[Webkit-unassigned] [Bug 229611] MediaRecorder with canvas captureStream() produces blank video

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Nov 19 18:40:45 PST 2021


Kongpheng <Kongpheng.Nanthavongsa at vonage.com> changed:

           What    |Removed                     |Added
                 CC|                            |Kongpheng.Nanthavongsa at vona
                   |                            |ge.com

--- Comment #7 from Kongpheng <Kongpheng.Nanthavongsa at vonage.com> ---
Issue still reproducible on Safari version 15.1 (15612., 15612).

Another way to reproduce:
* Open https://webrtc.github.io/samples/src/content/capture/canvas-video/
* Using mouse, move teapot on the left side around, by holding down left-click and dragging your mouse around
* Notice that teapot on the right doesn't mirror the left teapot's movement

I wonder if issue is due to auto-play constraint violation.  Console logs follows.

MediaElementSession::clientWillBeginAutoplaying(74E6F415461C6466) state = Autoplaying
HTMLMediaElement::setShouldDelayLoadEvent(74E6F415461C6466) true
MediaElementSession::removeBehaviorRestriction(74E6F415461C6466) removed RequirePageConsentToLoadMedia
MediaElementSession::autoplayPermitted(74E6F415461C6466) Returning FALSE because element is not visible in the viewport
MediaElementSession::beginInterruption(74E6F415461C6466) state = Autoplaying, interruption type = InvisibleAutoplay, interruption count = 0

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