]> git.sesse.net Git - kdenlive/blobdiff - src/renderer.cpp
* Cleanup monitor / MLT communication
[kdenlive] / src / renderer.cpp
index 142c9b158be551a421d6855bbd6f539458c741a7..8ca08514e914f847d2d8f7558d0831deff5ac1dc 100644 (file)
 
 #include <QTimer>
 #include <QDir>
+#include <QString>
 #include <QApplication>
 
-#include <stdlib.h>
+#include <cstdlib>
+#include <cstdarg>
 
 
 
@@ -49,6 +51,7 @@ static void kdenlive_callback(void* /*ptr*/, int level, const char* fmt, va_list
     if (level > MLT_LOG_ERROR) return;
     QString error;
     QApplication::postEvent(qApp->activeWindow() , new MltErrorEvent(error.vsprintf(fmt, vl).simplified()));
+    va_end(vl);
 }
 
 
@@ -56,34 +59,44 @@ static void consumer_frame_show(mlt_consumer, Render * self, mlt_frame frame_ptr
 {
     // detect if the producer has finished playing. Is there a better way to do it?
     if (self->m_isBlocked) return;
-    if (mlt_properties_get_double(MLT_FRAME_PROPERTIES(frame_ptr), "_speed") == 0.0) {
+    Mlt::Frame frame(frame_ptr);
+#ifdef Q_WS_MAC
+    self->showFrame(frame);
+#endif
+
+    self->emitFrameNumber(mlt_frame_get_position(frame_ptr));
+    if (frame.get_double("_speed") == 0.0) {
+        self->emitConsumerStopped();
+    } else if (frame.get_double("_speed") < 0.0 && mlt_frame_get_position(frame_ptr) <= 0) {
+        self->pause();
         self->emitConsumerStopped();
-    } else {
-        self->emitFrameNumber(mlt_frame_get_position(frame_ptr));
     }
 }
 
-Render::Render(const QString & rendererName, int winid, int /* extid */, QWidget *parent) :
+
+Render::Render(const QString & rendererName, int winid, int /* extid */, QString profile, QWidget *parent) :
         QObject(parent),
         m_isBlocked(0),
         m_name(rendererName),
         m_mltConsumer(NULL),
         m_mltProducer(NULL),
+        m_mltProfile(NULL),
         m_framePosition(0),
         m_isZoneMode(false),
         m_isLoopMode(false),
         m_isSplitView(false),
         m_blackClip(NULL),
         m_winid(winid)
+#ifdef Q_WS_MAC
+        , m_glWidget(0)
+#endif
 {
-    kDebug() << "//////////  USING PROFILE: " << (char*)KdenliveSettings::current_profile().toUtf8().data();
-
     /*if (rendererName == "project") m_monitorId = 10000;
     else m_monitorId = 10001;*/
     /*m_osdTimer = new QTimer(this);
     connect(m_osdTimer, SIGNAL(timeout()), this, SLOT(slotOsdTimeout()));*/
-
-    buildConsumer();
+    if (profile.isEmpty()) profile = KdenliveSettings::current_profile();
+    buildConsumer(profile);
 
     m_mltProducer = m_blackClip->cut(0, 50);
     m_mltConsumer->connect(*m_mltProducer);
@@ -100,37 +113,64 @@ Render::~Render()
 void Render::closeMlt()
 {
     //delete m_osdTimer;
+    if (m_mltProducer) {
+        Mlt::Service service(m_mltProducer->parent().get_service());
+        mlt_service_lock(service.get_service());
 
-    Mlt::Service service(m_mltProducer->get_service());
-    if (service.type() == tractor_type) {
-        Mlt::Tractor tractor(service);
-        int trackNb = tractor.count();
+        if (service.type() == tractor_type) {
+            Mlt::Tractor tractor(service);
+            Mlt::Field *field = tractor.field();
+            mlt_service nextservice = mlt_service_get_producer(service.get_service());
+            mlt_service nextservicetodisconnect;
+            mlt_properties properties = MLT_SERVICE_PROPERTIES(nextservice);
+            QString mlt_type = mlt_properties_get(properties, "mlt_type");
+            QString resource = mlt_properties_get(properties, "mlt_service");
+            // Delete all transitions
+            while (mlt_type == "transition") {
+                nextservicetodisconnect = nextservice;
+                nextservice = mlt_service_producer(nextservice);
+                mlt_field_disconnect_service(field->get_field(), nextservicetodisconnect);
+                nextservice = mlt_service_producer(nextservice);
+                if (nextservice == NULL) break;
+                properties = MLT_SERVICE_PROPERTIES(nextservice);
+                mlt_type = mlt_properties_get(properties, "mlt_type");
+                resource = mlt_properties_get(properties, "mlt_service");
+            }
 
-        while (trackNb > 1) {
-            Mlt::Producer trackProducer(tractor.track(trackNb - 1));
-            Mlt::Playlist trackPlaylist((mlt_playlist) trackProducer.get_service());
-            trackPlaylist.clear();
-            trackNb--;
+            int trackNb = tractor.count();
+            while (trackNb > 0) {
+                Mlt::Producer trackProducer(tractor.track(trackNb - 1));
+                Mlt::Playlist trackPlaylist((mlt_playlist) trackProducer.get_service());
+                if (trackPlaylist.type() == playlist_type) trackPlaylist.clear();
+                trackNb--;
+            }
         }
+        mlt_service_unlock(service.get_service());
     }
 
-    kDebug() << "// // // CLOSE RENDERER";
+    kDebug() << "// // // CLOSE RENDERER " << m_name;
     delete m_mltConsumer;
     delete m_mltProducer;
     delete m_blackClip;
     //delete m_osdInfo;
 }
 
+void Render::slotSwitchFullscreen()
+{
+    if (m_mltConsumer) m_mltConsumer->set("full_screen", 1);
+}
 
-void Render::buildConsumer()
+void Render::buildConsumer(const QString profileName)
 {
     char *tmp;
-    m_activeProfile = KdenliveSettings::current_profile();
+    m_activeProfile = profileName;
     tmp = decodedString(m_activeProfile);
     setenv("MLT_PROFILE", tmp, 1);
     delete m_blackClip;
     m_blackClip = NULL;
 
+    //TODO: uncomment following line when everything is clean
+    //if (m_mltProfile) delete m_mltProfile;
     m_mltProfile = new Mlt::Profile(tmp);
     delete[] tmp;
 
@@ -145,7 +185,14 @@ void Render::buildConsumer()
     }
     setenv("SDL_VIDEO_ALLOW_SCREENSAVER", "1", 1);
 
+    //m_mltConsumer->set("fullscreen", 1);
+#ifdef Q_WS_MAC
+    m_mltConsumer = new Mlt::Consumer(*m_mltProfile , "sdl_audio");
+    m_mltConsumer->set("preview_off", 1);
+    m_mltConsumer->set("preview_format", mlt_image_rgb24a);
+#else
     m_mltConsumer = new Mlt::Consumer(*m_mltProfile , "sdl_preview");
+#endif
     m_mltConsumer->set("resize", 1);
     m_mltConsumer->set("window_id", m_winid);
     m_mltConsumer->set("terminate_on_pause", 1);
@@ -192,39 +239,62 @@ void Render::buildConsumer()
 
     m_blackClip = new Mlt::Producer(*m_mltProfile , "colour", "black");
     m_blackClip->set("id", "black");
+    m_blackClip->set("mlt_type", "producer");
 
 }
 
-int Render::resetProfile()
+int Render::resetProfile(const QString profileName)
 {
-    if (!m_mltConsumer) return 0;
-    if (m_activeProfile == KdenliveSettings::current_profile()) {
-        kDebug() << "reset to same profile, nothing to do";
-        return 1;
+    if (m_mltConsumer) {
+        QString videoDriver = KdenliveSettings::videodrivername();
+        QString currentDriver = m_mltConsumer->get("video_driver");
+        if (getenv("SDL_VIDEO_YUV_HWACCEL") != NULL && currentDriver == "x11") currentDriver = "x11_noaccel";
+        if (m_activeProfile == profileName && currentDriver == videoDriver) {
+            kDebug() << "reset to same profile, nothing to do";
+            return 1;
+        }
+
+        if (m_isSplitView) slotSplitView(false);
+        if (!m_mltConsumer->is_stopped()) m_mltConsumer->stop();
+        m_mltConsumer->purge();
+        delete m_mltConsumer;
+        m_mltConsumer = NULL;
     }
-    kDebug() << "// RESETTING PROFILE FROM: " << m_activeProfile << " TO: " << KdenliveSettings::current_profile();
-    if (m_isSplitView) slotSplitView(false);
-    if (!m_mltConsumer->is_stopped()) m_mltConsumer->stop();
-    m_mltConsumer->purge();
-    delete m_mltConsumer;
-    m_mltConsumer = NULL;
     QString scene = sceneList();
     int pos = 0;
+    double current_fps = m_mltProfile->fps();
+    delete m_blackClip;
+    m_blackClip = NULL;
+
     if (m_mltProducer) {
         pos = m_mltProducer->position();
+
+        Mlt::Service service(m_mltProducer->get_service());
+        if (service.type() == tractor_type) {
+            Mlt::Tractor tractor(service);
+            int trackNb = tractor.count();
+            while (trackNb > 0) {
+                Mlt::Producer trackProducer(tractor.track(trackNb - 1));
+                Mlt::Playlist trackPlaylist((mlt_playlist) trackProducer.get_service());
+                trackPlaylist.clear();
+                trackNb--;
+            }
+        }
+
         delete m_mltProducer;
     }
     m_mltProducer = NULL;
 
-    //WARNING: Trying to delete the profile will crash when trying to display a clip afterwards...
-    /*if (m_mltProfile) delete m_mltProfile;
-    m_mltProfile = NULL;*/
-
-    buildConsumer();
-
+    buildConsumer(profileName);
+    double new_fps = m_mltProfile->fps();
+    if (current_fps != new_fps) {
+        // fps changed, we must update the scenelist positions
+        scene = updateSceneListFps(current_fps, new_fps, scene);
+    }
     //kDebug() << "//RESET WITHSCENE: " << scene;
     setSceneList(scene, pos);
-
+    // producers have changed (different profile), so reset them...
+    emit refreshDocumentProducers();
     /*char *tmp = decodedString(scene);
     Mlt::Producer *producer = new Mlt::Producer(*m_mltProfile , "xml-string", tmp);
     delete[] tmp;
@@ -295,14 +365,15 @@ int Render::renderHeight() const
     return m_mltProfile->height();
 }
 
-QPixmap Render::extractFrame(int frame_position, int width, int height)
+QImage Render::extractFrame(int frame_position, int width, int height)
 {
     if (width == -1) {
         width = renderWidth();
         height = renderHeight();
     } else if (width % 2 == 1) width++;
-    QPixmap pix(width, height);
+
     if (!m_mltProducer) {
+        QImage pix(width, height, QImage::Format_RGB32);
         pix.fill(Qt::black);
         return pix;
     }
@@ -520,10 +591,11 @@ void Render::slotSplitView(bool doit)
     }
 }
 
-void Render::getFileProperties(const QDomElement &xml, const QString &clipId, bool replaceProducer)
+void Render::getFileProperties(const QDomElement xml, const QString &clipId, int imageHeight, bool replaceProducer)
 {
     KUrl url = KUrl(xml.attribute("resource", QString()));
     Mlt::Producer *producer = NULL;
+    //kDebug() << "PROFILE WIDT: "<< xml.attribute("mlt_service") << ": "<< m_mltProfile->width() << "\n...................\n\n";
     /*if (xml.attribute("type").toInt() == TEXT && !QFile::exists(url.path())) {
         emit replyGetFileProperties(clipId, producer, QMap < QString, QString >(), QMap < QString, QString >(), replaceProducer);
         return;
@@ -568,6 +640,17 @@ void Render::getFileProperties(const QDomElement &xml, const QString &clipId, bo
         double aspect = xml.attribute("force_aspect_ratio").toDouble();
         if (aspect > 0) producer->set("force_aspect_ratio", aspect);
     }
+
+    if (xml.hasAttribute("force_fps")) {
+        double fps = xml.attribute("force_fps").toDouble();
+        if (fps > 0) producer->set("force_fps", fps);
+    }
+
+    if (xml.hasAttribute("force_progressive")) {
+        bool ok;
+        int progressive = xml.attribute("force_progressive").toInt(&ok);
+        if (ok) producer->set("force_progressive", progressive);
+    }
     if (xml.hasAttribute("threads")) {
         int threads = xml.attribute("threads").toInt();
         if (threads != 1) producer->set("threads", threads);
@@ -587,14 +670,19 @@ void Render::getFileProperties(const QDomElement &xml, const QString &clipId, bo
     producer->set("id", tmp);
     delete[] tmp;
 
+    if (xml.hasAttribute("templatetext")) {
+        char *tmp = decodedString(xml.attribute("templatetext"));
+        producer->set("templatetext", tmp);
+        delete[] tmp;
+    }
+
     if (!replaceProducer && xml.hasAttribute("file_hash")) {
         // Clip  already has all properties
         emit replyGetFileProperties(clipId, producer, QMap < QString, QString >(), QMap < QString, QString >(), replaceProducer);
         return;
     }
 
-    int height = 50;
-    int width = (int)(height  * m_mltProfile->dar());
+    int width = (int)(imageHeight  * m_mltProfile->dar());
     QMap < QString, QString > filePropertyMap;
     QMap < QString, QString > metadataPropertyMap;
 
@@ -649,8 +737,8 @@ void Render::getFileProperties(const QDomElement &xml, const QString &clipId, bo
 
             mlt_image_format format = mlt_image_rgb24a;
             int frame_width = width;
-            int frame_height = height;
-            QPixmap pix(width, height);
+            int frame_height = imageHeight;
+            QPixmap pix(width, imageHeight);
             uint8_t *data = frame->get_image(format, frame_width, frame_height, 0);
             QImage image((uchar *)data, frame_width, frame_height, QImage::Format_ARGB32);
 
@@ -662,7 +750,7 @@ void Render::getFileProperties(const QDomElement &xml, const QString &clipId, bo
             emit replyGetImage(clipId, pix);
 
         } else if (frame->get_int("test_audio") == 0) {
-            QPixmap pixmap = KIcon("audio-x-generic").pixmap(QSize(width, height));
+            QPixmap pixmap = KIcon("audio-x-generic").pixmap(QSize(width, imageHeight));
             emit replyGetImage(clipId, pixmap);
             filePropertyMap["type"] = "audio";
         }
@@ -744,7 +832,7 @@ void Render::getFileProperties(const QDomElement &xml, const QString &clipId, bo
         if (name.endsWith("markup") && !value.isEmpty())
             metadataPropertyMap[ name.section('.', 0, -2)] = value;
     }
-
+    producer->seek(0);
     emit replyGetFileProperties(clipId, producer, filePropertyMap, metadataPropertyMap, replaceProducer);
     kDebug() << "REquested fuile info for: " << url.path();
     delete frame;
@@ -818,10 +906,14 @@ int Render::setProducer(Mlt::Producer *producer, int position)
     m_mltProducer->set("skip_loop_filter", "all");
         m_mltProducer->set("skip_frame", "bidir");
     }*/
-    if (!m_mltProducer || !m_mltProducer->is_valid()) kDebug() << " WARNING - - - - -INVALID PLAYLIST: ";
+    if (!m_mltProducer || !m_mltProducer->is_valid()) {
+        kDebug() << " WARNING - - - - -INVALID PLAYLIST: ";
+        return -1;
+    }
 
     m_fps = m_mltProducer->get_fps();
     int error = connectPlaylist();
+
     if (position != -1) {
         m_mltProducer->seek(position);
         emit rendererPosition(position);
@@ -843,27 +935,61 @@ int Render::setSceneList(QString playlist, int position)
 {
     if (m_winid == -1) return -1;
     m_isBlocked = true;
-    int error;
-    qDeleteAll(m_slowmotionProducers.values());
-    m_slowmotionProducers.clear();
+    int error = 0;
 
-    //kWarning() << "//////  RENDER, SET SCENE LIST: " << playlist;
+    kDebug() << "//////  RENDER, SET SCENE LIST: " << playlist;
 
-    if (m_mltConsumer == NULL) {
+    if (m_mltConsumer) {
+        if (!m_mltConsumer->is_stopped()) {
+            m_mltConsumer->stop();
+        }
+        m_mltConsumer->set("refresh", 0);
+    } else {
         kWarning() << "///////  ERROR, TRYING TO USE NULL MLT CONSUMER";
-        m_isBlocked = false;
-        return -1;
-    }
-
-    if (!m_mltConsumer->is_stopped()) {
-        m_mltConsumer->stop();
-        //m_mltConsumer->set("refresh", 0);
+        error = -1;
     }
 
     if (m_mltProducer) {
         m_mltProducer->set_speed(0);
         //if (KdenliveSettings::osdtimecode() && m_osdInfo) m_mltProducer->detach(*m_osdInfo);
 
+
+        Mlt::Service service(m_mltProducer->parent().get_service());
+        mlt_service_lock(service.get_service());
+
+        if (service.type() == tractor_type) {
+            Mlt::Tractor tractor(service);
+            Mlt::Field *field = tractor.field();
+            mlt_service nextservice = mlt_service_get_producer(service.get_service());
+            mlt_service nextservicetodisconnect;
+            mlt_properties properties = MLT_SERVICE_PROPERTIES(nextservice);
+            QString mlt_type = mlt_properties_get(properties, "mlt_type");
+            QString resource = mlt_properties_get(properties, "mlt_service");
+            // Delete all transitions
+            while (mlt_type == "transition") {
+                nextservicetodisconnect = nextservice;
+                nextservice = mlt_service_producer(nextservice);
+                mlt_field_disconnect_service(field->get_field(), nextservicetodisconnect);
+                if (nextservice == NULL) break;
+                properties = MLT_SERVICE_PROPERTIES(nextservice);
+                mlt_type = mlt_properties_get(properties, "mlt_type");
+                resource = mlt_properties_get(properties, "mlt_service");
+            }
+
+            int trackNb = tractor.count();
+            while (trackNb > 0) {
+                Mlt::Producer trackProducer(tractor.track(trackNb - 1));
+                Mlt::Playlist trackPlaylist((mlt_playlist) trackProducer.get_service());
+                if (trackPlaylist.type() == playlist_type) trackPlaylist.clear();
+                trackNb--;
+            }
+            delete field;
+        }
+        mlt_service_unlock(service.get_service());
+
+        qDeleteAll(m_slowmotionProducers.values());
+        m_slowmotionProducers.clear();
+
         delete m_mltProducer;
         m_mltProducer = NULL;
         emit stopped();
@@ -876,6 +1002,7 @@ int Render::setSceneList(QString playlist, int position)
     if (!m_mltProducer || !m_mltProducer->is_valid()) {
         kDebug() << " WARNING - - - - -INVALID PLAYLIST: " << tmp;
         m_mltProducer = m_blackClip->cut(0, 50);
+        error = -1;
     }
     delete[] tmp;
 
@@ -911,12 +1038,13 @@ int Render::setSceneList(QString playlist, int position)
     }
 
     kDebug() << "// NEW SCENE LIST DURATION SET TO: " << m_mltProducer->get_playtime();
-    error = connectPlaylist();
+    if (error == 0) error = connectPlaylist();
+    else connectPlaylist();
     fillSlowMotionProducers();
 
     m_isBlocked = false;
     blockSignals(false);
-    emit refreshDocumentProducers();
+
     return error;
     //kDebug()<<"// SETSCN LST, POS: "<<position;
     //if (position != 0) emit rendererPosition(position);
@@ -1012,9 +1140,8 @@ int Render::connectPlaylist()
     if (m_mltConsumer->start() == -1) {
         // ARGH CONSUMER BROKEN!!!!
         KMessageBox::error(qApp->activeWindow(), i18n("Could not create the video preview window.\nThere is something wrong with your Kdenlive install or your driver settings, please fix it."));
-        emit blockMonitors();
-        delete m_mltProducer;
-        m_mltProducer = NULL;
+        delete m_mltConsumer;
+        m_mltConsumer = NULL;
         return -1;
     }
     emit durationChanged(m_mltProducer->get_playtime());
@@ -1081,10 +1208,8 @@ void Render::start()
     if (m_mltConsumer && m_mltConsumer->is_stopped()) {
         kDebug() << "-----  MONITOR: " << m_name << " WAS STOPPED";
         if (m_mltConsumer->start() == -1) {
-            KMessageBox::error(qApp->activeWindow(), i18n("Could not create the video preview window.\nThere is something wrong with your Kdenlive install or your driver settings, please fix it."));
-            emit blockMonitors();
-            delete m_mltProducer;
-            m_mltProducer = NULL;
+            //KMessageBox::error(qApp->activeWindow(), i18n("Could not create the video preview window.\nThere is something wrong with your Kdenlive install or your driver settings, please fix it."));
+            kdWarning() << "/ / / / CANNOT START MONITOR";
         } else {
             kDebug() << "-----  MONITOR: " << m_name << " REFRESH";
             m_isBlocked = false;
@@ -1094,23 +1219,6 @@ void Render::start()
     m_isBlocked = false;
 }
 
-void Render::clear()
-{
-    kDebug() << " *********  RENDER CLEAR";
-    if (m_mltConsumer) {
-        //m_mltConsumer->set("refresh", 0);
-        if (!m_mltConsumer->is_stopped()) m_mltConsumer->stop();
-    }
-
-    if (m_mltProducer) {
-        //if (KdenliveSettings::osdtimecode() && m_osdInfo) m_mltProducer->detach(*m_osdInfo);
-        m_mltProducer->set_speed(0.0);
-        delete m_mltProducer;
-        m_mltProducer = NULL;
-        emit stopped();
-    }
-}
-
 void Render::stop()
 {
     if (m_mltProducer == NULL) return;
@@ -1155,8 +1263,10 @@ void Render::pause()
     m_isBlocked = true;
     m_mltConsumer->set("refresh", 0);
     m_mltProducer->set_speed(0.0);
+    /*
+    The 2 lines below create a flicker loop
     emit rendererPosition(m_framePosition);
-    m_mltProducer->seek(m_framePosition);
+    m_mltProducer->seek(m_framePosition);*/
     m_mltConsumer->purge();
 }
 
@@ -1173,7 +1283,7 @@ void Render::switchPlay()
         m_isBlocked = true;
         m_mltConsumer->set("refresh", 0);
         m_mltProducer->set_speed(0.0);
-        emit rendererPosition(m_framePosition);
+        //emit rendererPosition(m_framePosition);
         m_mltProducer->seek(m_framePosition);
         m_mltConsumer->purge();
         //kDebug()<<" *********  RENDER PAUSE: "<<m_mltProducer->get_speed();
@@ -1290,11 +1400,13 @@ void Render::setDropFrames(bool show)
         int dropFrames = 1;
         if (show == false) dropFrames = 0;
         m_mltConsumer->stop();
+#ifdef Q_WS_MAC
+        m_mltConsumer->set("real_time", dropFrames);
+#else
         m_mltConsumer->set("play.real_time", dropFrames);
+#endif
         if (m_mltConsumer->start() == -1) {
-            emit blockMonitors();
-            delete m_mltProducer;
-            m_mltProducer = NULL;
+            kdWarning() << "ERROR, Cannot start monitor";
         }
 
     }
@@ -1378,74 +1490,104 @@ void Render::exportCurrentFrame(KUrl url, bool /*notify*/)
     //if (notify) QApplication::postEvent(qApp->activeWindow(), new UrlEvent(url, 10003));
 }
 
+#ifdef Q_WS_MAC
+void Render::showFrame(Mlt::Frame& frame)
+{
+    mlt_image_format format = mlt_image_rgb24a;
+    int width = 0;
+    int height = 0;
+    const uchar* image = frame.get_image(format, width, height);
+    QImage qimage(width, height, QImage::Format_ARGB32);
+    memcpy(qimage.scanLine(0), image, width * height * 4);
+    emit showImageSignal(qimage);
+}
+#endif
+
 /** MLT PLAYLIST DIRECT MANIPULATON  **/
 
 
-void Render::mltCheckLength()
+void Render::mltCheckLength(Mlt::Tractor *tractor)
 {
     //kDebug()<<"checking track length: "<<track<<"..........";
 
-    Mlt::Service service(m_mltProducer->get_service());
-    Mlt::Tractor tractor(service);
-
-    int trackNb = tractor.count();
+    int trackNb = tractor->count();
     int duration = 0;
     int trackDuration;
     if (trackNb == 1) {
-        Mlt::Producer trackProducer(tractor.track(0));
+        Mlt::Producer trackProducer(tractor->track(0));
         duration = trackProducer.get_playtime() - 1;
         m_mltProducer->set("out", duration);
         emit durationChanged(duration);
         return;
     }
     while (trackNb > 1) {
-        Mlt::Producer trackProducer(tractor.track(trackNb - 1));
+        Mlt::Producer trackProducer(tractor->track(trackNb - 1));
         trackDuration = trackProducer.get_playtime() - 1;
-        //kDebug() << " / / /DURATON FOR TRACK " << trackNb - 1 << " = " << trackDuration;
+        // kDebug() << " / / /DURATON FOR TRACK " << trackNb - 1 << " = " << trackDuration;
         if (trackDuration > duration) duration = trackDuration;
         trackNb--;
     }
 
-    Mlt::Producer blackTrackProducer(tractor.track(0));
+    Mlt::Producer blackTrackProducer(tractor->track(0));
 
     if (blackTrackProducer.get_playtime() - 1 != duration) {
         Mlt::Playlist blackTrackPlaylist((mlt_playlist) blackTrackProducer.get_service());
         Mlt::Producer *blackclip = blackTrackPlaylist.get_clip(0);
-        if (duration > m_blackClip->get_length()) {
-            m_blackClip->set("length", duration);
-           m_blackClip->set("out", duration - 1);
-            if (blackclip) blackclip->set("length", duration);
+        if (blackclip && blackclip->is_blank()) {
+            delete blackclip;
+            blackclip = NULL;
         }
-        if (blackclip == NULL || blackclip->is_blank() || blackTrackPlaylist.count() != 1) {
+
+        if (blackclip == NULL || blackTrackPlaylist.count() != 1) {
             blackTrackPlaylist.clear();
-            blackTrackPlaylist.append(*m_blackClip, 0, duration - 1);
-        } else blackTrackPlaylist.resize_clip(0, 0, duration - 1);
+            m_blackClip->set("length", duration + 1);
+            m_blackClip->set("out", duration);
+            blackclip = m_blackClip->cut(0, duration);
+            blackTrackPlaylist.insert_at(0, blackclip, 1);
+        } else {
+            if (duration > blackclip->parent().get_length()) {
+                blackclip->parent().set("length", duration + 1);
+                blackclip->parent().set("out", duration);
+                blackclip->set("length", duration + 1);
+            }
+            blackTrackPlaylist.resize_clip(0, 0, duration);
+        }
+
         delete blackclip;
         m_mltProducer->set("out", duration);
         emit durationChanged(duration);
     }
 }
 
-void Render::mltInsertClip(ItemInfo info, QDomElement element, Mlt::Producer *prod)
+int Render::mltInsertClip(ItemInfo info, QDomElement element, Mlt::Producer *prod, bool overwrite, bool push)
 {
     if (m_mltProducer == NULL) {
         kDebug() << "PLAYLIST NOT INITIALISED //////";
-        return;
+        return -1;
+    }
+    if (prod == NULL) {
+        kDebug() << "Cannot insert clip without producer //////";
+        return -1;
     }
     Mlt::Producer parentProd(m_mltProducer->parent());
     if (parentProd.get_producer() == NULL) {
         kDebug() << "PLAYLIST BROKEN, CANNOT INSERT CLIP //////";
-        return;
+        return -1;
     }
 
     Mlt::Service service(parentProd.get_service());
+    if (service.type() != tractor_type) {
+        kWarning() << "// TRACTOR PROBLEM";
+        return -1;
+    }
     Mlt::Tractor tractor(service);
     if (info.track > tractor.count() - 1) {
         kDebug() << "ERROR TRYING TO INSERT CLIP ON TRACK " << info.track << ", at POS: " << info.startPos.frames(25);
-        return;
+        return -1;
     }
     mlt_service_lock(service.get_service());
     Mlt::Producer trackProducer(tractor.track(info.track));
+    int trackDuration = trackProducer.get_playtime() - 1;
     Mlt::Playlist trackPlaylist((mlt_playlist) trackProducer.get_service());
     //kDebug()<<"/// INSERT cLIP: "<<info.cropStart.frames(m_fps)<<", "<<info.startPos.frames(m_fps)<<"-"<<info.endPos.frames(m_fps);
 
@@ -1472,19 +1614,36 @@ void Render::mltInsertClip(ItemInfo info, QDomElement element, Mlt::Producer *pr
             m_slowmotionProducers.insert(url, slowprod);
         }
         prod = slowprod;
+        if (prod == NULL || !prod->is_valid()) {
+            mlt_service_unlock(service.get_service());
+            return -1;
+        }
     }
-
-    Mlt::Producer *clip = prod->cut((int) info.cropStart.frames(m_fps), (int)(info.endPos - info.startPos + info.cropStart).frames(m_fps) - 1);
-    int newIndex = trackPlaylist.insert_at((int) info.startPos.frames(m_fps), clip, 1);
+    int cutPos = (int) info.cropStart.frames(m_fps);
+    int insertPos = (int) info.startPos.frames(m_fps);
+    int cutDuration = (int)(info.endPos - info.startPos).frames(m_fps) - 1;
+    Mlt::Producer *clip = prod->cut(cutPos, cutDuration + cutPos);
+    if (overwrite && (insertPos < trackDuration)) {
+        // Replace zone with blanks
+        //trackPlaylist.split_at(insertPos, true);
+        trackPlaylist.remove_region(insertPos, cutDuration + 1);
+        int clipIndex = trackPlaylist.get_clip_index_at(insertPos);
+        trackPlaylist.insert_blank(clipIndex, cutDuration);
+    } else if (push) {
+        trackPlaylist.split_at(insertPos, true);
+        int clipIndex = trackPlaylist.get_clip_index_at(insertPos);
+        trackPlaylist.insert_blank(clipIndex, cutDuration);
+    }
+    int newIndex = trackPlaylist.insert_at(insertPos, clip, 1);
     delete clip;
     /*if (QString(prod->get("transparency")).toInt() == 1)
         mltAddClipTransparency(info, info.track - 1, QString(prod->get("id")).toInt());*/
 
+    if (info.track != 0 && (newIndex + 1 == trackPlaylist.count())) mltCheckLength(&tractor);
     mlt_service_unlock(service.get_service());
-
-    if (info.track != 0 && (newIndex + 1 == trackPlaylist.count())) mltCheckLength();
-    //tractor.multitrack()->refresh();
-    //tractor.refresh();
+    /*tractor.multitrack()->refresh();
+    tractor.refresh();*/
+    return 0;
 }
 
 
@@ -1494,7 +1653,10 @@ void Render::mltCutClip(int track, GenTime position)
     m_isBlocked = true;
 
     Mlt::Service service(m_mltProducer->parent().get_service());
-    if (service.type() != tractor_type) kWarning() << "// TRACTOR PROBLEM";
+    if (service.type() != tractor_type) {
+        kWarning() << "// TRACTOR PROBLEM";
+        return;
+    }
 
     Mlt::Tractor tractor(service);
     Mlt::Producer trackProducer(tractor.track(track));
@@ -1568,18 +1730,58 @@ void Render::mltCutClip(int track, GenTime position)
     m_isBlocked = false;
 }
 
-void Render::mltUpdateClip(ItemInfo info, QDomElement element, Mlt::Producer *prod)
+bool Render::mltUpdateClip(ItemInfo info, QDomElement element, Mlt::Producer *prod)
 {
     // TODO: optimize
-    mltRemoveClip(info.track, info.startPos);
-    mltInsertClip(info, element, prod);
+    if (prod == NULL) {
+        kDebug() << "Cannot update clip with null producer //////";
+        return false;
+    }
+    Mlt::Service service(m_mltProducer->parent().get_service());
+    if (service.type() != tractor_type) {
+        kWarning() << "// TRACTOR PROBLEM";
+        return false;
+    }
+    Mlt::Tractor tractor(service);
+    Mlt::Producer trackProducer(tractor.track(info.track));
+    Mlt::Playlist trackPlaylist((mlt_playlist) trackProducer.get_service());
+    int startPos = info.startPos.frames(m_fps);
+    int clipIndex = trackPlaylist.get_clip_index_at(startPos);
+    Mlt::Producer *clip = trackPlaylist.get_clip(clipIndex);
+
+    // keep effects
+    QList <Mlt::Filter *> filtersList;
+    Mlt::Service sourceService(clip->get_service());
+    int ct = 0;
+    Mlt::Filter *filter = sourceService.filter(ct);
+    while (filter) {
+        if (filter->get("kdenlive_ix") != 0) {
+            filtersList.append(filter);
+        }
+        ct++;
+        filter = sourceService.filter(ct);
+    }
+    if (!mltRemoveClip(info.track, info.startPos)) return false;
+    if (mltInsertClip(info, element, prod) == -1) return false;
+    if (!filtersList.isEmpty()) {
+        clipIndex = trackPlaylist.get_clip_index_at(startPos);
+        Mlt::Producer *destclip = trackPlaylist.get_clip(clipIndex);
+        Mlt::Service destService(destclip->get_service());
+        delete destclip;
+        for (int i = 0; i < filtersList.count(); i++)
+            destService.attach(*(filtersList.at(i)));
+    }
+    return true;
 }
 
 
 bool Render::mltRemoveClip(int track, GenTime position)
 {
     Mlt::Service service(m_mltProducer->parent().get_service());
-    if (service.type() != tractor_type) kWarning() << "// TRACTOR PROBLEM";
+    if (service.type() != tractor_type) {
+        kWarning() << "// TRACTOR PROBLEM";
+        return false;
+    }
 
     Mlt::Tractor tractor(service);
     mlt_service_lock(service.get_service());
@@ -1604,7 +1806,7 @@ bool Render::mltRemoveClip(int track, GenTime position)
     //kDebug()<<"////  Deleting at: "<< (int) position.frames(m_fps) <<" --------------------------------------";
     m_isBlocked = true;
     Mlt::Producer *clip = trackPlaylist.replace_with_blank(clipIndex);
-    delete clip;
+    if (clip) delete clip;
     trackPlaylist.consolidate_blanks(0);
     /*if (QString(clip.parent().get("transparency")).toInt() == 1)
         mltDeleteTransparency((int) position.frames(m_fps), track, QString(clip.parent().get("id")).toInt());*/
@@ -1619,7 +1821,7 @@ bool Render::mltRemoveClip(int track, GenTime position)
     kDebug()<<"CLIP "<<i<<": ("<<blankStart<<'x'<<blankStart + blankDuration<<")"<<blk;
     }*/
     mlt_service_unlock(service.get_service());
-    if (track != 0 && trackPlaylist.count() <= clipIndex) mltCheckLength();
+    if (track != 0 && trackPlaylist.count() <= clipIndex) mltCheckLength(&tractor);
     m_isBlocked = false;
     return true;
 }
@@ -1628,12 +1830,12 @@ int Render::mltGetSpaceLength(const GenTime pos, int track, bool fromBlankStart)
 {
     if (!m_mltProducer) {
         kDebug() << "PLAYLIST NOT INITIALISED //////";
-        return -1;
+        return 0;
     }
     Mlt::Producer parentProd(m_mltProducer->parent());
     if (parentProd.get_producer() == NULL) {
         kDebug() << "PLAYLIST BROKEN, CANNOT INSERT CLIP //////";
-        return -1;
+        return 0;
     }
 
     Mlt::Service service(parentProd.get_service());
@@ -1643,7 +1845,11 @@ int Render::mltGetSpaceLength(const GenTime pos, int track, bool fromBlankStart)
     Mlt::Producer trackProducer(tractor.track(track));
     Mlt::Playlist trackPlaylist((mlt_playlist) trackProducer.get_service());
     int clipIndex = trackPlaylist.get_clip_index_at(insertPos);
-    if (!trackPlaylist.is_blank(clipIndex)) return -1;
+    if (clipIndex == trackPlaylist.count()) {
+        // We are after the end of the playlist
+        return -1;
+    }
+    if (!trackPlaylist.is_blank(clipIndex)) return 0;
     if (fromBlankStart) return trackPlaylist.clip_length(clipIndex);
     return trackPlaylist.clip_length(clipIndex) + trackPlaylist.clip_start(clipIndex) - insertPos;
 }
@@ -1696,16 +1902,19 @@ void Render::mltInsertSpace(QMap <int, int> trackClipStartList, QMap <int, int>
         if (insertPos != -1) {
             insertPos += offset;
             int clipIndex = trackPlaylist.get_clip_index_at(insertPos);
-            if (diff > 0) trackPlaylist.insert_blank(clipIndex, diff - 1);
-            else {
+            if (diff > 0) {
+                trackPlaylist.insert_blank(clipIndex, diff - 1);
+            } else {
                 if (!trackPlaylist.is_blank(clipIndex)) clipIndex --;
-                if (!trackPlaylist.is_blank(clipIndex)) kDebug() << "//// ERROR TRYING TO DELETE SPACE FROM " << insertPos;
+                if (!trackPlaylist.is_blank(clipIndex)) {
+                    kDebug() << "//// ERROR TRYING TO DELETE SPACE FROM " << insertPos;
+                }
                 int position = trackPlaylist.clip_start(clipIndex);
                 int blankDuration = trackPlaylist.clip_length(clipIndex);
                 diff = -diff;
-                if (blankDuration - diff == 0)
+                if (blankDuration - diff == 0) {
                     trackPlaylist.remove(clipIndex);
-                else trackPlaylist.remove_region(position, diff);
+                else trackPlaylist.remove_region(position, diff);
             }
             trackPlaylist.consolidate_blanks(0);
         }
@@ -1757,15 +1966,20 @@ void Render::mltInsertSpace(QMap <int, int> trackClipStartList, QMap <int, int>
 
 
                 int clipIndex = trackPlaylist.get_clip_index_at(insertPos);
-                if (diff > 0) trackPlaylist.insert_blank(clipIndex, diff - 1);
-                else {
-                    if (!trackPlaylist.is_blank(clipIndex)) clipIndex --;
-                    if (!trackPlaylist.is_blank(clipIndex)) kDebug() << "//// ERROR TRYING TO DELETE SPACE FROM " << insertPos;
+                if (diff > 0) {
+                    trackPlaylist.insert_blank(clipIndex, diff - 1);
+                } else {
+                    if (!trackPlaylist.is_blank(clipIndex)) {
+                        clipIndex --;
+                    }
+                    if (!trackPlaylist.is_blank(clipIndex)) {
+                        kDebug() << "//// ERROR TRYING TO DELETE SPACE FROM " << insertPos;
+                    }
                     int position = trackPlaylist.clip_start(clipIndex);
                     int blankDuration = trackPlaylist.clip_length(clipIndex);
-                    if (diff + blankDuration == 0)
+                    if (diff + blankDuration == 0) {
                         trackPlaylist.remove(clipIndex);
-                    else trackPlaylist.remove_region(position, - diff);
+                    else trackPlaylist.remove_region(position, - diff);
                 }
                 trackPlaylist.consolidate_blanks(0);
             }
@@ -1798,13 +2012,14 @@ void Render::mltInsertSpace(QMap <int, int> trackClipStartList, QMap <int, int>
         }
     }
     mlt_service_unlock(service.get_service());
-    mltCheckLength();
+    mltCheckLength(&tractor);
     m_mltConsumer->set("refresh", 1);
 }
 
 
 void Render::mltPasteEffects(Mlt::Producer *source, Mlt::Producer *dest)
 {
+    if (source == dest) return;
     Mlt::Service sourceService(source->get_service());
     Mlt::Service destService(dest->get_service());
 
@@ -1820,12 +2035,15 @@ void Render::mltPasteEffects(Mlt::Producer *source, Mlt::Producer *dest)
     }
 }
 
-int Render::mltChangeClipSpeed(ItemInfo info, double speed, double oldspeed, int strobe, Mlt::Producer *prod)
+int Render::mltChangeClipSpeed(ItemInfo info, ItemInfo speedIndependantInfo, double speed, double oldspeed, int strobe, Mlt::Producer *prod)
 {
     m_isBlocked = true;
     int newLength = 0;
     Mlt::Service service(m_mltProducer->parent().get_service());
-    if (service.type() != tractor_type) kWarning() << "// TRACTOR PROBLEM";
+    if (service.type() != tractor_type) {
+        kWarning() << "// TRACTOR PROBLEM";
+        return -1;
+    }
     //kDebug() << "Changing clip speed, set in and out: " << info.cropStart.frames(m_fps) << " to " << (info.endPos - info.startPos).frames(m_fps) - 1;
     Mlt::Tractor tractor(service);
     Mlt::Producer trackProducer(tractor.track(info.track));
@@ -1834,19 +2052,19 @@ int Render::mltChangeClipSpeed(ItemInfo info, double speed, double oldspeed, int
     int clipIndex = trackPlaylist.get_clip_index_at(startPos);
     int clipLength = trackPlaylist.clip_length(clipIndex);
 
-    Mlt::Producer *clip = trackPlaylist.get_clip(clipIndex);
-    if (clip == NULL) {
+    Mlt::Producer *original = trackPlaylist.get_clip(clipIndex);
+    if (original == NULL) {
         return -1;
     }
-    if (!clip->is_valid() || clip->is_blank()) {
+    if (!original->is_valid() || original->is_blank()) {
         // invalid clip
-        delete clip;
+        delete original;
         return -1;
     }
-    Mlt::Producer clipparent = clip->parent();
+    Mlt::Producer clipparent = original->parent();
     if (!clipparent.is_valid() || clipparent.is_blank()) {
         // invalid clip
-        delete clip;
+        delete original;
         return -1;
     }
 
@@ -1860,8 +2078,8 @@ int Render::mltChangeClipSpeed(ItemInfo info, double speed, double oldspeed, int
         if (strobe > 1) url.append("&strobe=" + QString::number(strobe));
         Mlt::Producer *slowprod = m_slowmotionProducers.value(url);
         if (!slowprod || slowprod->get_producer() == NULL) {
-            char *tmp = decodedString(url);
-            slowprod = new Mlt::Producer(*m_mltProfile, "framebuffer", tmp);
+            char *tmp = decodedString("framebuffer:" + url);
+            slowprod = new Mlt::Producer(*m_mltProfile, 0, tmp);
             if (strobe > 1) slowprod->set("strobe", strobe);
             delete[] tmp;
             QString producerid = "slowmotion:" + id + ':' + QString::number(speed);
@@ -1869,10 +2087,22 @@ int Render::mltChangeClipSpeed(ItemInfo info, double speed, double oldspeed, int
             tmp = decodedString(producerid);
             slowprod->set("id", tmp);
             delete[] tmp;
+            // copy producer props
+            double ar = original->parent().get_double("force_aspect_ratio");
+            if (ar != 0.0) slowprod->set("force_aspect_ratio", ar);
+            double fps = original->parent().get_double("force_fps");
+            if (fps != 0.0) slowprod->set("force_fps", fps);
+            int threads = original->parent().get_int("threads");
+            if (threads != 0) slowprod->set("threads", threads);
+            if (original->parent().get("force_progressive"))
+                slowprod->set("force_progressive", original->parent().get_int("force_progressive"));
+            int ix = original->parent().get_int("video_index");
+            if (ix != 0) slowprod->set("video_index", ix);
             m_slowmotionProducers.insert(url, slowprod);
         }
         Mlt::Producer *clip = trackPlaylist.replace_with_blank(clipIndex);
         trackPlaylist.consolidate_blanks(0);
+
         // Check that the blank space is long enough for our new duration
         clipIndex = trackPlaylist.get_clip_index_at(startPos);
         int blankEnd = trackPlaylist.clip_start(clipIndex) + trackPlaylist.clip_length(clipIndex);
@@ -1886,7 +2116,7 @@ int Render::mltChangeClipSpeed(ItemInfo info, double speed, double oldspeed, int
         mltPasteEffects(clip, cut);
         trackPlaylist.insert_at(startPos, cut, 1);
         delete cut;
-       delete clip;
+        delete clip;
         clipIndex = trackPlaylist.get_clip_index_at(startPos);
         newLength = trackPlaylist.clip_length(clipIndex);
         mlt_service_unlock(service.get_service());
@@ -1901,19 +2131,18 @@ int Render::mltChangeClipSpeed(ItemInfo info, double speed, double oldspeed, int
         int blankEnd = trackPlaylist.clip_start(clipIndex) + trackPlaylist.clip_length(clipIndex);
 
         Mlt::Producer *cut;
-        GenTime oldDuration = GenTime(clipLength, m_fps);
-        GenTime newDuration = oldDuration * oldspeed;
-        if (clipIndex + 1 < trackPlaylist.count() && (info.startPos + newDuration).frames(m_fps) > blankEnd) {
+        int originalStart = (int)(speedIndependantInfo.cropStart.frames(m_fps));
+        if (clipIndex + 1 < trackPlaylist.count() && (info.startPos + speedIndependantInfo.cropDuration).frames(m_fps) > blankEnd) {
             GenTime maxLength = GenTime(blankEnd, m_fps) - info.startPos;
-            cut = prod->cut((int)(info.cropStart.frames(m_fps)), (int)(info.cropStart.frames(m_fps) + maxLength.frames(m_fps) - 1));
-        } else cut = prod->cut((int)(info.cropStart.frames(m_fps)), (int)((info.cropStart + newDuration).frames(m_fps)) - 1);
+            cut = prod->cut(originalStart, (int)(originalStart + maxLength.frames(m_fps) - 1));
+        } else cut = prod->cut(originalStart, (int)(originalStart + speedIndependantInfo.cropDuration.frames(m_fps)) - 1);
 
         // move all effects to the correct producer
         mltPasteEffects(clip, cut);
 
         trackPlaylist.insert_at(startPos, cut, 1);
         delete cut;
-       delete clip;
+        delete clip;
         clipIndex = trackPlaylist.get_clip_index_at(startPos);
         newLength = trackPlaylist.clip_length(clipIndex);
         mlt_service_unlock(service.get_service());
@@ -1926,8 +2155,8 @@ int Render::mltChangeClipSpeed(ItemInfo info, double speed, double oldspeed, int
         if (strobe > 1) url.append("&strobe=" + QString::number(strobe));
         Mlt::Producer *slowprod = m_slowmotionProducers.value(url);
         if (!slowprod || slowprod->get_producer() == NULL) {
-            char *tmp = decodedString(url);
-            slowprod = new Mlt::Producer(*m_mltProfile, "framebuffer", tmp);
+            char *tmp = decodedString("framebuffer:" + url);
+            slowprod = new Mlt::Producer(*m_mltProfile, 0, tmp);
             delete[] tmp;
             slowprod->set("strobe", strobe);
             QString producerid = "slowmotion:" + id.section(':', 1, 1) + ':' + QString::number(speed);
@@ -1935,38 +2164,48 @@ int Render::mltChangeClipSpeed(ItemInfo info, double speed, double oldspeed, int
             tmp = decodedString(producerid);
             slowprod->set("id", tmp);
             delete[] tmp;
+            // copy producer props
+            double ar = original->parent().get_double("force_aspect_ratio");
+            if (ar != 0.0) slowprod->set("force_aspect_ratio", ar);
+            double fps = original->parent().get_double("force_fps");
+            if (fps != 0.0) slowprod->set("force_fps", fps);
+            if (original->parent().get("force_progressive"))
+                slowprod->set("force_progressive", original->parent().get_int("force_progressive"));
+            int threads = original->parent().get_int("threads");
+            if (threads != 0) slowprod->set("threads", threads);
+            int ix = original->parent().get_int("video_index");
+            if (ix != 0) slowprod->set("video_index", ix);
             m_slowmotionProducers.insert(url, slowprod);
         }
         Mlt::Producer *clip = trackPlaylist.replace_with_blank(clipIndex);
         trackPlaylist.consolidate_blanks(0);
 
-        GenTime oldDuration = GenTime(clipLength, m_fps);
-        GenTime newDuration = oldDuration * (oldspeed / speed);
+        GenTime duration = speedIndependantInfo.cropDuration / speed;
+        int originalStart = (int)(speedIndependantInfo.cropStart.frames(m_fps) / speed);
 
         // Check that the blank space is long enough for our new duration
         clipIndex = trackPlaylist.get_clip_index_at(startPos);
         int blankEnd = trackPlaylist.clip_start(clipIndex) + trackPlaylist.clip_length(clipIndex);
 
         Mlt::Producer *cut;
-        if (clipIndex + 1 < trackPlaylist.count() && (info.startPos + newDuration).frames(m_fps) > blankEnd) {
+        if (clipIndex + 1 < trackPlaylist.count() && (info.startPos + duration).frames(m_fps) > blankEnd) {
             GenTime maxLength = GenTime(blankEnd, m_fps) - info.startPos;
-            cut = slowprod->cut((int)(info.cropStart.frames(m_fps) / speed), (int)(info.cropStart.frames(m_fps) / speed + maxLength.frames(m_fps) - 1));
-        } else cut = slowprod->cut((int)(info.cropStart.frames(m_fps) / speed), (int)((info.cropStart / speed + newDuration).frames(m_fps) - 1));
+            cut = slowprod->cut(originalStart, (int)(originalStart + maxLength.frames(m_fps) - 1));
+        } else cut = slowprod->cut(originalStart, (int)(originalStart + duration.frames(m_fps)) - 1);
 
         // move all effects to the correct producer
         mltPasteEffects(clip, cut);
 
         trackPlaylist.insert_at(startPos, cut, 1);
         delete cut;
-       delete clip;
+        delete clip;
         clipIndex = trackPlaylist.get_clip_index_at(startPos);
         newLength = trackPlaylist.clip_length(clipIndex);
 
         mlt_service_unlock(service.get_service());
     }
-
-    delete clip;
-    if (clipIndex + 1 == trackPlaylist.count()) mltCheckLength();
+    delete original;
+    if (clipIndex + 1 == trackPlaylist.count()) mltCheckLength(&tractor);
     m_isBlocked = false;
     return newLength;
 }
@@ -2022,14 +2261,46 @@ bool Render::mltAddEffect(int track, GenTime position, EffectsParameterList para
     }
     Mlt::Service clipService(clip->get_service());
     m_isBlocked = true;
+    int duration = clip->get_playtime();
+    bool updateIndex = false;
     delete clip;
-    // temporarily remove all effects after insert point
-    QList <Mlt::Filter *> filtersList;
+
     const int filter_ix = params.paramValue("kdenlive_ix").toInt();
     int ct = 0;
     Mlt::Filter *filter = clipService.filter(ct);
     while (filter) {
-        if (QString(filter->get("kdenlive_ix")).toInt() > filter_ix) {
+        if (QString(filter->get("kdenlive_ix")).toInt() == filter_ix) {
+            // A filter at that position already existed, so we will increase all indexes later
+            updateIndex = true;
+            break;
+        }
+        ct++;
+        filter = clipService.filter(ct);
+    }
+
+    if (params.paramValue("id") == "speed") {
+        // special case, speed effect is not really inserted, we just update the other effects index (kdenlive_ix)
+        ct = 0;
+        filter = clipService.filter(ct);
+        while (filter) {
+            if (QString(filter->get("kdenlive_ix")).toInt() >= filter_ix) {
+                if (updateIndex) filter->set("kdenlive_ix", QString(filter->get("kdenlive_ix")).toInt() + 1);
+            }
+            ct++;
+            filter = clipService.filter(ct);
+        }
+        m_isBlocked = false;
+        if (doRefresh) refresh();
+        return true;
+    }
+
+
+    // temporarily remove all effects after insert point
+    QList <Mlt::Filter *> filtersList;
+    ct = 0;
+    filter = clipService.filter(ct);
+    while (filter) {
+        if (QString(filter->get("kdenlive_ix")).toInt() >= filter_ix) {
             filtersList.append(filter);
             clipService.detach(*filter);
         } else ct++;
@@ -2051,7 +2322,6 @@ bool Render::mltAddEffect(int track, GenTime position, EffectsParameterList para
         char *starttag = decodedString(params.paramValue("starttag", "start"));
         char *endtag = decodedString(params.paramValue("endtag", "end"));
         kDebug() << "// ADDING KEYFRAME TAGS: " << starttag << ", " << endtag;
-        int duration = clip->get_playtime();
         //double max = params.paramValue("max").toDouble();
         double min = params.paramValue("min").toDouble();
         double factor = params.paramValue("factor", "1").toDouble();
@@ -2137,9 +2407,11 @@ bool Render::mltAddEffect(int track, GenTime position, EffectsParameterList para
 
     // re-add following filters
     for (int i = 0; i < filtersList.count(); i++) {
-        clipService.attach(*(filtersList.at(i)));
+        Mlt::Filter *filter = filtersList.at(i);
+        if (updateIndex)
+            filter->set("kdenlive_ix", QString(filter->get("kdenlive_ix")).toInt() + 1);
+        clipService.attach(*filter);
     }
-
     m_isBlocked = false;
     if (doRefresh) refresh();
     return true;
@@ -2174,6 +2446,19 @@ bool Render::mltEditEffect(int track, GenTime position, EffectsParameterList par
     m_isBlocked = true;
     int ct = 0;
     Mlt::Filter *filter = clipService.filter(ct);
+
+    /*
+    kDebug() << "EDITING FILTER: "<<index <<", "<<tag;
+    kDebug() << "EFFect stack: ++++++++++++++++++++++++++";
+    while (filter) {
+        kDebug() << "Filter: "<< filter->get("kdenlive_id") <<", IX: "<<filter->get("kdenlive_ix");
+        ct++;
+        filter = clipService.filter(ct);
+    }
+    kDebug() << "++++++++++++++++++++++++++";
+    */
+    ct = 0;
+    filter = clipService.filter(ct);
     while (filter) {
         if (filter->get("kdenlive_ix") == index) {
             break;
@@ -2183,24 +2468,10 @@ bool Render::mltEditEffect(int track, GenTime position, EffectsParameterList par
     }
 
     if (!filter) {
-        kDebug() << "WARINIG, FILTER FOR EDITING NOT FOUND, ADDING IT!!!!!";
+        kDebug() << "WARINIG, FILTER FOR EDITING NOT FOUND, ADDING IT! " << index << ", " << tag;
         // filter was not found, it was probably a disabled filter, so add it to the correct place...
-        int ct = 0;
-        filter = clipService.filter(ct);
-        QList <Mlt::Filter *> filtersList;
-        while (filter) {
-            if (QString(filter->get("kdenlive_ix")).toInt() > index.toInt()) {
-                filtersList.append(filter);
-                clipService.detach(*filter);
-            } else ct++;
-            filter = clipService.filter(ct);
-        }
-        bool success = mltAddEffect(track, position, params);
-
-        for (int i = 0; i < filtersList.count(); i++) {
-            clipService.attach(*(filtersList.at(i)));
-        }
 
+        bool success = mltAddEffect(track, position, params);
         m_isBlocked = false;
         return success;
     }
@@ -2219,6 +2490,38 @@ bool Render::mltEditEffect(int track, GenTime position, EffectsParameterList par
     return true;
 }
 
+void Render::mltUpdateEffectPosition(int track, GenTime position, int oldPos, int newPos)
+{
+
+    kDebug() << "MOVING EFFECT FROM " << oldPos << ", TO: " << newPos;
+    Mlt::Service service(m_mltProducer->parent().get_service());
+
+    Mlt::Tractor tractor(service);
+    Mlt::Producer trackProducer(tractor.track(track));
+    Mlt::Playlist trackPlaylist((mlt_playlist) trackProducer.get_service());
+    //int clipIndex = trackPlaylist.get_clip_index_at(position.frames(m_fps));
+    Mlt::Producer *clip = trackPlaylist.get_clip_at((int) position.frames(m_fps));
+    if (!clip) {
+        kDebug() << "WARINIG, CANNOT FIND CLIP ON track: " << track << ", AT POS: " << position.frames(m_fps);
+        return;
+    }
+    Mlt::Service clipService(clip->get_service());
+    delete clip;
+    m_isBlocked = true;
+    int ct = 0;
+    Mlt::Filter *filter = clipService.filter(ct);
+    while (filter) {
+        int pos = QString(filter->get("kdenlive_ix")).toInt();
+        if (pos == oldPos) {
+            filter->set("kdenlive_ix", newPos);
+        } else ct++;
+        filter = clipService.filter(ct);
+    }
+
+    m_isBlocked = false;
+    refresh();
+}
+
 void Render::mltMoveEffect(int track, GenTime position, int oldPos, int newPos)
 {
 
@@ -2324,7 +2627,7 @@ bool Render::mltResizeClipEnd(ItemInfo info, GenTime clipDuration)
     int diff = newDuration - (trackPlaylist.clip_length(clipIndex) - 1);
     if (newDuration > clip->get_length()) {
         clip->parent().set("length", newDuration + 1);
-       clip->parent().set("out", newDuration);
+        clip->parent().set("out", newDuration);
         clip->set("length", newDuration + 1);
     }
     if (newDuration > clip->get_out()) {
@@ -2344,7 +2647,9 @@ bool Render::mltResizeClipEnd(ItemInfo info, GenTime clipDuration)
             if (trackPlaylist.is_blank(clipIndex)) {
                 int blankStart = trackPlaylist.clip_start(clipIndex);
                 int blankDuration = trackPlaylist.clip_length(clipIndex);
-                if (diff > blankDuration) kDebug() << "// ERROR blank clip is not large enough to get back required space!!!";
+                if (diff > blankDuration) {
+                    kDebug() << "// ERROR blank clip is not large enough to get back required space!!!";
+                }
                 if (diff - blankDuration == 0) {
                     trackPlaylist.remove(clipIndex);
                 } else trackPlaylist.remove_region(blankStart, diff);
@@ -2352,11 +2657,11 @@ bool Render::mltResizeClipEnd(ItemInfo info, GenTime clipDuration)
                 kDebug() << "/// RESIZE ERROR, NXT CLIP IS NOT BLK: " << clipIndex;
             }
         }
-    } else trackPlaylist.insert_blank(clipIndex, 0 - diff - 1);
+    } else if (clipIndex != trackPlaylist.count()) trackPlaylist.insert_blank(clipIndex, 0 - diff - 1);
     trackPlaylist.consolidate_blanks(0);
     mlt_service_unlock(service.get_service());
 
-    if (info.track != 0 && clipIndex == trackPlaylist.count()) mltCheckLength();
+    if (info.track != 0 && clipIndex == trackPlaylist.count()) mltCheckLength(&tractor);
     /*if (QString(clip->parent().get("transparency")).toInt() == 1) {
         //mltResizeTransparency(previousStart, previousStart, previousStart + newDuration, track, QString(clip->parent().get("id")).toInt());
         mltDeleteTransparency(info.startPos.frames(m_fps), info.track, QString(clip->parent().get("id")).toInt());
@@ -2476,39 +2781,42 @@ bool Render::mltResizeClipStart(ItemInfo info, GenTime diff)
     return true;
 }
 
-bool Render::mltMoveClip(int startTrack, int endTrack, GenTime moveStart, GenTime moveEnd, Mlt::Producer *prod)
+bool Render::mltMoveClip(int startTrack, int endTrack, GenTime moveStart, GenTime moveEnd, Mlt::Producer *prod, bool overwrite, bool insert)
 {
-    return mltMoveClip(startTrack, endTrack, (int) moveStart.frames(m_fps), (int) moveEnd.frames(m_fps), prod);
+    return mltMoveClip(startTrack, endTrack, (int) moveStart.frames(m_fps), (int) moveEnd.frames(m_fps), prod, overwrite, insert);
 }
 
 
-void Render::mltUpdateClipProducer(int track, int pos, Mlt::Producer *prod)
+bool Render::mltUpdateClipProducer(int track, int pos, Mlt::Producer *prod)
 {
     if (prod == NULL || !prod->is_valid()) {
         kDebug() << "// Warning, CLIP on track " << track << ", at: " << pos << " is invalid, cannot update it!!!";
-        return;
+        return false;
     }
     kDebug() << "NEW PROD ID: " << prod->get("id");
     m_isBlocked++;
     kDebug() << "// TRYING TO UPDATE CLIP at: " << pos << ", TK: " << track;
-    mlt_service_lock(m_mltConsumer->get_service());
     Mlt::Service service(m_mltProducer->parent().get_service());
-    if (service.type() != tractor_type) kWarning() << "// TRACTOR PROBLEM";
+    if (service.type() != tractor_type) {
+        kWarning() << "// TRACTOR PROBLEM";
+        return false;
+    }
+    mlt_service_lock(m_mltConsumer->get_service());
 
     Mlt::Tractor tractor(service);
     Mlt::Producer trackProducer(tractor.track(track));
     Mlt::Playlist trackPlaylist((mlt_playlist) trackProducer.get_service());
-    int clipIndex = trackPlaylist.get_clip_index_at(pos + 1);
+    int clipIndex = trackPlaylist.get_clip_index_at(pos);
     Mlt::Producer *clipProducer = trackPlaylist.replace_with_blank(clipIndex);
-    if (clipProducer->is_blank()) {
+    if (clipProducer == NULL || clipProducer->is_blank()) {
         kDebug() << "// ERROR UPDATING CLIP PROD";
         delete clipProducer;
         mlt_service_unlock(m_mltConsumer->get_service());
         m_isBlocked--;
-        return;
+        return false;
     }
     Mlt::Producer *clip = prod->cut(clipProducer->get_in(), clipProducer->get_out());
-
+    if (!clip) return false;
     // move all effects to the correct producer
     mltPasteEffects(clipProducer, clip);
     trackPlaylist.insert_at(pos, clip, 1);
@@ -2516,14 +2824,18 @@ void Render::mltUpdateClipProducer(int track, int pos, Mlt::Producer *prod)
     delete clipProducer;
     mlt_service_unlock(m_mltConsumer->get_service());
     m_isBlocked--;
+    return true;
 }
 
-bool Render::mltMoveClip(int startTrack, int endTrack, int moveStart, int moveEnd, Mlt::Producer *prod)
+bool Render::mltMoveClip(int startTrack, int endTrack, int moveStart, int moveEnd, Mlt::Producer *prod, bool overwrite, bool insert)
 {
     m_isBlocked++;
 
     Mlt::Service service(m_mltProducer->parent().get_service());
-    if (service.type() != tractor_type) kWarning() << "// TRACTOR PROBLEM";
+    if (service.type() != tractor_type) {
+        kWarning() << "// TRACTOR PROBLEM";
+        return false;
+    }
 
     Mlt::Tractor tractor(service);
     mlt_service_lock(service.get_service());
@@ -2534,10 +2846,10 @@ bool Render::mltMoveClip(int startTrack, int endTrack, int moveStart, int moveEn
     bool checkLength = false;
     if (endTrack == startTrack) {
         Mlt::Producer *clipProducer = trackPlaylist.replace_with_blank(clipIndex);
-        if (!trackPlaylist.is_blank_at(moveEnd) || clipProducer->is_blank()) {
+        if (!overwrite && (!trackPlaylist.is_blank_at(moveEnd) || !clipProducer || clipProducer->is_blank())) {
             // error, destination is not empty
             if (!trackPlaylist.is_blank_at(moveEnd)) trackPlaylist.insert_at(moveStart, clipProducer, 1);
-            delete clipProducer;
+            if (clipProducer) delete clipProducer;
             //int ix = trackPlaylist.get_clip_index_at(moveEnd);
             kDebug() << "// ERROR MOVING CLIP TO : " << moveEnd;
             mlt_service_unlock(service.get_service());
@@ -2545,7 +2857,13 @@ bool Render::mltMoveClip(int startTrack, int endTrack, int moveStart, int moveEn
             return false;
         } else {
             trackPlaylist.consolidate_blanks(0);
+            if (overwrite) {
+                trackPlaylist.remove_region(moveEnd, clipProducer->get_playtime());
+                int clipIndex = trackPlaylist.get_clip_index_at(moveEnd);
+                trackPlaylist.insert_blank(clipIndex, clipProducer->get_playtime() - 1);
+            }
             int newIndex = trackPlaylist.insert_at(moveEnd, clipProducer, 1);
+            trackPlaylist.consolidate_blanks(1);
             delete clipProducer;
             /*if (QString(clipProducer.parent().get("transparency")).toInt() == 1) {
             mltMoveTransparency(moveStart, moveEnd, startTrack, endTrack, QString(clipProducer.parent().get("id")).toInt());
@@ -2556,17 +2874,17 @@ bool Render::mltMoveClip(int startTrack, int endTrack, int moveStart, int moveEn
     } else {
         Mlt::Producer destTrackProducer(tractor.track(endTrack));
         Mlt::Playlist destTrackPlaylist((mlt_playlist) destTrackProducer.get_service());
-        if (!destTrackPlaylist.is_blank_at(moveEnd)) {
+        if (!overwrite && !destTrackPlaylist.is_blank_at(moveEnd)) {
             // error, destination is not empty
             mlt_service_unlock(service.get_service());
             m_isBlocked--;
             return false;
         } else {
             Mlt::Producer *clipProducer = trackPlaylist.replace_with_blank(clipIndex);
-            if (clipProducer->is_blank()) {
+            if (!clipProducer || clipProducer->is_blank()) {
                 // error, destination is not empty
                 //int ix = trackPlaylist.get_clip_index_at(moveEnd);
-                delete clipProducer;
+                if (clipProducer) delete clipProducer;
                 kDebug() << "// ERROR MOVING CLIP TO : " << moveEnd;
                 mlt_service_unlock(service.get_service());
                 m_isBlocked--;
@@ -2593,10 +2911,21 @@ bool Render::mltMoveClip(int startTrack, int endTrack, int moveStart, int moveEn
             // move all effects to the correct producer
             mltPasteEffects(clipProducer, clip);
 
+            if (overwrite) {
+                destTrackPlaylist.remove_region(moveEnd, clip->get_playtime());
+                int clipIndex = destTrackPlaylist.get_clip_index_at(moveEnd);
+                destTrackPlaylist.insert_blank(clipIndex, clip->get_playtime() - 1);
+            }
+
             int newIndex = destTrackPlaylist.insert_at(moveEnd, clip, 1);
-            delete clip;
-            clip = NULL;
-            if (clipProducer) delete clipProducer;
+
+            if (clip == clipProducer) {
+                delete clip;
+                clip = NULL;
+            } else {
+                delete clip;
+                delete clipProducer;
+            }
             destTrackPlaylist.consolidate_blanks(0);
             /*if (QString(clipProducer.parent().get("transparency")).toInt() == 1) {
                 kDebug() << "//////// moving clip transparency";
@@ -2607,47 +2936,78 @@ bool Render::mltMoveClip(int startTrack, int endTrack, int moveStart, int moveEn
         }
     }
     mlt_service_unlock(service.get_service());
-    if (checkLength) mltCheckLength();
+    if (checkLength) mltCheckLength(&tractor);
     m_isBlocked--;
     //askForRefresh();
     //m_mltConsumer->set("refresh", 1);
     return true;
 }
 
+
+QList <int> Render::checkTrackSequence(int track)
+{
+    QList <int> list;
+    Mlt::Service service(m_mltProducer->parent().get_service());
+    if (service.type() != tractor_type) {
+        kWarning() << "// TRACTOR PROBLEM";
+        return list;
+    }
+    Mlt::Tractor tractor(service);
+    mlt_service_lock(service.get_service());
+    Mlt::Producer trackProducer(tractor.track(track));
+    Mlt::Playlist trackPlaylist((mlt_playlist) trackProducer.get_service());
+    int clipNb = trackPlaylist.count();
+    //kDebug() << "// PARSING SCENE TRACK: " << t << ", CLIPS: " << clipNb;
+    for (int i = 0; i < clipNb; i++) {
+        Mlt::Producer *c = trackPlaylist.get_clip(i);
+        int pos = trackPlaylist.clip_start(i);
+        if (!list.contains(pos)) list.append(pos);
+        pos += c->get_playtime();
+        if (!list.contains(pos)) list.append(pos);
+        delete c;
+    }
+    return list;
+}
+
 bool Render::mltMoveTransition(QString type, int startTrack, int newTrack, int newTransitionTrack, GenTime oldIn, GenTime oldOut, GenTime newIn, GenTime newOut)
 {
     int new_in = (int)newIn.frames(m_fps);
     int new_out = (int)newOut.frames(m_fps) - 1;
     if (new_in >= new_out) return false;
 
-    mlt_service serv = m_mltProducer->parent().get_service();
-    m_isBlocked++;
-    mlt_service_lock(serv);
-    //m_mltConsumer->set("refresh", 0);
+    Mlt::Service service(m_mltProducer->parent().get_service());
+    Mlt::Tractor tractor(service);
+    Mlt::Field *field = tractor.field();
 
+    m_isBlocked++;
+    mlt_service_lock(service.get_service());
 
-    mlt_service nextservice = mlt_service_get_producer(serv);
+    mlt_service nextservice = mlt_service_get_producer(service.get_service());
     mlt_properties properties = MLT_SERVICE_PROPERTIES(nextservice);
     QString mlt_type = mlt_properties_get(properties, "mlt_type");
     QString resource = mlt_properties_get(properties, "mlt_service");
     int old_pos = (int)(oldIn.frames(m_fps) + oldOut.frames(m_fps)) / 2;
+    bool found = false;
 
     while (mlt_type == "transition") {
-        mlt_transition tr = (mlt_transition) nextservice;
-        int currentTrack = mlt_transition_get_b_track(tr);
-        int currentIn = (int) mlt_transition_get_in(tr);
-        int currentOut = (int) mlt_transition_get_out(tr);
+        Mlt::Transition transition((mlt_transition) nextservice);
+        int currentTrack = transition.get_b_track();
+        int currentIn = (int) transition.get_in();
+        int currentOut = (int) transition.get_out();
 
         if (resource == type && startTrack == currentTrack && currentIn <= old_pos && currentOut >= old_pos) {
-            mlt_transition_set_in_and_out(tr, new_in, new_out);
+            found = true;
             if (newTrack - startTrack != 0) {
-                //kDebug() << "///// TRANSITION CHANGE TRACK. CUrrent (b): " << currentTrack << 'x' << mlt_transition_get_a_track(tr) << ", NEw: " << newTrack << 'x' << newTransitionTrack;
-
-                mlt_properties properties = MLT_TRANSITION_PROPERTIES(tr);
-                mlt_properties_set_int(properties, "a_track", newTransitionTrack);
-                mlt_properties_set_int(properties, "b_track", newTrack);
-                //kDebug() << "set new start & end :" << new_in << new_out<< "TR OFFSET: "<<trackOffset<<", TRACKS: "<<mlt_transition_get_a_track(tr)<<'x'<<mlt_transition_get_b_track(tr);
-            }
+                Mlt::Properties trans_props(transition.get_properties());
+                char *tmp = decodedString(transition.get("mlt_service"));
+                Mlt::Transition new_transition(*m_mltProfile, tmp);
+                delete[] tmp;
+                Mlt::Properties new_trans_props(new_transition.get_properties());
+                new_trans_props.inherit(trans_props);
+                new_transition.set_in_and_out(new_in, new_out);
+                field->disconnect_service(transition);
+                field->plant_transition(new_transition, newTransitionTrack, newTrack);
+            } else transition.set_in_and_out(new_in, new_out);
             break;
         }
         nextservice = mlt_service_producer(nextservice);
@@ -2656,11 +3016,11 @@ bool Render::mltMoveTransition(QString type, int startTrack, int newTrack, int n
         mlt_type = mlt_properties_get(properties, "mlt_type");
         resource = mlt_properties_get(properties, "mlt_service");
     }
-    mlt_service_unlock(serv);
+    mlt_service_unlock(service.get_service());
     m_isBlocked--;
     refresh();
     //if (m_isBlocked == 0) m_mltConsumer->set("refresh", 1);
-    return true;
+    return found;
 }
 
 void Render::mltUpdateTransition(QString oldTag, QString tag, int a_track, int b_track, GenTime in, GenTime out, QDomElement xml)
@@ -2702,6 +3062,7 @@ void Render::mltUpdateTransitionParams(QString type, int a_track, int b_track, G
             QString key;
             mlt_properties transproperties = MLT_TRANSITION_PROPERTIES(tr);
             mlt_properties_set_int(transproperties, "force_track", xml.attribute("force_track").toInt());
+            mlt_properties_set_int(transproperties, "automatic", xml.attribute("automatic", "0").toInt());
             // update the transition id in case it uses the same MLT service but different Kdenlive id
             char *tmp = decodedString(xml.attribute("id"));
             mlt_properties_set(transproperties, "kdenlive_id", tmp);
@@ -3000,7 +3361,7 @@ void Render::mltSavePlaylist()
     fileConsumer.start();
 }
 
-QList <Mlt::Producer *> Render::producersList()
+const QList <Mlt::Producer *> Render::producersList()
 {
     QList <Mlt::Producer *> prods;
     if (m_mltProducer == NULL) return prods;
@@ -3074,7 +3435,10 @@ void Render::mltInsertTrack(int ix, bool videoTrack)
 
     Mlt::Service service(m_mltProducer->parent().get_service());
     mlt_service_lock(service.get_service());
-    if (service.type() != tractor_type) kWarning() << "// TRACTOR PROBLEM";
+    if (service.type() != tractor_type) {
+        kWarning() << "// TRACTOR PROBLEM";
+        return;
+    }
 
     Mlt::Tractor tractor(service);
 
@@ -3171,7 +3535,13 @@ void Render::mltDeleteTrack(int ix)
             int a_track = mappedProps.value("a_track").toInt();
             int b_track = mappedProps.value("b_track").toInt();
             if (a_track > 0 && a_track >= ix) a_track --;
-            if (b_track > 0 && b_track >= ix) b_track --;
+            if (b_track > 0 && b_track > ix) b_track --;
+            if (b_track == ix) {
+                // transition was on the deleted track, so remove it
+                tractor.removeChild(transitions.at(i));
+                i--;
+                continue;
+            }
             for (int j = 0; j < props.count(); j++) {
                 QDomElement f = props.at(j).toElement();
                 if (f.attribute("name") == "a_track") f.firstChild().setNodeValue(QString::number(a_track));
@@ -3183,7 +3553,17 @@ void Render::mltDeleteTrack(int ix)
     tractor.removeChild(track);
     //kDebug() << "/////////// RESULT SCENE: \n" << doc.toString();
     setSceneList(doc.toString(), m_framePosition);
-    mltCheckLength();
+
+    /*    if (m_mltProducer != NULL) {
+            Mlt::Producer parentProd(m_mltProducer->parent());
+            if (parentProd.get_producer() != NULL) {
+                Mlt::Service service(parentProd.get_service());
+                if (service.type() == tractor_type) {
+                    Mlt::Tractor tractor(service);
+                    mltCheckLength(&tractor);
+                }
+            }
+        }*/
 }
 
 
@@ -3202,11 +3582,105 @@ void Render::updatePreviewSettings()
     int pos = 0;
     if (m_mltProducer) {
         pos = m_mltProducer->position();
-        delete m_mltProducer;
     }
-    m_mltProducer = NULL;
+
     setSceneList(scene, pos);
 }
 
+
+QString Render::updateSceneListFps(double current_fps, double new_fps, QString scene)
+{
+    // Update all frame positions to the new fps value
+    //WARNING: there are probably some effects or other that hold a frame value
+    // as parameter and will also need to be updated here!
+    QDomDocument doc;
+    doc.setContent(scene);
+
+    double factor = new_fps / current_fps;
+    QDomNodeList producers = doc.elementsByTagName("producer");
+    for (int i = 0; i < producers.count(); i++) {
+        QDomElement prod = producers.at(i).toElement();
+        prod.removeAttribute("in");
+        prod.removeAttribute("out");
+
+        QDomNodeList props = prod.childNodes();
+        for (int j = 0; j < props.count(); j++) {
+            QDomElement param =  props.at(j).toElement();
+            QString paramName = param.attribute("name");
+            if (paramName.startsWith("meta.") || paramName == "length") {
+                prod.removeChild(props.at(j));
+                j--;
+            }
+        }
+    }
+
+    QDomNodeList entries = doc.elementsByTagName("entry");
+    for (int i = 0; i < entries.count(); i++) {
+        QDomElement entry = entries.at(i).toElement();
+        int in = entry.attribute("in").toInt();
+        int out = entry.attribute("out").toInt();
+        in = factor * in + 0.5;
+        out = factor * out + 0.5;
+        entry.setAttribute("in", in);
+        entry.setAttribute("out", out);
+    }
+
+    QDomNodeList blanks = doc.elementsByTagName("blank");
+    for (int i = 0; i < blanks.count(); i++) {
+        QDomElement blank = blanks.at(i).toElement();
+        int length = blank.attribute("length").toInt();
+        length = factor * length + 0.5;
+        blank.setAttribute("length", QString::number(length));
+    }
+
+    QDomNodeList filters = doc.elementsByTagName("filter");
+    for (int i = 0; i < filters.count(); i++) {
+        QDomElement filter = filters.at(i).toElement();
+        int in = filter.attribute("in").toInt();
+        int out = filter.attribute("out").toInt();
+        in = factor * in + 0.5;
+        out = factor * out + 0.5;
+        filter.setAttribute("in", in);
+        filter.setAttribute("out", out);
+    }
+
+    QDomNodeList transitions = doc.elementsByTagName("transition");
+    for (int i = 0; i < transitions.count(); i++) {
+        QDomElement transition = transitions.at(i).toElement();
+        int in = transition.attribute("in").toInt();
+        int out = transition.attribute("out").toInt();
+        in = factor * in + 0.5;
+        out = factor * out + 0.5;
+        transition.setAttribute("in", in);
+        transition.setAttribute("out", out);
+        QDomNodeList props = transition.childNodes();
+        for (int j = 0; j < props.count(); j++) {
+            QDomElement param =  props.at(j).toElement();
+            QString paramName = param.attribute("name");
+            if (paramName == "geometry") {
+                QString geom = param.firstChild().nodeValue();
+                QStringList keys = geom.split(';');
+                QStringList newKeys;
+                for (int k = 0; k < keys.size(); ++k) {
+                    if (keys.at(k).contains('=')) {
+                        int pos = keys.at(k).section('=', 0, 0).toInt();
+                        pos = factor * pos + 0.5;
+                        newKeys.append(QString::number(pos) + '=' + keys.at(k).section('=', 1));
+                    } else newKeys.append(keys.at(k));
+                }
+                param.firstChild().setNodeValue(newKeys.join(";"));
+            }
+        }
+    }
+    QDomElement tractor = doc.elementsByTagName("tractor").at(0).toElement();
+    int out = tractor.attribute("out").toInt();
+    out = factor * out + 0.5;
+    tractor.setAttribute("out", out);
+    emit durationChanged(out);
+
+    //kDebug() << "///////////////////////////// " << out << " \n" << doc.toString() << "\n-------------------------";
+    return doc.toString();
+}
+
 #include "renderer.moc"