Bug 208134

Summary:	Random audio volume of WebRTC remote audio stream
Product:	WebKit	Reporter:	Martin Ždila <m.zdila>
Component:	WebRTC	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED DUPLICATE
Severity:	Normal	CC:	eric.carlson, feross, gareth.lloyd, hyugrae.cho, sarmistha, webkit-bug-importer, youennf
Priority:	P2	Keywords:	InRadar
Version:	Safari 13
Hardware:	iPhone / iPad
OS:	iOS 13

Description Martin Ždila 2020-02-24 07:31:44 PST

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.

Comment 1 Radar WebKit Bug Importer 2020-02-24 19:10:15 PST

<rdar://problem/59751337>

Comment 2 Josh Cho 2020-04-10 23:01:13 PDT

I also found the same problem in my product, a web-conference application for medical devices.
(it can be easily reproduced in WebRTC sample pages, https://webrtc.github.io/samples, as well.  

The volume control of WebRTC in Safari browser version 13 for iPhone and iPad is totally out of control.

Is there any workaround to avoid this problem?

Comment 3 Josh Cho 2020-04-10 23:01:19 PDT

I also found the same problem in my product, a web-conference application for medical devices.
(it can be easily reproduced in WebRTC sample pages, https://webrtc.github.io/samples, as well.  

The volume control of WebRTC in Safari browser version 13 for iPhone and iPad is totally out of control.

Is there any workaround to avoid this problem?

Comment 4 Gareth Lloyd 2020-04-22 06:23:59 PDT

Does anyone know how to determine if/when Apple will fix this? This is a complete nightmare for anyone trying to use WebRTC audio/video calls :-(

Comment 5 Martin Ždila 2020-04-23 04:47:46 PDT

Symptoms seems to be same as in https://bugs.webkit.org/show_bug.cgi?id=198545

*** This bug has been marked as a duplicate of bug 198545 ***

Comment 6 youenn fablet 2020-04-23 06:06:23 PDT

Reopening as this probably requires a dedicated solution.

Comment 7 Sarmistha 2020-04-24 05:41:16 PDT

We are seeing 2 issues with iOS 13.3.1. Participant A on iPhone 11 with iOS 13.3.1 and participant B on IE(Electron).

1. Participant A on iPhone can't hear participant B after WebRTC connection is established. Mobile browser refresh on iPhone is resolving it.

2. Participant B on IE can't hear participant A on iPhone after WebRTC connection is established. Mobile browser refresh on iPhone is NOT resolving it.

This issue is causing lots of user dissatisfaction. Will the fix of 208134 resolve both conditions?

Is there any update on fix timeline?

Comment 8 youenn fablet 2020-05-14 02:17:48 PDT

https://bugs.webkit.org/show_bug.cgi?id=211287 seems to help as well.

Comment 9 youenn fablet 2020-06-08 11:02:07 PDT

Please test it on latest iOS 13.5.5 beta

*** This bug has been marked as a duplicate of bug 211287 ***