[Webkit-unassigned] [Bug 257016] New: Media recorder produces empty chunks

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=257016

            Bug ID: 257016
           Summary: Media recorder produces empty chunks
           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: 32jojo32 at gmail.com
                CC: dino at apple.com

Created attachment 466413

  --> https://bugs.webkit.org/attachment.cgi?id=466413&action=review

canvas-bug-mwe

When attaching MediaStream before context in canvas is created then MediaRecorder produces only empty chunks.

Steps to replicate:

1. Open the provided html file
2. Click the button
3. You will see only empty chunks in console
4. Uncomment the line #14 and comment code on line #17
5. Click the button again
6. You will see one non-empty chunk in console

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