He Junyan authored Sep 22, 2020 and GStreamer Marge Bot committed Jan 19, 2021

This AV1 parse implements the conversion between alignment of obu,
tu and frame, and the conversion between stream-format of obu-stream
and annexb.

TODO:
1. May need a property of operating_point to filter the OBUs
2. May add a property to disable deep parse.

Part-of: <!1614>