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Re: [webrtc-svc] L3T1_KEY is missing from the table, but not the diagram section (#81)

From: DanilChapovalov via GitHub <sysbot+gh@w3.org>
Date: Thu, 09 Feb 2023 16:04:56 +0000
To: public-webrtc-logs@w3.org
Message-ID: <issue_comment.created-1424436108-1675958694-sysbot+gh@w3.org>
L3T1_KEY is a valid scalability mode. Chrome should already support it both for AV1 and VP9.

AV1 spec doesn't have dedicated scalability_mode_idc for it in Metadata OBU, so encoder that wish to produce such optional OBU would have to use generic SCALABILITY_SS.

It was probably missed because L3T1_KEY_SHIFT is not a valid structure, and in the AV1 spec there is 1:1 relation between _KEY and _KEY_SHIFT structures.

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Received on Thursday, 9 February 2023 16:04:58 UTC

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