Bug 274599 – REGRESSION(iOS 17.5): getUserMedia camera access doesn't work in the simulator

• Component: Media
• Status: RESOLVED DUPLICATE

[Ali Juma]

Prior to iOS 17.5, getUserMedia camera access worked in the simulator (in WKWebView-based apps but not in Safari) in the sense that after the user accepted the permission prompt, the web page would receive a test pattern simulating a video stream coming from the camera.

Chrome for iOS relies on this behavior for unit and integration tests involving camera permission prompts.

However, on iOS 17.5, this no longer works -- after the user accepts the prompt, the video capture fails. In the console, we get the following output on https://webrtc.github.io/samples/src/content/getusermedia/gum/:

[Log] Got stream with constraints: – {audio: false, video: true} (user-script:29, line 1)
[Log] Using video device: Mock video device 1 (user-script:29, line 1)
[Error] A MediaStreamTrack ended due to a capture failure

[Radar WebKit Bug Importer]

<rdar://problem/128678958>

[Brent Fulgham]

Hi Ali: Could you please confirm which iOS version worked properly? Was it iOS 17.4, or even an earlier release?

[Ali Juma]

(In reply to Brent Fulgham from comment #2)
> Hi Ali: Could you please confirm which iOS version worked properly? Was it
> iOS 17.4, or even an earlier release?

It was working in 17.4 (as well as in earlier releases).

[youenn fablet]

*** This bug has been marked as a duplicate of bug 272551 ***

[youenn fablet]

This is probably a dupe of https://bugs.webkit.org/show_bug.cgi?id=272551.
@Ali, do you see release logging in the GPU process like:
"Unable to set media environment, failing capture."?

[Ali Juma]

(In reply to youenn fablet from comment #5)
> This is probably a dupe of https://bugs.webkit.org/show_bug.cgi?id=272551.
> @Ali, do you see release logging in the GPU process like:
> "Unable to set media environment, failing capture."?

Yes, I do see that logging. Thanks for the pointer to the fix!

[youenn fablet]

(In reply to Ali Juma from comment #6)
> (In reply to youenn fablet from comment #5)
> > This is probably a dupe of https://bugs.webkit.org/show_bug.cgi?id=272551.
> > @Ali, do you see release logging in the GPU process like:
> > "Unable to set media environment, failing capture."?
> 
> Yes, I do see that logging. Thanks for the pointer to the fix!

It might be a fallout of https://bugs.webkit.org/show_bug.cgi?id=270995