Bug 230698

Summary:

REGRESSION: getUserMedia camera stream fails after viewing a screenshot

Product:

WebKit

Reporter:

Joel Udwin <joel>

Component:

WebRTC

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED DUPLICATE

Severity:

Normal

CC:

eric.carlson, webkit-bug-importer, youennf

Priority:

Keywords:

InRadar

Version:

Other

Hardware:

iPhone / iPad

OS:

Other

See Also:

https://bugs.webkit.org/show_bug.cgi?id=207489

Attachments:

Description	Flags
Camera Feed Turning Black on iOS 15	none

Description Joel Udwin 2021-09-23 11:00:34 PDT

Created attachment 439068 [details]
Camera Feed Turning Black on iOS 15

On iOS 15 getUserMedia camera stream fails after viewing a screenshot (instant markup). This previously worked on iOS 14.8.

After the users exits the instant markup view, Safari give no indication of a change (‘VisibilityChange’, ‘pageshow’ are not called). At this point, (video.videoWidth>0 while video.currentTime remains 0).

Reproduction Steps:
1. Open https://webrtc.github.io/samples/src/content/getusermedia/gum/ on iOS15
2. Take a screenshot by pressing the power button and the volume up button
3. Open the screenshot preview (instant markup)
4. Either press delete, or save
5. The camera feed is now black (getUserMedia camera stream has failed)

Attached is an example video on iOS 15

Please let me know if I can provide more info, thank you.

Comment 1 Radar WebKit Bug Importer 2021-09-29 02:24:34 PDT

<rdar://problem/83662830>

Comment 2 youenn fablet 2021-09-29 02:28:31 PDT

Thanks Joel, I think this is indeed a regression where camera track gets muted.
This is detectable using onmuted.
But we do not unmute when getting back.
Putting Safari in the background for a second then back to foreground is unmuting the track.
This is most probably https://bugs.webkit.org/show_bug.cgi?id=230538.

*** This bug has been marked as a duplicate of bug 230538 ***