By Thibault Saunier. (c) Academy Software Foundation OpenTimelineIO BoF (SIGGRAPH 2019) 28 July - 1 August 2019 Los Angeles https://www.youtube.com/watch?v=aGfR0pu3k6E&feature=youtu.be&t=1554

1. OpenTimelineIO
and
GStreamer integration
Thibault Saunier

2. GStreamer
Cross platform open source pipeline based
multimedia framework
By default on all Linux distributions
Used in many industries

3. GStreamer Editing
Services
High level APIs for video editing
GESTimeline
GESProject
GESLayer
GESTrack

4. OpenTimeline IO integration
Added an xges OpenTimelineIO adapter
→ We can convert editorial cut information from
and to the GES serialization format

5. Support in GES
GESOtioFormatter
→ Any format supported by OpenTimelineIO can
be loaded in GES
→ GES timelines can be serialized in any format
supported by otio

6. Support in GES
Playback example
Rendering example
Convertion example
ges-launch-1.0 -l foo.otio
ges-launch-1.0 -l foo.otio -o rendered_foo.mkv
--format video/x-matroska:video/x-av1:audio/x-opus
# foo.xml is a Final Cut Pro XML file
ges-launch-1.0 -l foo.xml --save foo.otio

7. Support in GStreamer
Wrote the gesdemux GStreamer element
Implemented typefind function to detect le
formats supported by Otio
→ Files supported by OpenTimelineIO can be used
as any media les in GStreamer
gst-launch-1.0 playbin uri=file:///foo.otio

8. Support in Pitivi

9. Future
Move to the Otio C++ API
Add support for nested timelines in the Otio
adapter

10. Thanks!