timeline: implement nest function

Also includes some improved cache/request code

app/core.cpp

@@ -1490,7 +1490,7 @@ bool Core::LabelNodes(const QVector<Node *> &nodes, MultiUndoCommand *parent)
   return false;
 }
 
-Sequence *Core::CreateNewSequenceForProject(Project* project) const
+Sequence *Core::CreateNewSequenceForProject(const QString &format, Project* project)
 {
   Sequence* new_sequence = new Sequence();
 
@@ -1498,7 +1498,7 @@ Sequence *Core::CreateNewSequenceForProject(Project* project) const
   int sequence_number = 1;
   QString sequence_name;
   do {
-    sequence_name = tr("Sequence %1").arg(sequence_number);
+    sequence_name = format.arg(sequence_number);
     sequence_number++;
   } while (project->root()->ChildExistsWithName(sequence_name));
   new_sequence->SetLabel(sequence_name);

app/core.h

@@ -255,7 +255,11 @@ public:
   /**
    * @brief Create a new sequence named appropriately for the active project
    */
-  Sequence* CreateNewSequenceForProject(Project *project) const;
+  static Sequence* CreateNewSequenceForProject(const QString &format, Project *project);
+  static Sequence* CreateNewSequenceForProject(Project *project)
+  {
+    return CreateNewSequenceForProject(tr("Sequence %1"), project);
+  }
 
   /**
    * @brief Opens a project from the recently opened list

app/node/block/clip/clip.cpp

@@ -232,7 +232,7 @@ void ClipBlock::RequestRangeFromConnected(const TimeRange &range)
         {
           TimeRange thumb_range = range.Intersected(max_range);
           if (GetAdjustedThumbnailRange(&thumb_range)) {
-            emit connected->thumbnail_cache()->Request(thumb_range);
+            connected->thumbnail_cache()->Request(thumb_range);
           }
         }
 
@@ -296,7 +296,7 @@ void ClipBlock::RequestRangeForCache(PlaybackCache *cache, const TimeRange &max_
   }
 
   if (request) {
-    emit cache->Request(r);
+    cache->Request(r);
   }
 }
 

app/node/output/track/track.cpp

@@ -404,6 +404,33 @@ QVector<Block *> Track::BlocksAtTimeRange(const TimeRange &range) const
   return list;
 }
 
+bool Track::IsRangeFree(const TimeRange &range) const
+{
+  Block *b = NearestBlockBeforeOrAt(range.in());
+  if (!b) {
+    // No block here, assume track is empty here
+    return true;
+  }
+
+  if (!dynamic_cast<GapBlock*>(b)) {
+    // There's a block at or around the start point that isn't a gap, range is not free
+    return false;
+  }
+
+  while ((b = b->next())) {
+    if (b->in() >= range.out()) {
+      // This block is after the range, no longer relevant
+      break;
+    } else if (!dynamic_cast<GapBlock*>(b)) {
+      // Found a block in this range, range is not free
+      return false;
+    }
+  }
+
+  // If we get here, we couldn't find anything in the way of this range
+  return true;
+}
+
 void Track::InvalidateCache(const TimeRange& range, const QString& from, int element, InvalidateCacheOptions options)
 {
   TimeRange limited;

app/node/output/track/track.h

@@ -338,6 +338,11 @@ public:
    */
   QVector<Block*> BlocksAtTimeRange(const TimeRange& range) const;
 
+  /*
+   * @brief Returns whether a time range is empty or only has a gap
+   */
+  bool IsRangeFree(const TimeRange &range) const;
+
   const QVector<Block *> &Blocks() const
   {
     return blocks_;

app/node/output/viewer/viewer.cpp

@@ -224,16 +224,16 @@ void ViewerOutput::InvalidateCache(const TimeRange& range, const QString& from,
 
   if (Node *connected = GetConnectedOutput(from, element)) {
     if (from == kTextureInput) {
-      //emit connected->thumbnail_cache()->Request(range.Intersected(max_range), PlaybackCache::kPreviewsOnly);
+      //connected->thumbnail_cache()->Request(range.Intersected(max_range), PlaybackCache::kPreviewsOnly);
       if (autocache_input_video_) {
         TimeRange max_range = InputTimeAdjustment(from, element, TimeRange(0, GetVideoLength()));
-        emit connected->video_frame_cache()->Request(range.Intersected(max_range));
+        connected->video_frame_cache()->Request(range.Intersected(max_range));
       }
     } else if (from == kSamplesInput) {
       TimeRange max_range = InputTimeAdjustment(from, element, TimeRange(0, GetAudioLength()));
-      emit connected->waveform_cache()->Request(range.Intersected(max_range));
+      connected->waveform_cache()->Request(range.Intersected(max_range));
       if (autocache_input_audio_) {
-        emit connected->audio_playback_cache()->Request(range.Intersected(max_range));
+        connected->audio_playback_cache()->Request(range.Intersected(max_range));
       }
     }
   }
@@ -393,7 +393,7 @@ void ViewerOutput::ConnectedToPreviewEvent()
     TimeRange max_range = InputTimeAdjustment(kSamplesInput, -1, TimeRange(0, GetAudioLength()));
     TimeRangeList invalid = connected->waveform_cache()->GetInvalidatedRanges(max_range);
     for (const TimeRange &r : invalid) {
-      emit connected->waveform_cache()->Request(r);
+      connected->waveform_cache()->Request(r);
     }
   }
 }

app/panel/timeline/timeline.h

@@ -98,6 +98,11 @@ public:
     timeline_widget()->ShowSpeedDurationDialogForSelectedClips();
   }
 
+  void NestSelectedClips()
+  {
+    timeline_widget()->NestSelectedClips();
+  }
+
   void InsertFootageAtPlayhead(const QVector<ViewerOutput *> &footage);
 
   void OverwriteFootageAtPlayhead(const QVector<ViewerOutput *> &footage);

app/render/playbackcache.cpp

@@ -223,6 +223,13 @@ void PlaybackCache::InvalidateAll()
   Invalidate(TimeRange(0, RATIONAL_MAX));
 }
 
+void PlaybackCache::Request(const TimeRange &r)
+{
+  requested_.insert(r);
+
+  emit Requested(r);
+}
+
 void PlaybackCache::Validate(const TimeRange &r, bool signal)
 {
   validated_.insert(r);

app/render/playbackcache.h

@@ -98,15 +98,29 @@ public:
 
   const QVector<Passthrough> &GetPassthroughs() const { return passthroughs_; }
 
+  void ClearRequestRange(const olive::TimeRange &r)
+  {
+    requested_.remove(r);
+  }
+
+  void ResignalRequests()
+  {
+    for (const TimeRange &r : requested_) {
+      emit Requested(r);
+    }
+  }
+
 public slots:
   void InvalidateAll();
 
+  void Request(const olive::TimeRange &r);
+
 signals:
   void Invalidated(const olive::TimeRange& r);
 
   void Validated(const olive::TimeRange& r);
 
-  void Request(const olive::TimeRange& r);
+  void Requested(const olive::TimeRange& r);
 
   void CancelAll();
 
@@ -124,6 +138,8 @@ protected:
 private:
   TimeRangeList validated_;
 
+  TimeRangeList requested_;
+
   QUuid uuid_;
 
   bool saving_enabled_;

app/render/previewautocacher.cpp

@@ -100,6 +100,8 @@ void PreviewAutoCacher::VideoInvalidatedFromCache(const TimeRange &range)
 {
   PlaybackCache *cache = static_cast<PlaybackCache*>(sender());
 
+  cache->ClearRequestRange(range);
+
   VideoInvalidatedFromNode(cache, range);
 }
 
@@ -107,6 +109,8 @@ void PreviewAutoCacher::AudioInvalidatedFromCache(const TimeRange &range)
 {
   PlaybackCache *cache = static_cast<PlaybackCache*>(sender());
 
+  cache->ClearRequestRange(range);
+
   AudioInvalidatedFromNode(cache, range);
 }
 
@@ -240,7 +244,10 @@ void PreviewAutoCacher::VideoRendered()
 void PreviewAutoCacher::ProcessUpdateQueue()
 {
   // Iterate everything that happened to the graph and do the same thing on our end
-  foreach (const QueuedJob& job, graph_update_queue_) {
+  while (!graph_update_queue_.empty()) {
+    QueuedJob job = graph_update_queue_.front();
+    graph_update_queue_.pop_front();
+
     switch (job.type) {
     case QueuedJob::kNodeAdded:
       AddNode(job.node);
@@ -262,7 +269,6 @@ void PreviewAutoCacher::ProcessUpdateQueue()
       break;
     }
   }
-  graph_update_queue_.clear();
 
   // Indicate that we have synchronized to this point, which is compared with the graph change
   // time to see if our copied graph is up to date
@@ -368,22 +374,22 @@ void PreviewAutoCacher::InsertIntoCopyMap(Node *node, Node *copy)
 void PreviewAutoCacher::ConnectToNodeCache(Node *node)
 {
   connect(node->video_frame_cache(),
-          &PlaybackCache::Request,
+          &PlaybackCache::Requested,
           this,
           &PreviewAutoCacher::VideoInvalidatedFromCache);
 
   connect(node->thumbnail_cache(),
-          &PlaybackCache::Request,
+          &PlaybackCache::Requested,
           this,
           &PreviewAutoCacher::VideoInvalidatedFromCache);
 
   connect(node->audio_playback_cache(),
-          &PlaybackCache::Request,
+          &PlaybackCache::Requested,
           this,
           &PreviewAutoCacher::AudioInvalidatedFromCache);
 
   connect(node->waveform_cache(),
-          &PlaybackCache::Request,
+          &PlaybackCache::Requested,
           this,
           &PreviewAutoCacher::AudioInvalidatedFromCache);
 
@@ -396,27 +402,32 @@ void PreviewAutoCacher::ConnectToNodeCache(Node *node)
           &PlaybackCache::CancelAll,
           this,
           &PreviewAutoCacher::CancelForCache);
+
+  node->video_frame_cache()->ResignalRequests();
+  node->thumbnail_cache()->ResignalRequests();
+  node->audio_playback_cache()->ResignalRequests();
+  node->waveform_cache()->ResignalRequests();
 }
 
 void PreviewAutoCacher::DisconnectFromNodeCache(Node *node)
 {
   disconnect(node->video_frame_cache(),
-             &PlaybackCache::Request,
+             &PlaybackCache::Requested,
              this,
              &PreviewAutoCacher::VideoInvalidatedFromCache);
 
   disconnect(node->thumbnail_cache(),
-             &PlaybackCache::Request,
+             &PlaybackCache::Requested,
              this,
              &PreviewAutoCacher::VideoInvalidatedFromCache);
 
   disconnect(node->audio_playback_cache(),
-             &PlaybackCache::Request,
+             &PlaybackCache::Requested,
              this,
              &PreviewAutoCacher::AudioInvalidatedFromCache);
 
   disconnect(node->waveform_cache(),
-             &PlaybackCache::Request,
+             &PlaybackCache::Requested,
              this,
              &PreviewAutoCacher::AudioInvalidatedFromCache);
 
@@ -466,6 +477,8 @@ void PreviewAutoCacher::StartCachingVideoRange(PlaybackCache *cache, const TimeR
     using_tb = viewer_node_->GetVideoParams().frame_rate_as_time_base();
   }
 
+  cache->ClearRequestRange(range);
+
   TimeRangeListFrameIterator iterator({range}, using_tb);
   pending_video_jobs_.push_back({node, cache, range, iterator});
   video_cache_data_[cache].job_tracker.insert(TimeRange(iterator.Snap(range.in()), range.out()), graph_changed_time_);
@@ -475,6 +488,9 @@ void PreviewAutoCacher::StartCachingVideoRange(PlaybackCache *cache, const TimeR
 void PreviewAutoCacher::StartCachingAudioRange(PlaybackCache *cache, const TimeRange &range)
 {
   Node *node = cache->parent();
+
+  cache->ClearRequestRange(range);
+
   pending_audio_jobs_.push_back({node, cache, range});
   audio_cache_data_[cache].job_tracker.insert(range, graph_changed_time_);
   TryRender();
@@ -486,6 +502,8 @@ void PreviewAutoCacher::VideoInvalidatedFromNode(PlaybackCache *cache, const Tim
   // want to dedicate all our rendering power to realtime feedback for the user
   //CancelVideoTasks(node);
 
+  cache->ClearRequestRange(range);
+
   // If auto-cache is enabled and a slider is not being dragged, queue up to hash these frames
   if (!NodeInputDragger::IsInputBeingDragged()) {
     StartCachingVideoRange(cache, range);
@@ -498,6 +516,8 @@ void PreviewAutoCacher::AudioInvalidatedFromNode(PlaybackCache *cache, const Tim
   // cancelled, so some areas may end up unrendered forever
   //  ClearAudioQueue();
 
+  cache->ClearRequestRange(range);
+
   // If we're auto-caching audio or require realtime waveforms, we'll have to render this
   StartCachingAudioRange(cache, range);
 }
@@ -553,37 +573,37 @@ void PreviewAutoCacher::SetRendersPaused(bool e)
 
 void PreviewAutoCacher::NodeAdded(Node *node)
 {
-  graph_update_queue_.append({QueuedJob::kNodeAdded, node, NodeInput(), nullptr});
+  graph_update_queue_.push_back({QueuedJob::kNodeAdded, node, NodeInput(), nullptr});
   UpdateGraphChangeValue();
 }
 
 void PreviewAutoCacher::NodeRemoved(Node *node)
 {
-  graph_update_queue_.append({QueuedJob::kNodeRemoved, node, NodeInput(), nullptr});
+  graph_update_queue_.push_back({QueuedJob::kNodeRemoved, node, NodeInput(), nullptr});
   UpdateGraphChangeValue();
 }
 
 void PreviewAutoCacher::EdgeAdded(Node *output, const NodeInput &input)
 {
-  graph_update_queue_.append({QueuedJob::kEdgeAdded, nullptr, input, output});
+  graph_update_queue_.push_back({QueuedJob::kEdgeAdded, nullptr, input, output});
   UpdateGraphChangeValue();
 }
 
 void PreviewAutoCacher::EdgeRemoved(Node *output, const NodeInput &input)
 {
-  graph_update_queue_.append({QueuedJob::kEdgeRemoved, nullptr, input, output});
+  graph_update_queue_.push_back({QueuedJob::kEdgeRemoved, nullptr, input, output});
   UpdateGraphChangeValue();
 }
 
 void PreviewAutoCacher::ValueChanged(const NodeInput &input)
 {
-  graph_update_queue_.append({QueuedJob::kValueChanged, nullptr, input, nullptr});
+  graph_update_queue_.push_back({QueuedJob::kValueChanged, nullptr, input, nullptr});
   UpdateGraphChangeValue();
 }
 
 void PreviewAutoCacher::ValueHintChanged(const NodeInput &input)
 {
-  graph_update_queue_.append({QueuedJob::kValueHintChanged, nullptr, input, nullptr});
+  graph_update_queue_.push_back({QueuedJob::kValueHintChanged, nullptr, input, nullptr});
   UpdateGraphChangeValue();
 }
 
@@ -591,7 +611,7 @@ void PreviewAutoCacher::TryRender()
 {
   delayed_requeue_timer_.stop();
 
-  if (!graph_update_queue_.isEmpty()) {
+  if (!graph_update_queue_.empty()) {
     // Check if we have jobs running in other threads that shouldn't be interrupted right now
     // NOTE: We don't check for downloads because, while they run in another thread, they don't
     //       require any access to the graph and therefore don't risk race conditions.

app/render/previewautocacher.h

@@ -160,7 +160,7 @@ private:
 
   Project copied_project_;
 
-  QVector<QueuedJob> graph_update_queue_;
+  std::list<QueuedJob> graph_update_queue_;
   QHash<Node*, Node*> copy_map_;
   QHash<NodeGraph*, NodeGraph*> graph_map_;
   ViewerOutput* copied_viewer_node_;

app/widget/menu/menushared.cpp

@@ -293,7 +293,7 @@ void MenuShared::EnableDisableTriggered()
 
 void MenuShared::NestTriggered()
 {
-  qDebug() << "FIXME: Stub";
+  PanelManager::instance()->MostRecentlyFocused<TimelinePanel>()->NestSelectedClips();
 }
 
 void MenuShared::DefaultTransitionTriggered()

app/widget/timelinewidget/timelinewidget.cpp

@@ -539,12 +539,16 @@ void TimelineWidget::DecreaseTrackHeight()
 
 void TimelineWidget::InsertFootageAtPlayhead(const QVector<ViewerOutput*>& footage)
 {
-  import_tool_->PlaceAt(footage, GetTime(), true);
+  auto command = new MultiUndoCommand();
+  import_tool_->PlaceAt(footage, GetTime(), true, command);
+  Core::instance()->undo_stack()->push(command);
 }
 
 void TimelineWidget::OverwriteFootageAtPlayhead(const QVector<ViewerOutput *> &footage)
 {
-  import_tool_->PlaceAt(footage, GetTime(), false);
+  auto command = new MultiUndoCommand();
+  import_tool_->PlaceAt(footage, GetTime(), false, command);
+  Core::instance()->undo_stack()->push(command);
 }
 
 void TimelineWidget::ToggleLinksOnSelected()
@@ -788,13 +792,14 @@ void TimelineWidget::RecordingCallback(const QString &filename, const TimeRange
   task.Start();
 
   MultiUndoCommand *import_command = task.GetCommand();
-  Core::instance()->undo_stack()->pushIfHasChildren(import_command);
 
   if (task.GetImportedFootage().empty()) {
     qCritical() << "Failed to import recorded audio file" << filename;
   } else {
-    import_tool_->PlaceAt({task.GetImportedFootage().front()}, time.in(), false, track.index());
+    import_tool_->PlaceAt({task.GetImportedFootage().front()}, time.in(), false, import_command, track.index());
   }
+
+  Core::instance()->undo_stack()->pushIfHasChildren(import_command);
 }
 
 void TimelineWidget::EnableRecordingOverlay(const TimelineCoordinate &coord)
@@ -839,6 +844,95 @@ void TimelineWidget::AddTentativeSubtitleTrack()
   }
 }
 
+void TimelineWidget::NestSelectedClips()
+{
+  if (!GetConnectedNode()) {
+    return;
+  }
+
+  QVector<Block*> blocks = this->selected_blocks_;
+  if (blocks.empty()) {
+    return;
+  }
+
+  QVector<Track::Reference> tracks(blocks.size());
+  QVector<TimeRange> times(blocks.size());
+  QVector<int> track_offset(Track::kCount, INT_MAX);
+  rational start_time = RATIONAL_MAX;
+  rational end_time = RATIONAL_MIN;
+  for (int i=0; i<blocks.size(); i++) {
+    Block *b = blocks.at(i);
+
+    Track::Reference tf = b->track()->ToReference();;
+    tracks[i] = tf;
+    times[i] = b->range();
+
+    int &to = track_offset[tf.type()];
+    to = std::min(to, tf.index());
+
+    start_time = std::min(start_time, b->in());
+    end_time = std::max(end_time, b->out());
+  }
+
+  auto move_to_nest_command = new MultiUndoCommand();
+
+  // Remove blocks from this sequence
+  ReplaceBlocksWithGaps(blocks, false, move_to_nest_command);
+
+  // Create new sequence
+  Project *project = this->GetConnectedNode()->project();
+  Sequence *nest = Core::CreateNewSequenceForProject(tr("Nested Sequence %1"), project);
+  nest->SetVideoParams(GetConnectedNode()->GetVideoParams());
+  nest->SetAudioParams(GetConnectedNode()->GetAudioParams());
+  move_to_nest_command->add_child(new NodeAddCommand(project, nest));
+
+  // Add to same folder
+  move_to_nest_command->add_child(new FolderAddChild(this->GetConnectedNode()->folder(), nest));
+
+  // Place blocks in new sequence
+  for (int i=0; i<blocks.size(); i++) {
+    Block *b = blocks.at(i);
+
+    const TimeRange &range = times.at(i);
+    Track::Reference track = tracks.at(i);
+
+    move_to_nest_command->add_child(new TrackPlaceBlockCommand(nest->track_list(track.type()),
+                                                  track.index() - track_offset.at(track.type()),
+                                                  b, range.in() - start_time));
+  }
+
+  // Do this command now, because we later do checks and actions that rely on these having been done
+  move_to_nest_command->redo_now();
+
+  auto meta_command = new MultiUndoCommand();
+  meta_command->add_child(move_to_nest_command);
+
+  // Find first free track index
+  bool empty = false;
+  int index = -1;
+  while (!empty) {
+    index++;
+    empty = true;
+    for (int i=0; i<Track::kCount; i++) {
+      if (track_offset.at(i) == INT_MAX) {
+        // No clips on this track
+        continue;
+      }
+
+      TrackList *list = sequence()->track_list(static_cast<Track::Type>(i));
+      if (index < list->GetTrackCount() && !list->GetTrackAt(index)->IsRangeFree(TimeRange(start_time, end_time))) {
+        empty = false;
+        break;
+      }
+    }
+  }
+
+  // Place new sequence in this sequence
+  import_tool_->PlaceAt({nest}, start_time, false, meta_command, index);
+
+  Core::instance()->undo_stack()->push(meta_command);
+}
+
 void TimelineWidget::ClearTentativeSubtitleTrack()
 {
   if (subtitle_show_command_) {

app/widget/timelinewidget/timelinewidget.h

@@ -112,6 +112,8 @@ public:
 
   void AddTentativeSubtitleTrack();
 
+  void NestSelectedClips();
+
   /**
    * @brief Timelines should always be connected to sequences
    */

app/widget/timelinewidget/tool/import.cpp

@@ -183,7 +183,9 @@ void ImportTool::DragLeave(QDragLeaveEvent* event)
 void ImportTool::DragDrop(TimelineViewMouseEvent *event)
 {
   if (!dragged_footage_.isEmpty()) {
-    DropGhosts(event->GetModifiers() & Qt::ControlModifier);
+    auto command = new MultiUndoCommand();
+    DropGhosts(event->GetModifiers() & Qt::ControlModifier, command);
+    Core::instance()->undo_stack()->pushIfHasChildren(command);
 
     event->accept();
   } else {
@@ -191,7 +193,7 @@ void ImportTool::DragDrop(TimelineViewMouseEvent *event)
   }
 }
 
-void ImportTool::PlaceAt(const QVector<ViewerOutput *> &footage, const rational &start, bool insert, int track_offset)
+void ImportTool::PlaceAt(const QVector<ViewerOutput *> &footage, const rational &start, bool insert, MultiUndoCommand *command, int track_offset)
 {
   DraggedFootageData refs;
 
@@ -199,10 +201,10 @@ void ImportTool::PlaceAt(const QVector<ViewerOutput *> &footage, const rational
     refs.append({f, f->GetEnabledStreamsAsReferences()});
   }
 
-  PlaceAt(refs, start, insert, track_offset);
+  PlaceAt(refs, start, insert, command, track_offset);
 }
 
-void ImportTool::PlaceAt(const DraggedFootageData &footage, const rational &start, bool insert, int track_offset)
+void ImportTool::PlaceAt(const DraggedFootageData &footage, const rational &start, bool insert, MultiUndoCommand *command, int track_offset)
 {
   dragged_footage_ = footage;
 
@@ -211,7 +213,7 @@ void ImportTool::PlaceAt(const DraggedFootageData &footage, const rational &star
   }
 
   PrepGhosts(start, track_offset);
-  DropGhosts(insert);
+  DropGhosts(insert, command);
 }
 
 void ImportTool::FootageToGhosts(rational ghost_start, const DraggedFootageData &sorted, const rational& dest_tb, const int& track_start)
@@ -292,9 +294,9 @@ void ImportTool::PrepGhosts(const rational& frame, const int& track_index)
   }
 }
 
-void ImportTool::DropGhosts(bool insert)
+void ImportTool::DropGhosts(bool insert, MultiUndoCommand *parent_command)
 {
-  MultiUndoCommand* command = new MultiUndoCommand();
+  auto command = new MultiUndoCommand();
 
   if (MultiUndoCommand *c = parent()->TakeSubtitleSectionCommand()) {
     command->add_child(c);
@@ -500,7 +502,10 @@ void ImportTool::DropGhosts(bool insert)
     command->add_child(new OpenSequenceCommand(sequence));
   }
 
-  Core::instance()->undo_stack()->pushIfHasChildren(command);
+  // Do command now because RequestInvalidatedFromConnected relies on track type, which will be
+  // "none" before this command is done because it won't be connected to any track
+  command->redo_now();
+  parent_command->add_child(command);
 
   while (!imported_clips.empty()) {
     imported_clips.front()->RequestInvalidatedFromConnected();

app/widget/timelinewidget/tool/import.h

@@ -37,8 +37,8 @@ public:
 
   using DraggedFootageData = QVector<QPair<ViewerOutput*, QVector<Track::Reference> > >;
 
-  void PlaceAt(const QVector<ViewerOutput *> &footage, const rational& start, bool insert, int track_offset = 0);
-  void PlaceAt(const DraggedFootageData &footage, const rational& start, bool insert, int track_offset = 0);
+  void PlaceAt(const QVector<ViewerOutput *> &footage, const rational& start, bool insert, MultiUndoCommand *command, int track_offset = 0);
+  void PlaceAt(const DraggedFootageData &footage, const rational& start, bool insert, MultiUndoCommand *command, int track_offset = 0);
 
   enum DropWithoutSequenceBehavior {
     kDWSAsk,
@@ -52,7 +52,7 @@ private:
 
   void PrepGhosts(const rational &frame, const int &track_index);
 
-  void DropGhosts(bool insert);
+  void DropGhosts(bool insert, MultiUndoCommand *parent_command);
 
   TimelineViewGhostItem* CreateGhost(const TimeRange &range, const rational &media_in, const Track::Reference &track);