget with new clip duration
+            if (item->isSelected() && effectPos == item->selectedEffectIndex()) emit clipItemSelected(item, effectPos);
+        }
+        effectPos = item->hasEffect("brightness", "fade_to_black");
+        if (effectPos != -1) {
+            QDomElement oldeffect = item->effectAt(effectPos);
+            int max = item->cropDuration().frames(m_document->fps());
+            int end = max + item->cropStart().frames(m_document->fps());
+            if (start > max) {
+                // Make sure the fade effect is not longer than the clip
+                item->setFadeOut(max);
+                start = item->fadeOut();
             }
+            start = end - start;
+            EffectsList::setParameter(oldeffect, "in", QString::number(start));
+            EffectsList::setParameter(oldeffect, "out", QString::number(end));
+            if (!m_document->renderer()->mltEditEffect(m_document->tracksCount() - item->track(), item->startPos(), item->getEffectArgs(oldeffect)))
+                emit displayMessage(i18n("Problem editing effect"), ErrorMessage);
+            // if fade effect is displayed, update the effect edit widget with new clip duration
+            if (item->isSelected() && effectPos == item->selectedEffectIndex()) emit clipItemSelected(item, effectPos);
         }
     }
 }
@@ -3399,7 +3806,7 @@ double CustomTrackView::getSnapPointForPos(double pos)
 void CustomTrackView::updateSnapPoints(AbstractClipItem *selected, QList <GenTime> offsetList, bool skipSelectedItems)
 {
     QList <GenTime> snaps;
-    if (selected && offsetList.isEmpty()) offsetList.append(selected->duration());
+    if (selected && offsetList.isEmpty()) offsetList.append(selected->cropDuration());
     QList<QGraphicsItem *> itemList = items();
     for (int i = 0; i < itemList.count(); i++) {
         if (itemList.at(i) == selected) continue;
@@ -3485,7 +3892,7 @@ void CustomTrackView::slotSeekToNextSnap()
 
 void CustomTrackView::clipStart()
 {
-    ClipItem *item = getMainActiveClip();
+    AbstractClipItem *item = getMainActiveClip();
     if (item != NULL) {
         setCursorPos((int) item->startPos().frames(m_document->fps()));
         checkScrolling();
@@ -3494,7 +3901,7 @@ void CustomTrackView::clipStart()
 
 void CustomTrackView::clipEnd()
 {
-    ClipItem *item = getMainActiveClip();
+    AbstractClipItem *item = getMainActiveClip();
     if (item != NULL) {
         setCursorPos((int) item->endPos().frames(m_document->fps()) - 1);
         checkScrolling();
@@ -3537,15 +3944,11 @@ void CustomTrackView::addMarker(const QString &id, const GenTime &pos, const QSt
     DocClipBase *base = m_document->clipManager()->getClipById(id);
     if (!comment.isEmpty()) base->addSnapMarker(pos, comment);
     else base->deleteSnapMarker(pos);
-    m_document->setModified(true);
+    emit updateClipMarkers(base);
+    setDocumentModified();
     viewport()->update();
 }
 
-bool sortGuidesList(const Guide *g1 , const Guide *g2)
-{
-    return (*g1).position() < (*g2).position();
-}
-
 int CustomTrackView::hasGuide(int pos, int offset)
 {
     for (int i = 0; i < m_guides.count(); i++) {
@@ -3592,7 +3995,7 @@ bool CustomTrackView::addGuide(const GenTime pos, const QString &comment)
             return false;
         }
     }
-    Guide *g = new Guide(this, pos, comment, m_document->fps(), m_tracksHeight * m_document->tracksCount());
+    Guide *g = new Guide(this, pos, comment, m_tracksHeight * m_document->tracksCount());
     scene()->addItem(g);
     m_guides.append(g);
     qSort(m_guides.begin(), m_guides.end(), sortGuidesList);
@@ -3689,59 +4092,65 @@ void CustomTrackView::setTool(PROJECTTOOL tool)
     m_tool = tool;
 }
 
-void CustomTrackView::setScale(double scaleFactor)
+void CustomTrackView::setScale(double scaleFactor, double verticalScale)
 {
     QMatrix matrix;
-    matrix = matrix.scale(scaleFactor, 1);
-    m_scene->setScale(scaleFactor);
-    //scale(scaleFactor, 1);
+    matrix = matrix.scale(scaleFactor, verticalScale);
+    m_scene->setScale(scaleFactor, verticalScale);
+    if (m_visualTip) scene()->removeItem(m_visualTip);
     m_animationTimer->stop();
     delete m_visualTip;
     m_visualTip = NULL;
     delete m_animation;
     m_animation = NULL;
-
-    //setSceneRect(0, 0, m_projectDuration + 100 * scaleFactor, sceneRect().height());
+    double verticalPos = mapToScene(QPoint(0, viewport()->height() / 2)).y();
     setMatrix(matrix);
+    m_cursorLine->setLine(m_cursorLine->line().x1(), 0, m_cursorLine->line().x1(), m_tracksHeight * m_document->tracksCount() * verticalScale);
     int diff = sceneRect().width() - m_projectDuration;
     if (diff * matrix.m11() < 50) {
         if (matrix.m11() < 0.4) setSceneRect(0, 0, (m_projectDuration + 100 / matrix.m11()), sceneRect().height());
         else setSceneRect(0, 0, (m_projectDuration + 300), sceneRect().height());
     }
-
-    centerOn(QPointF(cursorPos(), m_tracksHeight));
-    //verticalScrollBar()->setValue(vert);*/
+    centerOn(QPointF(cursorPos(), verticalPos));
 }
 
 void CustomTrackView::slotRefreshGuides()
 {
     if (KdenliveSettings::showmarkers()) {
-        kDebug() << "// refresh GUIDES";
         for (int i = 0; i < m_guides.count(); i++) {
             m_guides.at(i)->update();
         }
     }
 }
 
-void CustomTrackView::drawBackground(QPainter * painter, const QRectF & rect)
+void CustomTrackView::drawBackground(QPainter * painter, const QRectF &rect)
 {
-    QRectF r = rect;
-    r.setWidth(r.width() + 1);
-    painter->setClipRect(r);
-    painter->drawLine(r.left(), 0, r.right(), 0);
-    uint max = m_document->tracksCount();
+    //kDebug() << "// DRAW BG: " << rect.width();
+    painter->setClipRect(rect);
     KColorScheme scheme(palette().currentColorGroup(), KColorScheme::Window);
+    QPen pen1 = painter->pen();
+    pen1.setColor(scheme.shade(KColorScheme::DarkShade));
+    painter->setPen(pen1);
+    double min = rect.left();
+    double max = rect.right();
+    painter->drawLine(QPointF(min, 0), QPointF(max, 0));
+    uint maxTrack = m_document->tracksCount();
     QColor lockedColor = scheme.background(KColorScheme::NegativeBackground).color();
     QColor audioColor = palette().alternateBase().color();
     QColor base = scheme.background(KColorScheme::NormalBackground).color();
-    for (uint i = 0; i < max;i++) {
-        if (m_document->trackInfoAt(max - i - 1).isLocked == true) painter->fillRect(r.left(), m_tracksHeight * i + 1, r.right() - r.left() + 1, m_tracksHeight - 1, QBrush(lockedColor));
-        else if (m_document->trackInfoAt(max - i - 1).type == AUDIOTRACK) painter->fillRect(r.left(), m_tracksHeight * i + 1, r.right() - r.left() + 1, m_tracksHeight - 1, QBrush(audioColor));
-        painter->drawLine(r.left(), m_tracksHeight * (i + 1), r.right(), m_tracksHeight * (i + 1));
+    for (uint i = 0; i < maxTrack; i++) {
+        TrackInfo info = m_document->trackInfoAt(maxTrack - i - 1);
+        if (info.isLocked || info.type == AUDIOTRACK) {
+            const QRectF track(min, m_tracksHeight * i + 1, max - min, m_tracksHeight - 1);
+            painter->fillRect(track, info.isLocked ? lockedColor : audioColor);
+        }
+        painter->drawLine(QPointF(min, m_tracksHeight *(i + 1)), QPointF(max, m_tracksHeight *(i + 1)));
+    }
+    int lowerLimit = m_tracksHeight * maxTrack + 1;
+    if (height() > lowerLimit) {
+        const QRectF bg(min, lowerLimit, max - min, height() - lowerLimit);
+        painter->fillRect(bg, base);
     }
-    int lowerLimit = m_tracksHeight * m_document->tracksCount() + 1;
-    if (height() > lowerLimit)
-        painter->fillRect(QRectF(r.left(), lowerLimit, r.width(), height() - lowerLimit), QBrush(base));
 }
 
 bool CustomTrackView::findString(const QString &text)
@@ -3821,8 +4230,9 @@ void CustomTrackView::copyClip()
     }
     for (int i = 0; i < itemList.count(); i++) {
         if (itemList.at(i)->type() == AVWIDGET) {
-            ClipItem *dup = static_cast <ClipItem *>(itemList.at(i));
-            m_copiedItems.append(dup->clone(dup->info()));
+            ClipItem *clip = static_cast <ClipItem *>(itemList.at(i));
+            ClipItem *clone = clip->clone(clip->info());
+            m_copiedItems.append(clone);
         } else if (itemList.at(i)->type() == TRANSITIONWIDGET) {
             Transition *dup = static_cast <Transition *>(itemList.at(i));
             m_copiedItems.append(dup->clone());
@@ -3840,6 +4250,20 @@ bool CustomTrackView::canBePastedTo(ItemInfo info, int type) const
     return true;
 }
 
+bool CustomTrackView::canBePastedTo(QList <ItemInfo> infoList, int type) const
+{
+    QPainterPath path;
+    for (int i = 0; i < infoList.count(); i++) {
+        const QRectF rect((double) infoList.at(i).startPos.frames(m_document->fps()), (double)(infoList.at(i).track * m_tracksHeight + 1), (double)(infoList.at(i).endPos - infoList.at(i).startPos).frames(m_document->fps()), (double)(m_tracksHeight - 1));
+        path.addRect(rect);
+    }
+    QList<QGraphicsItem *> collisions = scene()->items(path);
+    for (int i = 0; i < collisions.count(); i++) {
+        if (collisions.at(i)->type() == type) return false;
+    }
+    return true;
+}
+
 bool CustomTrackView::canBePasted(QList<AbstractClipItem *> items, GenTime offset, int trackOffset) const
 {
     for (int i = 0; i < items.count(); i++) {
@@ -3911,11 +4335,10 @@ void CustomTrackView::pasteClip()
         // parse all clip names
         if (m_copiedItems.at(i) && m_copiedItems.at(i)->type() == AVWIDGET) {
             ClipItem *clip = static_cast <ClipItem *>(m_copiedItems.at(i));
-            ItemInfo info;
-            info.startPos = clip->startPos() + offset;
-            info.endPos = clip->endPos() + offset;
-            info.cropStart = clip->cropStart();
-            info.track = clip->track() + trackOffset;
+            ItemInfo info = clip->info();
+            info.startPos += offset;
+            info.endPos += offset;
+            info.track += trackOffset;
             if (canBePastedTo(info, AVWIDGET)) {
                 new AddTimelineClipCommand(this, clip->xml(), clip->clipProducer(), info, clip->effectList(), true, false, pasteClips);
             } else emit displayMessage(i18n("Cannot paste clip to selected place"), ErrorMessage);
@@ -3942,7 +4365,6 @@ void CustomTrackView::pasteClipEffects()
         return;
     }
     ClipItem *clip = static_cast < ClipItem *>(m_copiedItems.at(0));
-    EffectsList effects = clip->effectList();
 
     QUndoCommand *paste = new QUndoCommand();
     paste->setText("Paste effects");
@@ -3951,8 +4373,8 @@ void CustomTrackView::pasteClipEffects()
     for (int i = 0; i < clips.count(); ++i) {
         if (clips.at(i)->type() == AVWIDGET) {
             ClipItem *item = static_cast < ClipItem *>(clips.at(i));
-            for (int i = 0; i < clip->effectsCount(); i++) {
-                new AddEffectCommand(this, m_document->tracksCount() - item->track(), item->startPos(), clip->effectAt(i), true, paste);
+            for (int j = 0; j < clip->effectsCount(); j++) {
+                new AddEffectCommand(this, m_document->tracksCount() - item->track(), item->startPos(), clip->effectAt(j), true, paste);
             }
         }
     }
@@ -3972,17 +4394,18 @@ ClipItem *CustomTrackView::getClipUnderCursor() const
     return NULL;
 }
 
-ClipItem *CustomTrackView::getMainActiveClip() const
+AbstractClipItem *CustomTrackView::getMainActiveClip() const
 {
     QList<QGraphicsItem *> clips = scene()->selectedItems();
     if (clips.isEmpty()) {
         return getClipUnderCursor();
     } else {
-        ClipItem *item = NULL;
+        AbstractClipItem *item = NULL;
         for (int i = 0; i < clips.count(); ++i) {
-            if (clips.at(i)->type() == AVWIDGET)
-                item = static_cast < ClipItem *>(clips.at(i));
-            if (item->startPos().frames(m_document->fps()) <= m_cursorPos && item->endPos().frames(m_document->fps()) >= m_cursorPos) break;
+            if (clips.count() == 1 || clips.at(i)->type() == AVWIDGET) {
+                item = static_cast < AbstractClipItem *>(clips.at(i));
+                if (clips.count() > 1 && item->startPos().frames(m_document->fps()) <= m_cursorPos && item->endPos().frames(m_document->fps()) >= m_cursorPos) break;
+            }
         }
         if (item) return item;
     }
@@ -4015,10 +4438,14 @@ ClipItem *CustomTrackView::getActiveClipUnderCursor(bool allowOutsideCursor) con
 
 void CustomTrackView::setInPoint()
 {
-    ClipItem *clip = getActiveClipUnderCursor(true);
+    AbstractClipItem *clip = getActiveClipUnderCursor(true);
     if (clip == NULL) {
-        emit displayMessage(i18n("You must select one clip for this action"), ErrorMessage);
-        return;
+        if (m_dragItem && m_dragItem->type() == TRANSITIONWIDGET) {
+            clip = m_dragItem;
+        } else {
+            emit displayMessage(i18n("You must select one clip for this action"), ErrorMessage);
+            return;
+        }
     }
     ItemInfo startInfo = clip->info();
     ItemInfo endInfo = startInfo;
@@ -4029,21 +4456,27 @@ void CustomTrackView::setInPoint()
         return;
     } else if (endInfo.startPos < startInfo.startPos) {
         int length = m_document->renderer()->mltGetSpaceLength(endInfo.startPos, m_document->tracksCount() - startInfo.track, false);
-        if (length < (startInfo.startPos - endInfo.startPos).frames(m_document->fps())) {
+        if ((clip->type() == TRANSITIONWIDGET && itemCollision(clip, endInfo) == true) || (
+                    (clip->type() == AVWIDGET) && length < (startInfo.startPos - endInfo.startPos).frames(m_document->fps()))) {
             emit displayMessage(i18n("Invalid action"), ErrorMessage);
             return;
         }
     }
-    ResizeClipCommand *command = new ResizeClipCommand(this, startInfo, endInfo, true);
-    m_commandStack->push(command);
+    if (clip->type() == TRANSITIONWIDGET) {
+        m_commandStack->push(new MoveTransitionCommand(this, startInfo, endInfo, true));
+    } else m_commandStack->push(new ResizeClipCommand(this, startInfo, endInfo, true, false));
 }
 
 void CustomTrackView::setOutPoint()
 {
-    ClipItem *clip = getActiveClipUnderCursor(true);
+    AbstractClipItem *clip = getActiveClipUnderCursor(true);
     if (clip == NULL) {
-        emit displayMessage(i18n("You must select one clip for this action"), ErrorMessage);
-        return;
+        if (m_dragItem && m_dragItem->type() == TRANSITIONWIDGET) {
+            clip = m_dragItem;
+        } else {
+            emit displayMessage(i18n("You must select one clip for this action"), ErrorMessage);
+            return;
+        }
     }
     ItemInfo startInfo = clip->info();
     ItemInfo endInfo = clip->info();
@@ -4054,16 +4487,16 @@ void CustomTrackView::setOutPoint()
         return;
     } else if (endInfo.endPos > startInfo.endPos) {
         int length = m_document->renderer()->mltGetSpaceLength(endInfo.endPos, m_document->tracksCount() - startInfo.track, false);
-        if (length < (endInfo.endPos - startInfo.endPos).frames(m_document->fps())) {
+        if ((clip->type() == TRANSITIONWIDGET && itemCollision(clip, endInfo) == true) || (clip->type() == AVWIDGET && length < (endInfo.endPos - startInfo.endPos).frames(m_document->fps()))) {
             emit displayMessage(i18n("Invalid action"), ErrorMessage);
             return;
         }
     }
 
 
-
-    ResizeClipCommand *command = new ResizeClipCommand(this, startInfo, endInfo, true);
-    m_commandStack->push(command);
+    if (clip->type() == TRANSITIONWIDGET) {
+        m_commandStack->push(new MoveTransitionCommand(this, startInfo, endInfo, true));
+    } else m_commandStack->push(new ResizeClipCommand(this, startInfo, endInfo, true, false));
 }
 
 void CustomTrackView::slotUpdateAllThumbs()
@@ -4071,18 +4504,17 @@ void CustomTrackView::slotUpdateAllThumbs()
     QList<QGraphicsItem *> itemList = items();
     //if (itemList.isEmpty()) return;
     ClipItem *item;
-    QString thumbBase = m_document->projectFolder().path() + "/thumbs/";
+    const QString thumbBase = m_document->projectFolder().path() + "/thumbs/";
     for (int i = 0; i < itemList.count(); i++) {
         if (itemList.at(i)->type() == AVWIDGET) {
             item = static_cast <ClipItem *>(itemList.at(i));
-            if (item->clipType() != COLOR) {
+            if (item->clipType() != COLOR && item->clipType() != AUDIO) {
                 // Check if we have a cached thumbnail
-                if (item->clipType() == IMAGE || item->clipType() == TEXT || item->clipType() == AUDIO) {
+                if (item->clipType() == IMAGE || item->clipType() == TEXT) {
                     QString thumb = thumbBase + item->baseClip()->getClipHash() + "_0.png";
                     if (QFile::exists(thumb)) {
                         QPixmap pix(thumb);
                         item->slotSetStartThumb(pix);
-                        item->slotSetEndThumb(pix);
                     }
                 } else {
                     QString startThumb = thumbBase + item->baseClip()->getClipHash() + '_';
@@ -4144,21 +4576,20 @@ void CustomTrackView::saveThumbnails()
 
 void CustomTrackView::slotInsertTrack(int ix)
 {
-    kDebug() << "// INSERTING TRK: " << ix;
-    QDialog d(parentWidget());
-    Ui::AddTrack_UI view;
-    view.setupUi(&d);
-    view.track_nb->setMaximum(m_document->tracksCount() - 1);
-    view.track_nb->setValue(ix);
-    d.setWindowTitle(i18n("Insert Track"));
+    TrackDialog d(m_document, parentWidget());
+    d.label->setText(i18n("Insert track"));
+    d.track_nb->setMaximum(m_document->tracksCount() - 1);
+    d.track_nb->setValue(ix);
+    d.setWindowTitle(i18n("Insert New Track"));
+    d.slotUpdateName(ix);
 
     if (d.exec() == QDialog::Accepted) {
-        ix = view.track_nb->value();
-        if (view.before_select->currentIndex() == 1) {
+        ix = d.track_nb->value();
+        if (d.before_select->currentIndex() == 1) {
             ix++;
         }
         TrackInfo info;
-        if (view.video_track->isChecked()) {
+        if (d.video_track->isChecked()) {
             info.type = VIDEOTRACK;
             info.isMute = false;
             info.isBlind = false;
@@ -4171,18 +4602,26 @@ void CustomTrackView::slotInsertTrack(int ix)
         }
         AddTrackCommand *addTrack = new AddTrackCommand(this, ix, info, true);
         m_commandStack->push(addTrack);
-        m_document->setModified(true);
+        setDocumentModified();
     }
 }
 
 void CustomTrackView::slotDeleteTrack(int ix)
 {
-    bool ok;
-    ix = QInputDialog::getInteger(this, i18n("Remove Track"), i18n("Track"), ix, 0, m_document->tracksCount() - 1, 1, &ok);
-    if (ok) {
+    TrackDialog d(m_document, parentWidget());
+    d.label->setText(i18n("Delete track"));
+    d.before_select->setHidden(true);
+    d.track_nb->setMaximum(m_document->tracksCount() - 1);
+    d.track_nb->setValue(ix);
+    d.slotUpdateName(ix);
+    d.setWindowTitle(i18n("Delete Track"));
+    d.video_track->setHidden(true);
+    d.audio_track->setHidden(true);
+    if (d.exec() == QDialog::Accepted) {
+        ix = d.track_nb->value();
         TrackInfo info = m_document->trackInfoAt(m_document->tracksCount() - ix - 1);
         deleteTimelineTrack(ix, info);
-        m_document->setModified(true);
+        setDocumentModified();
         /*AddTrackCommand* command = new AddTrackCommand(this, ix, info, false);
         m_commandStack->push(command);*/
     }
@@ -4190,27 +4629,26 @@ void CustomTrackView::slotDeleteTrack(int ix)
 
 void CustomTrackView::slotChangeTrack(int ix)
 {
-    QDialog d(parentWidget());
-    Ui::AddTrack_UI view;
-    view.setupUi(&d);
-    view.label->setText(i18n("Change track"));
-    view.before_select->setHidden(true);
-    view.track_nb->setMaximum(m_document->tracksCount() - 1);
-    view.track_nb->setValue(ix);
+    TrackDialog d(m_document, parentWidget());
+    d.label->setText(i18n("Change track"));
+    d.before_select->setHidden(true);
+    d.track_nb->setMaximum(m_document->tracksCount() - 1);
+    d.track_nb->setValue(ix);
+    d.slotUpdateName(ix);
     d.setWindowTitle(i18n("Change Track Type"));
 
     if (m_document->trackInfoAt(m_document->tracksCount() - ix - 1).type == VIDEOTRACK)
-        view.video_track->setChecked(true);
+        d.video_track->setChecked(true);
     else
-        view.audio_track->setChecked(true);
+        d.audio_track->setChecked(true);
 
     if (d.exec() == QDialog::Accepted) {
         TrackInfo info;
         info.isLocked = false;
         info.isMute = false;
-        ix = view.track_nb->value();
+        ix = d.track_nb->value();
 
-        if (view.video_track->isChecked()) {
+        if (d.video_track->isChecked()) {
             info.type = VIDEOTRACK;
             info.isBlind = false;
         } else {
@@ -4218,7 +4656,7 @@ void CustomTrackView::slotChangeTrack(int ix)
             info.isBlind = true;
         }
         changeTimelineTrack(ix, info);
-        m_document->setModified(true);
+        setDocumentModified();
     }
 }
 
@@ -4248,7 +4686,6 @@ void CustomTrackView::deleteTimelineTrack(int ix, TrackInfo trackinfo)
         }
     }
 
-    selection = m_scene->items();
     new AddTrackCommand(this, ix, trackinfo, false, deleteTrack);
     m_commandStack->push(deleteTrack);
 }
@@ -4401,7 +4838,7 @@ void CustomTrackView::doSplitAudio(const GenTime &pos, int track, bool split)
             kDebug() << "// CHK DOC TRK:" << freetrack << ", DUR:" << m_document->renderer()->mltTrackDuration(freetrack);
             if (m_document->trackInfoAt(freetrack - 1).type == AUDIOTRACK) {
                 kDebug() << "// CHK DOC TRK:" << freetrack << ", DUR:" << m_document->renderer()->mltTrackDuration(freetrack);
-                if (m_document->renderer()->mltTrackDuration(freetrack) < start || m_document->renderer()->mltGetSpaceLength(pos, freetrack, false) >= clip->duration().frames(m_document->fps())) {
+                if (m_document->renderer()->mltTrackDuration(freetrack) < start || m_document->renderer()->mltGetSpaceLength(pos, freetrack, false) >= clip->cropDuration().frames(m_document->fps())) {
                     kDebug() << "FOUND SPACE ON TRK: " << freetrack;
                     break;
                 }
@@ -4411,10 +4848,7 @@ void CustomTrackView::doSplitAudio(const GenTime &pos, int track, bool split)
         if (freetrack == 0) {
             emit displayMessage(i18n("No empty space to put clip audio"), ErrorMessage);
         } else {
-            ItemInfo info;
-            info.startPos = clip->startPos();
-            info.endPos = clip->endPos();
-            info.cropStart = clip->cropStart();
+            ItemInfo info = clip->info();
             info.track = m_document->tracksCount() - freetrack;
             addClip(clip->xml(), clip->clipProducer(), info, clip->effectList());
             scene()->clearSelection();
@@ -4556,7 +4990,7 @@ void CustomTrackView::doChangeClipType(const GenTime &pos, int track, bool video
         m_document->renderer()->mltUpdateClipProducer(m_document->tracksCount() - track, start, clip->baseClip()->producer(track));
     }
     clip->update();
-    m_document->setModified(true);
+    setDocumentModified();
 }
 
 void CustomTrackView::updateClipTypeActions(ClipItem *clip)
@@ -4628,4 +5062,52 @@ void CustomTrackView::reloadTransitionLumas()
     emit transitionItemSelected(NULL);
 }
 
-#include "customtrackview.moc"
+double CustomTrackView::fps() const
+{
+    return m_document->fps();
+}
+
+void CustomTrackView::updateProjectFps()
+{
+    // update all clips to the new fps
+    resetSelectionGroup();
+    scene()->clearSelection();
+    m_dragItem = NULL;
+    QList<QGraphicsItem *> itemList = items();
+    for (int i = 0; i < itemList.count(); i++) {
+        // remove all items and re-add them one by one
+        if (itemList.at(i) != m_cursorLine && itemList.at(i)->parentItem() == NULL) m_scene->removeItem(itemList.at(i));
+    }
+    for (int i = 0; i < itemList.count(); i++) {
+        if (itemList.at(i)->parentItem() == 0 && (itemList.at(i)->type() == AVWIDGET || itemList.at(i)->type() == TRANSITIONWIDGET)) {
+            AbstractClipItem *clip = static_cast <AbstractClipItem *>(itemList.at(i));
+            clip->updateFps(m_document->fps());
+            m_scene->addItem(clip);
+        } else if (itemList.at(i)->type() == GROUPWIDGET) {
+            AbstractGroupItem *grp = static_cast <AbstractGroupItem *>(itemList.at(i));
+            QList<QGraphicsItem *> children = grp->childItems();
+            for (int j = 0; j < children.count(); j++) {
+                if (children.at(j)->type() == AVWIDGET || children.at(j)->type() == TRANSITIONWIDGET) {
+                    AbstractClipItem *clip = static_cast <AbstractClipItem *>(children.at(j));
+                    clip->setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
+                    clip->updateFps(m_document->fps());
+                }
+            }
+            m_document->clipManager()->removeGroup(grp);
+            m_scene->addItem(grp);
+            scene()->destroyItemGroup(grp);
+            for (int j = 0; j < children.count(); j++) {
+                if (children.at(j)->type() == AVWIDGET || children.at(j)->type() == TRANSITIONWIDGET) {
+                    //children.at(j)->setParentItem(0);
+                    children.at(j)->setSelected(true);
+                }
+            }
+            groupSelectedItems(true, true);
+        } else if (itemList.at(i)->type() == GUIDEITEM) {
+            Guide *g = static_cast<Guide *>(itemList.at(i));
+            g->updatePos();
+            m_scene->addItem(g);
+        }
+    }
+    viewport()->update();
+}