[Webkit-unassigned] [Bug 85851] MediaStream API: support MediaStreamRecorder implementation

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Jul 19 06:14:15 PDT 2021


Michael L <michael at myinterview.com> changed:

           What    |Removed                     |Added
                 CC|                            |michael at myinterview.com

--- Comment #92 from Michael L <michael at myinterview.com> ---

I noticed that on our recordings, it doesn't seem that the webkit implementation follows the bitrate guidelines.

When initiating the MediaRecorder object we pass this options config object:

    bitsPerSecond: 2000000

In theory that should limit the recording to a maximum of 1953 kb/s.

We see on multiple occurences (eg on Safari 14.1.1 on iOS 14.6) that the output file has a much bigger bitrate (eg 9700 kb/s just for the video) which produces files that are hard to upload given the size. Is this a known issue ? Is there a workaround ? (like using videoBitsPerSecond instead of bitsPerSecond ?)


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