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nevcairiel · 5th April 2018, 08:10

I talked with a few people involved in AV1 the other day and they said that AV1 in WebM/MKV is not actually finally specified yet. For example, AV1 in ISOMBFF (MP4) is still under discussion, among other things about the bitstream format allowed in the container, since AV1 has two of those (Annex B and "normal"), and if both would be allowed you would need CodecPrivate to tell the difference. For consistencies sake, I would hope that WebM/MKV would follow the same logic that MP4 takes, so we don't have to deal with yet another difference.

I definitely didn't find a AV1-in-WebM/MKV spec written down anywhere, for that matter.

5th April 2018, 08:10	#593 \| Link
nevcairiel Registered Developer Join Date: Mar 2010 Location: Hamburg/Germany Posts: 10,348	I talked with a few people involved in AV1 the other day and they said that AV1 in WebM/MKV is not actually finally specified yet. For example, AV1 in ISOMBFF (MP4) is still under discussion, among other things about the bitstream format allowed in the container, since AV1 has two of those (Annex B and "normal"), and if both would be allowed you would need CodecPrivate to tell the difference. For consistencies sake, I would hope that WebM/MKV would follow the same logic that MP4 takes, so we don't have to deal with yet another difference. I definitely didn't find a AV1-in-WebM/MKV spec written down anywhere, for that matter. __________________ LAV Filters - open source ffmpeg based media splitter and decoders Last edited by nevcairiel; 5th April 2018 at 08:14.