[Webkit-unassigned] [Bug 231452] New: Blank video after backgrounding PWA and resuming video with iOS 15.1 beta

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=231452

            Bug ID: 231452
           Summary: Blank video after backgrounding PWA and resuming video
                    with iOS 15.1 beta
           Product: WebKit
           Version: Safari 15
          Hardware: iPhone / iPad
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: vfarley at nvidia.com

This behavior can be seen on the by following the steps on this minimal test page: https://virginiafarley.github.io/samples/src/blank-video/

The steps to reproduce this bug are:

1. On iOS 15.1 beta, open the link https://virginiafarley.github.io/samples/src/blank-video/ in Safari
2. Create a PWA out of this link 
3. Click the "Capture canvas" button
4. Click the "Capture audio" button and allow microphone access when prompted
5. If video is not already playing, click "Play Video"
6. Switch to another application for 5-10 seconds
7. Return to the app and observe that the video state is paused
8. Click "Play Video" and observe that the video is blank while the video state is playing.  Note that the MediaStream is inactive at this point.

Expected behavior: After returning to the app and observing that the video is paused, clicking "Play Video" will resume the video.

Able to reproduce with iOS 15.1 beta. Unable to reproduce with iOS 15.0. No repro in Safari (without creating PWA).  Note that audio capture is required to reproduce since without it, video will still be in playing state when returning from backgrounding app.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20211008/a4a67323/attachment.htm>