REOPENED 230624
MediaStream canvas.captureStream() for Canvas element provides frames too late 
https://bugs.webkit.org/show_bug.cgi?id=230624
Summary MediaStream canvas.captureStream() for Canvas element provides frames too late
Kimmo Kinnunen
Reported 2021-09-22 06:28:44 PDT
MediaStream canvas.captureStream() for Canvas element provides frames too late To observe, obtain bug 230613 testcase mediastream-canvas-to-video.html When canvas draws, the frame should go to the video. Instead it doesn't go anywhere. When the canvas draws a new frame, previous frame goes to video.
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Radar WebKit Bug Importer
Comment 1 2021-09-29 06:29:18 PDT
<rdar://problem/83668648>
Kimmo Kinnunen
Comment 2 2021-10-01 02:56:43 PDT
Will be fixed by bug 231022 *** This bug has been marked as a duplicate of bug 231022 ***
Kimmo Kinnunen
Comment 3 2021-10-01 03:12:59 PDT
Scratch that, probably too risky. Should fix it separately
Kimmo Kinnunen
Comment 4 2021-10-01 03:25:32 PDT
The frame should be captured and provided to video element during canvas display buffer preparation. However, at that moment the tree is already laid out. Submitting a frame will cause needs-layout assertion.
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