1 /***************************************************************************
2 * DocClipBase.cpp - description *
3 * ------------------- *
4 * begin : Fri Apr 12 2002 *
5 * Copyright (C) 2002 by Jason Wood (jasonwood@blueyonder.co.uk) *
6 * Copyright (C) 2007 by Jean-Baptiste Mardelle (jb@kdenlive.org) *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the *
20 * Free Software Foundation, Inc., *
21 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
22 ***************************************************************************/
27 #include "docclipbase.h"
28 #include "kdenlivesettings.h"
30 #include "clipmanager.h"
34 #include <QCryptographicHash>
36 DocClipBase::DocClipBase(ClipManager *clipManager, QDomElement xml, const QString &id):
37 m_id(id), m_description(QString()), m_refcount(0), m_audioThumbCreated(false), m_duration(GenTime()), m_thumbProd(NULL), m_audioTimer(NULL), m_properties(QMap <QString, QString> ()), audioFrameChache(QMap<int, QMap<int, QByteArray> > ()), m_baseTrackProducers(QList <Mlt::Producer *>()), m_snapMarkers(QList < CommentedTime > ()), m_videoOnlyProducer(NULL), m_audioOnlyProducer(NULL) {
38 int type = xml.attribute("type").toInt();
39 m_clipType = (CLIPTYPE) type;
41 QDomNamedNodeMap attributes = xml.attributes();
42 for (unsigned int i = 0; i < attributes.count(); i++) {
43 m_properties.insert(attributes.item(i).nodeName(), attributes.item(i).nodeValue());
46 KUrl url = KUrl(xml.attribute("resource"));
47 if (!m_properties.contains("file_hash") && !url.isEmpty()) getFileHash(url.path());
49 if (xml.hasAttribute("duration")) {
50 setDuration(GenTime(xml.attribute("duration").toInt(), KdenliveSettings::project_fps()));
52 int out = xml.attribute("out").toInt();
53 int in = xml.attribute("in").toInt();
54 setDuration(GenTime(out - in, KdenliveSettings::project_fps()));
57 if (!m_properties.contains("name")) m_properties.insert("name", url.fileName());
59 //if (!url.isEmpty() && QFile::exists(url.path()))
61 m_thumbProd = new KThumb(clipManager, url, m_id, m_properties.value("file_hash"));
62 if (m_clipType == AV || m_clipType == AUDIO) slotCreateAudioTimer();
64 //kDebug() << "type is video" << (m_clipType == AV) << " " << m_clipType;
67 /*DocClipBase & DocClipBase::operator=(const DocClipBase & clip) {
68 DocClipBase::operator=(clip);
70 m_clipType = clip.clipType();
72 m_duration = clip.duration();
73 m_audioThumbCreated = clip.audioThumbCreated();
74 m_properties = clip.properties();
78 DocClipBase::~DocClipBase() {
86 qDeleteAll(m_baseTrackProducers);
87 m_baseTrackProducers.clear();
90 void DocClipBase::setZone(QPoint zone) {
91 m_properties.insert("zone_in", QString::number(zone.x()));
92 m_properties.insert("zone_out", QString::number(zone.y()));
95 QPoint DocClipBase::zone() const {
97 zone.setX(m_properties.value("zone_in").toInt());
98 zone.setY(m_properties.value("zone_out", "50").toInt());
102 void DocClipBase::slotCreateAudioTimer() {
103 connect(m_thumbProd, SIGNAL(audioThumbReady(QMap <int, QMap <int, QByteArray> >)), this , SLOT(updateAudioThumbnail(QMap <int, QMap <int, QByteArray> >)));
104 connect(this, SIGNAL(getAudioThumbs()), this , SLOT(slotGetAudioThumbs()));
105 m_audioTimer = new QTimer(this);
106 connect(m_audioTimer, SIGNAL(timeout()), this, SLOT(slotGetAudioThumbs()));
109 void DocClipBase::askForAudioThumbs() {
110 if (m_thumbProd) m_thumbProd->askForAudioThumbs(getId());
113 void DocClipBase::slotClearAudioCache() {
114 if (m_thumbProd) m_thumbProd->stopAudioThumbs();
115 if (m_audioTimer != NULL) m_audioTimer->stop();
116 audioFrameChache.clear();
117 m_audioThumbCreated = false;
120 /*void DocClipBase::getClipMainThumb() {
121 if (m_thumbProd) m_thumbProd->getMainThumb(m_properties.value("thumbnail").toInt());
124 KThumb *DocClipBase::thumbProducer() {
128 bool DocClipBase::audioThumbCreated() const {
129 return m_audioThumbCreated;
132 const QString DocClipBase::name() const {
134 return m_properties.value("name");
137 const QString &DocClipBase::getId() const {
141 void DocClipBase::setId(const QString &newId) {
145 const CLIPTYPE & DocClipBase::clipType() const {
149 void DocClipBase::setClipType(CLIPTYPE type) {
152 m_properties.insert("type", QString::number((int) type));
153 if (m_thumbProd && m_audioTimer == NULL && (m_clipType == AV || m_clipType == AUDIO))
154 slotCreateAudioTimer();
157 KUrl DocClipBase::fileURL() const {
158 QString res = m_properties.value("resource");
159 if (m_clipType != COLOR && !res.isEmpty()) return KUrl(res);
163 void DocClipBase::setClipThumbFrame(const uint &ix) {
164 m_properties.insert("thumbnail", QString::number((int) ix));
167 uint DocClipBase::getClipThumbFrame() const {
168 return (uint) m_properties.value("thumbnail").toInt();
171 const QString DocClipBase::description() const {
172 return m_properties.value("description");
175 bool DocClipBase::isTransparent() const {
176 return (m_properties.value("transparency") == "1");
179 const QString DocClipBase::getProperty(const QString prop) const {
180 return m_properties.value(prop);
183 void DocClipBase::setDuration(GenTime dur) {
185 m_properties.insert("duration", QString::number((int) dur.frames(KdenliveSettings::project_fps())));
188 const GenTime &DocClipBase::duration() const {
192 const GenTime DocClipBase::maxDuration() const {
193 if (m_clipType == COLOR || m_clipType == IMAGE || m_clipType == TEXT || (m_clipType == SLIDESHOW && m_properties.value("loop") == "1")) {
194 const GenTime dur(15000, KdenliveSettings::project_fps());
200 bool DocClipBase::hasFileSize() const {
206 QDomElement DocClipBase::toXML() const {
208 QDomElement clip = doc.createElement("producer");
210 QMapIterator<QString, QString> i(m_properties);
211 while (i.hasNext()) {
213 if (!i.value().isEmpty()) clip.setAttribute(i.key(), i.value());
215 doc.appendChild(clip);
216 //kDebug()<<"/// CLIP XML: "<<doc.toString();
217 return doc.documentElement();
221 void DocClipBase::setAudioThumbCreated(bool isDone) {
222 m_audioThumbCreated = isDone;
226 void DocClipBase::setThumbnail(const QPixmap & pixmap) {
227 m_thumbnail = pixmap;
230 const QPixmap & DocClipBase::thumbnail() const {
234 void DocClipBase::updateAudioThumbnail(QMap<int, QMap<int, QByteArray> > data) {
235 //kDebug() << "CLIPBASE RECIEDVED AUDIO DATA*********************************************";
236 audioFrameChache = data;
237 m_audioThumbCreated = true;
241 QList < GenTime > DocClipBase::snapMarkers() const {
242 QList < GenTime > markers;
244 for (uint count = 0; count < m_snapMarkers.count(); ++count) {
245 markers.append(m_snapMarkers[count].time());
251 QList < CommentedTime > DocClipBase::commentedSnapMarkers() const {
252 return m_snapMarkers;
255 void DocClipBase::setSnapMarkers(QList < CommentedTime > markers) {
256 m_snapMarkers = markers;
259 void DocClipBase::addSnapMarker(const GenTime & time, QString comment) {
260 QList < CommentedTime >::Iterator it = m_snapMarkers.begin();
261 for (it = m_snapMarkers.begin(); it != m_snapMarkers.end(); ++it) {
262 if ((*it).time() >= time)
266 if ((it != m_snapMarkers.end()) && ((*it).time() == time)) {
267 (*it).setComment(comment);
268 //kError() << "trying to add Snap Marker that already exists, this will cause inconsistancies with undo/redo";
270 CommentedTime t(time, comment);
271 m_snapMarkers.insert(it, t);
276 void DocClipBase::editSnapMarker(const GenTime & time, QString comment) {
277 QList < CommentedTime >::Iterator it;
278 for (it = m_snapMarkers.begin(); it != m_snapMarkers.end(); ++it) {
279 if ((*it).time() == time)
282 if (it != m_snapMarkers.end()) {
283 (*it).setComment(comment);
285 kError() << "trying to edit Snap Marker that does not already exists";
289 QString DocClipBase::deleteSnapMarker(const GenTime & time) {
290 QString result = i18n("Marker");
291 QList < CommentedTime >::Iterator itt = m_snapMarkers.begin();
293 while (itt != m_snapMarkers.end()) {
294 if ((*itt).time() == time)
299 if ((itt != m_snapMarkers.end()) && ((*itt).time() == time)) {
300 result = (*itt).comment();
301 m_snapMarkers.erase(itt);
307 GenTime DocClipBase::hasSnapMarkers(const GenTime & time) {
308 QList < CommentedTime >::Iterator itt = m_snapMarkers.begin();
310 while (itt != m_snapMarkers.end()) {
311 if ((*itt).time() == time)
319 GenTime DocClipBase::findPreviousSnapMarker(const GenTime & currTime) {
321 for (it = 0; it < m_snapMarkers.count(); it++) {
322 if (m_snapMarkers[it].time() >= currTime)
325 if (it == 0) return GenTime();
326 else if (it == m_snapMarkers.count() - 1 && m_snapMarkers[it].time() < currTime)
327 return m_snapMarkers[it].time();
328 else return m_snapMarkers[it-1].time();
331 GenTime DocClipBase::findNextSnapMarker(const GenTime & currTime) {
333 for (it = 0; it < m_snapMarkers.count(); it++) {
334 if (m_snapMarkers[it].time() > currTime)
337 if (it < m_snapMarkers.count() && m_snapMarkers[it].time() > currTime) return m_snapMarkers[it].time();
341 QString DocClipBase::markerComment(GenTime t) {
342 QList < CommentedTime >::Iterator itt = m_snapMarkers.begin();
344 while (itt != m_snapMarkers.end()) {
345 if ((*itt).time() == t)
346 return (*itt).comment();
352 void DocClipBase::deleteProducers() {
353 qDeleteAll(m_baseTrackProducers);
354 m_baseTrackProducers.clear();
355 if (m_thumbProd) m_thumbProd->clearProducer();
358 void DocClipBase::setProducer(Mlt::Producer *producer) {
359 if (producer == NULL) return;
360 QString id = producer->get("id");
361 if (id.contains('_')) {
362 // this is a subtrack producer, insert it at correct place
363 id = id.section('_', 1, 1);
365 m_audioOnlyProducer = producer;
369 m_videoOnlyProducer = producer;
372 int pos = id.toInt();
373 if (pos >= m_baseTrackProducers.count()) {
374 while (m_baseTrackProducers.count() - 1 < pos) {
375 m_baseTrackProducers.append(NULL);
378 if (m_baseTrackProducers.at(pos) == NULL) m_baseTrackProducers[pos] = producer;
380 if (m_baseTrackProducers.isEmpty()) m_baseTrackProducers.append(producer);
381 else if (m_baseTrackProducers.at(0) == NULL) m_baseTrackProducers[0] = producer;
383 //m_clipProducer = producer;
384 //m_clipProducer->set("transparency", m_properties.value("transparency").toInt());
385 if (m_thumbProd && !m_thumbProd->hasProducer()) m_thumbProd->setProducer(producer);
388 Mlt::Producer *DocClipBase::audioProducer() {
389 if (m_audioOnlyProducer == NULL) {
391 for (i = 0; i < m_baseTrackProducers.count(); i++)
392 if (m_baseTrackProducers.at(i) != NULL) break;
393 if (i >= m_baseTrackProducers.count()) return NULL;
394 m_audioOnlyProducer = new Mlt::Producer(*m_baseTrackProducers.at(i)->profile(), m_baseTrackProducers.at(i)->get("resource"));
395 if (m_properties.contains("force_aspect_ratio")) m_audioOnlyProducer->set("force_aspect_ratio", m_properties.value("force_aspect_ratio").toDouble());
396 if (m_properties.contains("threads")) m_audioOnlyProducer->set("threads", m_properties.value("threads").toInt());
397 m_audioOnlyProducer->set("video_index", -1);
398 if (m_properties.contains("audio_index")) m_audioOnlyProducer->set("audio_index", m_properties.value("audio_index").toInt());
399 char *tmp = (char *) qstrdup(QString(getId() + "_audio").toUtf8().data());
400 m_audioOnlyProducer->set("id", tmp);
403 return m_audioOnlyProducer;
406 Mlt::Producer *DocClipBase::videoProducer() {
407 if (m_videoOnlyProducer == NULL) {
409 for (i = 0; i < m_baseTrackProducers.count(); i++)
410 if (m_baseTrackProducers.at(i) != NULL) break;
411 if (i >= m_baseTrackProducers.count()) return NULL;
412 m_videoOnlyProducer = new Mlt::Producer(*m_baseTrackProducers.at(i)->profile(), m_baseTrackProducers.at(i)->get("resource"));
413 if (m_properties.contains("force_aspect_ratio")) m_videoOnlyProducer->set("force_aspect_ratio", m_properties.value("force_aspect_ratio").toDouble());
414 if (m_properties.contains("threads")) m_videoOnlyProducer->set("threads", m_properties.value("threads").toInt());
415 m_videoOnlyProducer->set("audio_index", -1);
416 if (m_properties.contains("video_index")) m_videoOnlyProducer->set("video_index", m_properties.value("video_index").toInt());
417 char *tmp = (char *) qstrdup(QString(getId() + "_video").toUtf8().data());
418 m_videoOnlyProducer->set("id", tmp);
421 return m_videoOnlyProducer;
424 Mlt::Producer *DocClipBase::producer(int track) {
425 /*for (int i = 0; i < m_baseTrackProducers.count(); i++) {
426 if (m_baseTrackProducers.at(i)) kDebug() << "// PROD: " << i << ", ID: " << m_baseTrackProducers.at(i)->get("id");
428 if (track == -1 || (m_clipType != AUDIO && m_clipType != AV)) {
429 if (m_baseTrackProducers.count() == 0) return NULL;
430 for (int i = 0; i < m_baseTrackProducers.count(); i++) {
431 if (m_baseTrackProducers.at(i) != NULL)
432 return m_baseTrackProducers.at(i);
436 if (track >= m_baseTrackProducers.count()) {
437 while (m_baseTrackProducers.count() - 1 < track) {
438 m_baseTrackProducers.append(NULL);
441 if (m_baseTrackProducers.at(track) == NULL) {
443 for (i = 0; i < m_baseTrackProducers.count(); i++)
444 if (m_baseTrackProducers.at(i) != NULL) break;
445 if (i >= m_baseTrackProducers.count()) return NULL;
446 m_baseTrackProducers[track] = new Mlt::Producer(*m_baseTrackProducers.at(i)->profile(), m_baseTrackProducers.at(i)->get("resource"));
447 if (m_properties.contains("force_aspect_ratio")) m_baseTrackProducers[track]->set("force_aspect_ratio", m_properties.value("force_aspect_ratio").toDouble());
448 if (m_properties.contains("threads")) m_baseTrackProducers[track]->set("threads", m_properties.value("threads").toInt());
449 if (m_properties.contains("video_index")) m_baseTrackProducers[track]->set("video_index", m_properties.value("video_index").toInt());
450 if (m_properties.contains("audio_index")) m_baseTrackProducers[track]->set("audio_index", m_properties.value("audio_index").toInt());
451 char *tmp = (char *) qstrdup(QString(getId() + '_' + QString::number(track)).toUtf8().data());
452 m_baseTrackProducers[track]->set("id", tmp);
454 if (KdenliveSettings::dropbframes() && m_baseTrackProducers.at(i)->get("skip_loop_filter") && strcmp(m_baseTrackProducers.at(i)->get("skip_loop_filter"), "all") == 0) {
455 m_baseTrackProducers[track]->set("skip_loop_filter", "all");
456 m_baseTrackProducers[track]->set("skip_frame", "bidir");
459 return m_baseTrackProducers.at(track);
462 void DocClipBase::setProducerProperty(const char *name, int data) {
463 for (int i = 0; i < m_baseTrackProducers.count(); i++) {
464 if (m_baseTrackProducers.at(i) != NULL)
465 m_baseTrackProducers[i]->set(name, data);
469 void DocClipBase::setProducerProperty(const char *name, const char *data) {
470 for (int i = 0; i < m_baseTrackProducers.count(); i++) {
471 if (m_baseTrackProducers.at(i) != NULL)
472 m_baseTrackProducers[i]->set(name, data);
476 const char *DocClipBase::producerProperty(const char *name) const {
477 for (int i = 0; i < m_baseTrackProducers.count(); i++) {
478 if (m_baseTrackProducers.at(i) != NULL) {
479 return m_baseTrackProducers.at(i)->get(name);
486 void DocClipBase::slotRefreshProducer() {
487 if (m_baseTrackProducers.count() == 0) return;
488 kDebug() << "//////////// REFRESH CLIP !!!!!!!!!!!!!!!!";
489 if (m_clipType == SLIDESHOW) {
490 /*char *tmp = (char *) qstrdup(getProperty("resource").toUtf8().data());
491 Mlt::Producer producer(*(m_clipProducer->profile()), tmp);
493 delete m_clipProducer;
494 m_clipProducer = new Mlt::Producer(producer.get_producer());
495 if (!getProperty("out").isEmpty()) m_clipProducer->set_in_and_out(getProperty("in").toInt(), getProperty("out").toInt());*/
496 setProducerProperty("ttl", getProperty("ttl").toInt());
497 //m_clipProducer->set("id", getProperty("id"));
498 if (getProperty("fade") == "1") {
499 // we want a fade filter effect
500 kDebug() << "//////////// FADE WANTED";
501 Mlt::Service clipService(m_baseTrackProducers.at(0)->get_service());
503 Mlt::Filter *filter = clipService.filter(ct);
505 if (filter->get("mlt_service") == "luma") {
509 filter = clipService.filter(ct);
512 if (filter && filter->get("mlt_service") == "luma") {
513 filter->set("period", getProperty("ttl").toInt() - 1);
514 filter->set("luma.out", getProperty("luma_duration").toInt());
515 QString resource = getProperty("luma_file");
516 char *tmp = (char *) qstrdup(resource.toUtf8().data());
517 filter->set("luma.resource", tmp);
519 if (!getProperty("softness").isEmpty()) {
520 int soft = getProperty("softness").toInt();
521 filter->set("luma.softness", (double) soft / 100.0);
524 // filter does not exist, create it...
525 Mlt::Filter *filter = new Mlt::Filter(*(m_baseTrackProducers.at(0)->profile()), "luma");
526 filter->set("period", getProperty("ttl").toInt() - 1);
527 filter->set("luma.out", getProperty("luma_duration").toInt());
528 QString resource = getProperty("luma_file");
529 char *tmp = (char *) qstrdup(resource.toUtf8().data());
530 filter->set("luma.resource", tmp);
532 if (!getProperty("softness").isEmpty()) {
533 int soft = getProperty("softness").toInt();
534 filter->set("luma.softness", (double) soft / 100.0);
536 clipService.attach(*filter);
539 kDebug() << "//////////// FADE NOT WANTED!!!";
540 Mlt::Service clipService(m_baseTrackProducers.at(0)->get_service());
542 Mlt::Filter *filter = clipService.filter(0);
544 if (filter->get("mlt_service") == "luma") {
545 clipService.detach(*filter);
547 filter = clipService.filter(ct);
553 void DocClipBase::setProperties(QMap <QString, QString> properties) {
554 // changing clip type is not allowed
555 properties.remove("type");
556 QMapIterator<QString, QString> i(properties);
557 bool refreshProducer = false;
559 keys << "luma_duration" << "luma_file" << "fade" << "ttl" << "softness";
560 while (i.hasNext()) {
562 setProperty(i.key(), i.value());
563 if (m_clipType == SLIDESHOW && keys.contains(i.key())) refreshProducer = true;
565 if (refreshProducer) slotRefreshProducer();
568 void DocClipBase::setMetadata(QMap <QString, QString> properties) {
569 m_metadata = properties;
572 QMap <QString, QString> DocClipBase::metadata() const {
576 void DocClipBase::clearProperty(const QString &key) {
577 m_properties.remove(key);
580 void DocClipBase::getFileHash(const QString &url) {
581 if (m_clipType == SLIDESHOW) return;
583 if (file.open(QIODevice::ReadOnly)) { // write size and hash only if resource points to a file
586 //kDebug() << "SETTING HASH of" << value;
587 m_properties.insert("file_size", QString::number(file.size()));
589 * 1 MB = 1 second per 450 files (or faster)
590 * 10 MB = 9 seconds per 450 files (or faster)
592 if (file.size() > 1000000*2) {
593 fileData = file.read(1000000);
594 if (file.seek(file.size() - 1000000))
595 fileData.append(file.readAll());
597 fileData = file.readAll();
599 fileHash = QCryptographicHash::hash(fileData, QCryptographicHash::Md5);
600 m_properties.insert("file_hash", QString(fileHash.toHex()));
601 //kDebug() << file.fileName() << file.size() << fileHash.toHex();
605 QString DocClipBase::getClipHash() const {
607 if (m_clipType == SLIDESHOW) hash = QCryptographicHash::hash(m_properties.value("resource").toAscii().data(), QCryptographicHash::Md5).toHex();
608 else if (m_clipType == COLOR) hash = QCryptographicHash::hash(m_properties.value("colour").toAscii().data(), QCryptographicHash::Md5).toHex();
609 else hash = m_properties.value("file_hash");
613 void DocClipBase::refreshThumbUrl() {
614 if (m_thumbProd) m_thumbProd->updateThumbUrl(m_properties.value("file_hash"));
617 void DocClipBase::setProperty(const QString &key, const QString &value) {
618 m_properties.insert(key, value);
619 if (key == "resource") {
621 if (m_thumbProd) m_thumbProd->updateClipUrl(KUrl(value), m_properties.value("file_hash"));
622 } else if (key == "out") setDuration(GenTime(value.toInt(), KdenliveSettings::project_fps()));
623 //else if (key == "transparency") m_clipProducer->set("transparency", value.toInt());
624 else if (key == "colour") {
625 char *tmp = (char *) qstrdup(value.toUtf8().data());
626 setProducerProperty("colour", tmp);
628 } else if (key == "xmldata") {
629 setProducerProperty("force_reload", 1);
630 } else if (key == "force_aspect_ratio") {
631 if (value.isEmpty()) {
632 m_properties.remove("force_aspect_ratio");
633 setProducerProperty("force_aspect_ratio", 0);
634 } else setProducerProperty("force_aspect_ratio", value.toDouble());
635 } else if (key == "threads") {
636 if (value.isEmpty()) {
637 m_properties.remove("threads");
638 setProducerProperty("threads", 1);
639 } else setProducerProperty("threads", value.toInt());
640 } else if (key == "video_index") {
641 if (value.isEmpty()) {
642 m_properties.remove("video_index");
643 setProducerProperty("video_index", m_properties.value("default_video").toInt());
644 } else setProducerProperty("video_index", value.toInt());
645 } else if (key == "audio_index") {
646 if (value.isEmpty()) {
647 m_properties.remove("audio_index");
648 setProducerProperty("audio_index", m_properties.value("default_audio").toInt());
649 } else setProducerProperty("audio_index", value.toInt());
653 QMap <QString, QString> DocClipBase::properties() const {
657 bool DocClipBase::slotGetAudioThumbs() {
658 if (m_thumbProd == NULL) return false;
659 if (!KdenliveSettings::audiothumbnails()) {
660 if (m_audioTimer != NULL) m_audioTimer->stop();
663 if (m_audioThumbCreated) {
664 if (m_audioTimer != NULL) m_audioTimer->stop();
667 if (m_audioTimer != NULL)
668 m_audioTimer->start(1500);
669 double lengthInFrames = duration().frames(KdenliveSettings::project_fps());
670 m_thumbProd->getAudioThumbs(2, 0, lengthInFrames /*must be number of frames*/, 20);