Bug 245833

Summary: [iPhone 14] Outgoing audio disappears for WebRTC call when User rejoins the call with video option
Product: WebKit Reporter: Madara Freimane <madara.freimane>
Component: WebRTCAssignee: Nobody <webkit-unassigned>
Status: RESOLVED DUPLICATE    
Severity: Critical CC: karlcow, rychouwei, webkit-bug-importer, youennf
Priority: P2 Keywords: InRadar
Version: Safari 16   
Hardware: iPhone / iPad   
OS: iOS 16   
Attachments:
Description Flags
rendering in safari, firefox, chrome none

Madara Freimane
Reported 2022-09-29 08:52:27 PDT
Summary: Outgoing audio disappears for WebRTC call when User rejoins the call with video option Tested devices: Bug is reproducible with Safari on: * iPhone 14 | iOS 16.0, build: 20A357 * iPhone 14 | iOS 16.0.2, build: 20A380 Bug is not reproducible with Safari on: * iPhone 13 | iOS 16.0.2, build: 20A380 * iPhone 11 | iOS 16.0.2, build: 20A380 * iPhone XS | iOS 15.4.1 Scenario: Precondition: Safari browser opened User is in an active WebRTC call Steps: 1. iPhone 14 User leaves the call 2. iPhone 14 User rejoins the same call using video option Actual result: Outgoing audio disappears when User rejoins the call with video option Expected result: Outgoing audio does not disappear when User rejoins the call with video option Reproducibility: 80% Additional information: - Sysdiagnostics file: https://drive.google.com/file/d/1Tw3YPPOzFkV5vmw27irIGSJpLdpl6SZb/view?usp=sharing
Attachments
rendering in safari, firefox, chrome (944.64 KB, image/png)
2022-10-14 06:13 PDT, Karl Dubost 		no flags
Details
Show Obsolete (1) View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2022-10-04 08:07:45 PDT
<rdar://problem/100763073>
rychouwei
Comment 2 2022-10-13 02:12:25 PDT
We have same issue! this is a demo to reproduce: https://sdk-web-1252463788.cos.ap-hongkong.myqcloud.com/trtc/webrtc/test/4.14.4/mute-audio/index.html?roomId=88005 only reproduce on iPhone 14 series. Steps to reproduce: 1. open demo on iPhone 14 Safari. 2. open anthor demo on PC Chrome. 3. click "JOIN" to join room on both tabs. now both tabs can hear each other. 4. click "LEAVE" on iPhone 14 Safari. 5. click "JOIN" on iPhone 14 Safari. Now, tab on PC Chrome cannot hear iPhone 14 Safari.
Karl Dubost
Comment 3 2022-10-14 06:13:36 PDT
Created attachment 462984 [details] rendering in safari, firefox, chrome Tested on macOS 13.0 --- A Safari 16.1 18614.2.6.1.1 B Safari Technology Preview 16.4 18615.1.7.1 C Firefox Nightly 107.0a1 10722.10.14 D Google Chrome Canary 108.0.5355.0 5355.0 Screenshot position. B A C D
Karl Dubost
Comment 4 2022-10-14 06:14:28 PDT
Comment on attachment 462984 [details] rendering in safari, firefox, chrome Wrong bug sorry
Madara Freimane
Comment 5 2022-10-26 04:22:07 PDT
Bug is still reproducible Tested device: iPhone 14 | iOS 16.1, build: 20B82
youenn fablet
Comment 6 2022-11-03 03:46:00 PDT
I looked at the sysdiagnose, and I do not see any active WebRTC call (no libwebrtc logs). I can see some capture happening though. I can also see the local video element preview pausing and playing very quickly, I am not sure what is happening there.
Madara Freimane
Comment 7 2022-11-04 08:59:40 PDT
Hi, Youenn! 

When I rejoin WebRTC call using "video" option, I see that microphone is not functioning anymore, the “Microphone” button becomes muted and I am not able unmute the call, and in the same time outgoing / incoming video freezes and is not loaded. 
I added a new sysdiagnostics file https://drive.google.com/file/d/1FPqdo4Sem075vdNDABiED77Jc-ME0FyD/view?usp=share_link
 Reproduced issue at 17:48, 04.11.2022. (EET time zone) 

Device:
 iPhone 14 (iOS 16.1, build: 20B82)
youenn fablet
Comment 8 2022-11-07 05:49:59 PST
I see the same issue as https://bugs.webkit.org/show_bug.cgi?id=245831. It seems there is a freeze when starting an AudioContext, which in turns has impact on audio capture. Marking as duplicate of 245831. *** This bug has been marked as a duplicate of bug 245831 ***
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