[Webkit-unassigned] [Bug 191878] New: video freezes on Safari when the other side keeps rotating camera

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=191878

            Bug ID: 191878
           Summary: video freezes on Safari when the other side keeps
                    rotating camera
           Product: WebKit
           Version: Safari 12
          Hardware: iPhone / iPad
                OS: iOS 12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: diccarp2017 at gmail.com
                CC: youennf at gmail.com

Created attachment 355396

  --> https://bugs.webkit.org/attachment.cgi?id=355396&action=review

Video showing how screen freezes

What steps will reproduce the problem?
1. One iPhone and one Android phone connect to https://appr.tc and join the same room. The iPhone uses a lossy network (5% packet loss).
2. Screen rotation is on on Android. Keep rotating the screen (like the video in the attachment).
3. After a while (3 minutes), the video on iOS safari freezes and the Android phone shows black screen. Audio is still on.

What is the expected result?
The video should play smoothly.

What do you see instead?
Video freezes on iOS safari and Android chrome shows black screen.

What version of the product are you using? On what operating system?
iPhone: iPhone 5S with iOS 12.1 with Safari.
Android phone: One plus 3 with Android 8.0 with Chrome 69.

Please provide any additional information below.
I also tried iPhone X and can reproduce the same result.
Even if I turned off screen rotation on Android, it could still be reproducible but it took longer.
It's easier to reproduce it on lossy network. I couldn't reproduce it if the network was good.

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