Fix editing title file

src/bin/bin.cpp

@@ -2862,9 +2862,13 @@ void Bin::showTitleWidget(ProjectClip *clip)
     QString titlepath = m_doc->projectFolder().path() + QDir::separator() + "titles/";
     TitleWidget dia_ui(QUrl(), m_doc->timecode(), titlepath, pCore->monitorManager()->projectMonitor()->render, pCore->window());
     connect(&dia_ui, SIGNAL(requestBackgroundFrame()), pCore->monitorManager()->projectMonitor(), SLOT(slotGetCurrentImage()));
+    if (!path.isEmpty()) {
+        dia_ui.loadTitle(QUrl::fromLocalFile(path));
+    } else {
         QDomDocument doc;
         doc.setContent(clip->getProducerProperty(QStringLiteral("xmldata")));
         dia_ui.setXml(doc);
+    }
         if (dia_ui.exec() == QDialog::Accepted) {
             QMap <QString, QString> newprops;
             newprops.insert(QStringLiteral("xmldata"), dia_ui.xml().toString());

src/doc/kdenlivedoc.cpp

@@ -356,6 +356,8 @@ QDomDocument KdenliveDoc::createEmptyDocument(const QList <TrackInfo> &tracks)
     QDomElement blk = doc.createElement(QStringLiteral("producer"));
     blk.setAttribute(QStringLiteral("in"), 0);
     blk.setAttribute(QStringLiteral("out"), 500);
+    blk.setAttribute(QStringLiteral("aspect_ratio"), 1);
+    blk.setAttribute(QStringLiteral("set.test_audio"), 0);
     blk.setAttribute(QStringLiteral("id"), QStringLiteral("black"));
 
     QDomElement property = doc.createElement(QStringLiteral("property"));

src/renderer.cpp

@@ -81,6 +81,8 @@ Render::Render(Kdenlive::MonitorId rendererName, BinController *binController, G
         m_blackClip = new Mlt::Producer(*m_qmlView->profile(), "colour:black");
         m_blackClip->set("id", "black");
         m_blackClip->set("mlt_type", "producer");
+        m_blackClip->set("aspect_ratio", 1);
+        m_blackClip->set("set.test_audio", 0);
         m_mltProducer = m_blackClip->cut(0, 1);
         m_qmlView->setProducer(m_mltProducer);
         m_mltConsumer = qmlView->consumer();
@@ -2106,8 +2108,21 @@ QList <TransitionInfo> Render::mltInsertTrack(int ix, const QString &name, bool
     blockSignals(true);
     service.lock();
     Mlt::Tractor tractor(service);
+    // Find available track name
+    QStringList trackNames;
+    for (int i = 0; i < tractor.count(); i++) {
+        QScopedPointer<Mlt::Producer> track(tractor.track(i));
+        trackNames << track->get("id"); 
+    }
+    QString newName = QStringLiteral("playlist0");
+    int i = 1;
+    while (trackNames.contains(newName)) {
+        newName = QString("playlist%1").arg(i);
+        i++;
+    }
     Mlt::Playlist playlist(*service.profile());
     playlist.set("kdenlive:track_name", name.toUtf8().constData());
+    playlist.set("id", newName.toUtf8().constData());
     int ct = tractor.count();
     if (ix > ct) {
         //qDebug() << "// ERROR, TRYING TO insert TRACK " << ix << ", max: " << ct;