[Webkit-unassigned] [Bug 174408] New: Resolution of video with disabled video track not available when using mock capture devices

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=174408

            Bug ID: 174408
           Summary: Resolution of video with disabled video track not
                    available when using mock capture devices
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: andrew at tokbox.com

jsbin: https://output.jsbin.com/pitocoz

Output with real devices:
2017-07-12T00:23:28.231Z: got stream
2017-07-12T00:23:28.234Z: calling .play()
2017-07-12T00:23:28.837Z: resolution by polling: 640x480

Output with fake devices:
2017-07-12T00:26:20.950Z: got stream
2017-07-12T00:26:20.952Z: calling .play()

This is causing problems for automated testing. There's also the issue around failing to play in either case above - here's Firefox's output which I suspect is the correct behaviour:

2017-07-12T00:28:31.575Z: got stream
2017-07-12T00:28:31.575Z: calling .play()
2017-07-12T00:28:31.709Z: loadedmetadata: {
  "isTrusted": true
}
resolution: 640x480
2017-07-12T00:28:31.709Z: play success
2017-07-12T00:28:31.778Z: resolution by polling: 640x480

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