[Webkit-unassigned] [Bug 175472] New: WebRTC video does not resume receiving when switching back to Safari 11 on iOS

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=175472

            Bug ID: 175472
           Summary: WebRTC video does not resume receiving when switching
                    back to Safari 11 on iOS
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: andrew at tokbox.com

1. Join the same room on https://safari.opentokrtc.com on two devices, one that is iOS Safari, the other doesn't matter
2. Wait for both sides to send and receive video
3. On iOS, switch apps so Safari is in the background
4. Switch back to Safari

Result: Remote video is frozen or black
Expected: Remote video should resume flowing

I have tried calling .play() on the video to no avail. This also happens P2P, and I suspect that it is unrelated to the OpenTok stack, but I can produce a minimal repro app if needed. The tricky bit in setting this up though is that you must use multiple devices. I have done a similar test at https://webrtc.github.io/samples/src/content/peerconnection/pc1/ but video resumes flowing correctly, and I suspect this is because the video being sent is being affected by the same device.

Tested on iPhone with iOS beta 4 and iPad with iOS beta 5.

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