codec: fix AV1 documentation of extradata
The data correspond to the AV1CodecConfigurationRecord
, not the
AV1CodecConfigurationBox
(with "av1C").
The first 4 bytes are not parsed as we use the same info found in the first OBU.
In both cases we need the Sequence Header because we need values that are not in the 4 bytes. libaom doesn't write a Sequence Header OBU, just the mandatory 4 bytes.
Edited by Steve Lhomme