[Webkit-unassigned] [Bug 220799] New: getUserMedia in STP 118 returns NotReadableError

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=220799

            Bug ID: 220799
           Summary: getUserMedia in STP 118 returns NotReadableError
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Mac (Intel)
                OS: macOS 10.15
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ssim at bluejeans.com
                CC: youennf at gmail.com

After upgrading STP to 118, getUserMedia asks for permissions and then consistently returns "NotReadableError: The I/O read operation failed."

Steps to reproduce
1. Use STP 118 on Catalina or Big Sur
2. Go to https://webrtc.github.io/samples/src/content/getusermedia/gum/
3. Click "Open Camera"

Happens 100% of the time
gUM for audio returns a MediaStream, but for video we get the error

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