[Webkit-unassigned] [Bug 257956] New: MediaStream from canvas (captureStream) cannot be rendered into a different canvas

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=257956

            Bug ID: 257956
           Summary: MediaStream from canvas (captureStream) cannot be
                    rendered into a different canvas
           Product: WebKit
           Version: Safari 16
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Canvas
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.leber at sqanit.com
                CC: dino at apple.com

The Mediastream returned from a canvas captureStream call can not be used to be rendered into another canvas using drawImage (2d context) or createImageBitmap/transferFromImageBitmap (bitmaprenderer context)
The following CodePen shows the problem in a short example.

https://codepen.io/sleb91/pen/bGQdPxq

I have tested on Safari on Mac (Version 16.5 (18615.2.9.11.4)) and latest IOS Safari (16.5)

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