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Re: [mediacapture-record] Input width, height MUST be recorded and playable (#172)

From: guest271314 via GitHub <sysbot+gh@w3.org>
Date: Mon, 08 Jul 2019 15:46:55 +0000
To: public-webrtc-logs@w3.org
Message-ID: <issue_comment.created-509281071-1562600814-sysbot+gh@w3.org>
@jnoring Re-opened the issue as could also not locate any specific language in the relevant specifications where Matroska container and derived WebM format restricts variable input stream `width` and `height`. Re-opened the issue; the author of `mkvmerge` acknowledges the above facts https://gitlab.com/mbunkus/mkvtoolnix/issues/2582#note_189460892

> You're right that the specs don't forbid it. However, this only works for video formats that have their width & height encoded at the bitstream level for each key frame as there's only one place those values can be stored at the container level. This isn't the case for all video codecs.
> I can remove this check for codecs that do contain that information, which include VP8, VP9, AV1, h.264 & h.265 (and with that the most popular codecs today).

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Received on Monday, 8 July 2019 15:46:57 UTC

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