diff --git a/app/core.cpp b/app/core.cpp
index 64cea253a..1fa22e666 100644
--- a/app/core.cpp
+++ b/app/core.cpp
@@ -273,9 +273,9 @@ void Core::CreateNewProject()
 #ifdef USE_OTIO
 void Core::ExportActiveSequenceAsOTIO()
 {
-  ViewerOutput* sequence = GetSequenceToExport();
+  ProjectPtr project = GetActiveProject();
 
-  if (sequence) {
+  if (project) {
     QString fn = QFileDialog::getSaveFileName(main_window_,
                                               tr("Export as OpenTimelineIO"),
                                               QString(),
@@ -284,7 +284,7 @@ void Core::ExportActiveSequenceAsOTIO()
     if (!fn.isEmpty()) {
       fn = FileFunctions::EnsureFilenameExtension(fn, QStringLiteral("otio"));
 
-      ExportOTIOTask* task = new ExportOTIOTask(sequence, fn);
+      ExportOTIOTask* task = new ExportOTIOTask(project, fn);
       TaskDialog* dialog = new TaskDialog(task, tr("Export Sequence"), main_window_);
       dialog->open();
     }
diff --git a/app/task/project/exportotio/exportotiotask.cpp b/app/task/project/exportotio/exportotiotask.cpp
index 193f1f84b..f7cb131f2 100644
--- a/app/task/project/exportotio/exportotiotask.cpp
+++ b/app/task/project/exportotio/exportotiotask.cpp
@@ -23,6 +23,7 @@
 #include <opentimelineio/clip.h>
 #include <opentimelineio/externalReference.h>
 #include <opentimelineio/gap.h>
+#include <opentimelineio/serializableCollection.h>
 #include <opentimelineio/transition.h>
 
 #include "node/block/transition/transition.h"
@@ -30,29 +31,80 @@
 
 OLIVE_NAMESPACE_ENTER
 
-ExportOTIOTask::ExportOTIOTask(ViewerOutput *sequence, const QString &filename) :
-  sequence_(sequence),
+ExportOTIOTask::ExportOTIOTask(ProjectPtr project, const QString &filename) :
+  project_(project),
   filename_(filename)
 {
-  SetTitle(tr("Saving '%1' as OpenTimelineIO").arg(sequence_->media_name()));
+  SetTitle(tr("Exporting project to OpenTimelineIO"));
 }
 
 bool ExportOTIOTask::Run()
 {
-  auto otio_timeline = new opentimelineio::v1_0::Timeline();
+  QList<ItemPtr> sequences = project_->get_items_of_type(Item::kSequence);
 
-  opentimelineio::v1_0::ErrorStatus es;
-
-  if (!SerializeTrackList(sequence_->track_list(Timeline::kTrackTypeVideo), otio_timeline)
-      || !SerializeTrackList(sequence_->track_list(Timeline::kTrackTypeAudio), otio_timeline)) {
+  if (sequences.isEmpty()) {
+    SetError(tr("Project contains no sequences to export."));
     return false;
   }
 
-  otio_timeline->to_json_file(filename_.toStdString(), &es);
+  std::vector<opentimelineio::v1_0::SerializableObject*> serialized;
+
+  foreach (ItemPtr item, sequences) {
+    SequencePtr seq = std::static_pointer_cast<Sequence>(sequences.first());
+
+    auto otio_timeline = SerializeTimeline(seq);
+
+    if (otio_timeline) {
+      // Append to list
+      serialized.push_back(otio_timeline);
+    } else {
+      // Delete all existing timelines
+      foreach (auto s, serialized) {
+        s->possibly_delete();
+      }
+
+      // Error out of function
+      SetError(tr("Failed to serialize sequence \"%1\"").arg(seq->name()));
+
+      return false;
+    }
+  }
+
+  opentimelineio::v1_0::ErrorStatus es;
+
+  if (serialized.size() == 1) {
+    // Serialize timeline on its own
+    auto t = serialized.front();
+    t->to_json_file(filename_.toStdString(), &es);
+    t->possibly_delete();
+  } else {
+    // Serialize all into a SerializableCollection
+    auto collection = new opentimelineio::v1_0::SerializableCollection("Sequences", serialized);
+    collection->to_json_file(filename_.toStdString(), &es);
+    collection->possibly_delete();
+
+    // Delete all existing timelines
+    foreach (auto s, serialized) {
+      s->possibly_delete();
+    }
+  }
 
   return (es == opentimelineio::v1_0::ErrorStatus::OK);
 }
 
+opentimelineio::v1_0::Timeline *ExportOTIOTask::SerializeTimeline(SequencePtr sequence)
+{
+  auto otio_timeline = new opentimelineio::v1_0::Timeline(sequence->name().toStdString());
+
+  if (!SerializeTrackList(sequence->viewer_output()->track_list(Timeline::kTrackTypeVideo), otio_timeline)
+      || !SerializeTrackList(sequence->viewer_output()->track_list(Timeline::kTrackTypeAudio), otio_timeline)) {
+    otio_timeline->possibly_delete();
+    return nullptr;
+  }
+
+  return otio_timeline;
+}
+
 opentimelineio::v1_0::Track *ExportOTIOTask::SerializeTrack(TrackOutput *track)
 {
   auto otio_track = new opentimelineio::v1_0::Track();
@@ -77,7 +129,7 @@ opentimelineio::v1_0::Track *ExportOTIOTask::SerializeTrack(TrackOutput *track)
     switch (block->type()) {
     case Block::kClip:
     {
-      auto otio_clip = new opentimelineio::v1_0::Clip();
+      auto otio_clip = new opentimelineio::v1_0::Clip(block->GetLabel().toStdString());
 
       otio_clip->set_source_range(opentimelineio::v1_0::TimeRange(block->in().toRationalTime(),
                                                                   block->length().toRationalTime()));
@@ -93,17 +145,15 @@ opentimelineio::v1_0::Track *ExportOTIOTask::SerializeTrack(TrackOutput *track)
     }
     case Block::kGap:
     {
-      auto otio_gap = new opentimelineio::v1_0::Gap();
-
-      otio_gap->set_source_range(opentimelineio::v1_0::TimeRange(block->in().toRationalTime(),
-                                                                 block->length().toRationalTime()));
-
-      otio_block = otio_gap;
+      otio_block = new opentimelineio::v1_0::Gap(
+            opentimelineio::v1_0::TimeRange(block->in().toRationalTime(), block->length().toRationalTime()),
+            block->GetLabel().toStdString()
+      );
       break;
     }
     case Block::kTransition:
     {
-      auto otio_transition = new opentimelineio::v1_0::Transition();
+      auto otio_transition = new opentimelineio::v1_0::Transition(block->GetLabel().toStdString());
 
       TransitionBlock* our_transition = static_cast<TransitionBlock*>(block);
 
@@ -149,6 +199,7 @@ bool ExportOTIOTask::SerializeTrackList(TrackList *list, opentimelineio::v1_0::T
     otio_timeline->tracks()->append_child(otio_track, &es);
 
     if (es != opentimelineio::v1_0::ErrorStatus::OK) {
+      otio_track->possibly_delete();
       return false;
     }
   }
diff --git a/app/task/project/exportotio/exportotiotask.h b/app/task/project/exportotio/exportotiotask.h
index e7defe029..64f2b71c0 100644
--- a/app/task/project/exportotio/exportotiotask.h
+++ b/app/task/project/exportotio/exportotiotask.h
@@ -24,7 +24,7 @@
 #include <opentimelineio/timeline.h>
 #include <opentimelineio/track.h>
 
-#include "project/item/sequence/sequence.h"
+#include "project/project.h"
 #include "task/task.h"
 
 OLIVE_NAMESPACE_ENTER
@@ -33,17 +33,19 @@ class ExportOTIOTask : public Task
 {
   Q_OBJECT
 public:
-  ExportOTIOTask(ViewerOutput* sequence, const QString& filename);
+  ExportOTIOTask(ProjectPtr project, const QString& filename);
 
 protected:
   virtual bool Run() override;
 
 private:
+  opentimelineio::v1_0::Timeline* SerializeTimeline(SequencePtr sequence);
+
   opentimelineio::v1_0::Track* SerializeTrack(TrackOutput* track);
 
   bool SerializeTrackList(TrackList* list, opentimelineio::v1_0::Timeline *otio_timeline);
 
-  ViewerOutput* sequence_;
+  ProjectPtr project_;
 
   QString filename_;