[Webkit-unassigned] [Bug 208134] New: Random audio volume of WebRTC remote audio stream

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=208134

            Bug ID: 208134
           Summary: Random audio volume of WebRTC remote audio stream
           Product: WebKit
           Version: Safari 13
          Hardware: iPhone / iPad
                OS: iOS 13
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: m.zdila at gmail.com
                CC: youennf at gmail.com

When webrtc connection is established and both ends send and receive audio and video and if remote stream is attached to video element then it has random volume. It is either loud, silent or completly muted. Executing video.srcObject =  video.srcObject causes to jump between these volumes.

You can try it eg. on https://janus.conf.meetecho.com/videocalltest.html:

1. Join from Safari on iOS 13.3.1, on the other end in my case it was Chrome on Linux but other platforms were reported as well.
2. Audio volume on iPhone is one of 3 mentioned (random)
3. Execute in JS console on iOS Safari: document.getElementsByTagName('video')[1].srcObject = document.getElementsByTagName('video')[1].srcObject;
4. goto 2

Issue can be reproduced also for example on www.gruveo.com.

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