[Bug 796519] Add AV1 codec parser

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796519

--- Comment #15 from Georg Ottinger <g.ottinger at gmx.at> ---
> Or do you think it is possible to have the container formats to send only
> OBUs to the decoder instead of the whole frame (similar to H264 and HEVC)?


About the Container format for example in when storing AV1 in IVF - each
temporal unit is put into a IVF Frame.

Providing a one-stop vp9-like interface would have the following issues:

1.) In order to decode the whole frame, there might be still a dependency on
the previous Seqeunce Header OBU.

2.) The temporal unit can contain more than one frame unit

3.) The frame unit can be structured in different ways (for example multiple
tile groups)

4.) The temporal units might hold additonal OBUs like metadata and/or tile
list.

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