Fix incorrect stream or no audio on insert.

Fixes #786

src/timeline2/model/timelinemodel.cpp

@@ -1148,11 +1148,16 @@ bool TimelineModel::requestClipInsertion(const QString &binClipId, int trackId,
                 }
             }
         } else if (audioDrop) {
-            // Using our targets
+            // Drag & drop, use our first audio target
             audioStream = m_audioTarget.first();
+        } else {
+            // Using target tracks
+            if (m_audioTarget.contains(trackId)) {
+                audioStream = m_audioTarget.value(trackId);
+            }
         }
 
-        res = requestClipCreation(binIdWithInOut, id, getTrackById_const(trackId)->trackType(), audioDrop ? audioStream : -1, 1.0, false, local_undo, local_redo);
+        res = requestClipCreation(binIdWithInOut, id, getTrackById_const(trackId)->trackType(), audioStream, 1.0, false, local_undo, local_redo);
         res = res && requestClipMove(id, trackId, position, true, refreshView, logUndo, logUndo, local_undo, local_redo);
         QList <int> target_track;
         if (audioDrop) {

src/timeline2/view/timelinecontroller.cpp

@@ -2213,7 +2213,13 @@ int TimelineController::insertZone(const QString &binId, QPoint zone, bool overw
     int aTrack = -1;
     int vTrack = -1;
     if (clip->hasAudio() && !m_model->m_audioTarget.isEmpty()) {
-        aTrack = m_model->m_audioTarget.firstKey();
+        QList<int> audioTracks = m_model->m_audioTarget.keys();
+        for (int tid : audioTracks) {
+            if (m_model->getTrackById_const(tid)->shouldReceiveTimelineOp()) {
+                aTrack = tid;
+                break;
+            }
+        }
     }
     if (clip->hasVideo()) {
         vTrack = videoTarget();