Bug 259364 – REGRESSION (iOS 17 Beta): The camera preview is with a wrong resolution for a short time when the iOS User enables/disables the camera

• Component: WebRTC
• Status: RESOLVED FIXED

[Madara Freimane]

Summary:
The camera preview is with a wrong resolution for a short time when the iOS User enables/disables the camera OR joins a WebRTC call with video ON

Tested devices:
The bug is reproducible on:
- iPhone 12 Pro (iOS 17.0 Public Beta) with Safari (V17.0)
- iPhone 11 Pro Max (iOS 17 Public Beta, build: 21A5277j) and Safari
- iPhone 11 Pro Max (iOS 17 Public Beta, build: 21A5277j) and Google Chrome (V115.0.5790.130)

The bug is not reproducible on:
- iPhone 13 (iOS 16.5.1) and Safari
- iPhone 14 (iOS 16.5.1) and Safari
- iPhone XS (iOS 16.4.1) and Safari

Scenario:
Precondition:
Safari or Google Chrome browser opened on iOS 17 device

Steps:
Use case1:
1. iOS User joins WEbRTC call with video ON
2. iOS User observes local video preview while being in connecting state

Use case2:
1. iOS User disables and enables camera back 
2. iOS User observes the camera preview while changing the status of the camera

Actual result:
The camera preview is with a wrong resolution for a short time when the iOS User enables/disables the camera OR joins a call with video ON

Expected result:
The camera preview appears immediately with the correct resolution when the iOS User enables/disables the camera in a WebRTC call

Reproducibility:
90%


Additional information:
-Sysdiagnostics file added:
https://drive.google.com/file/d/1Z3IxXUjNdt4zWOubg4H52WrDGBXH3CGZ/view?usp=sharing
(bug reproduced at 23:25, EET, 20.07.2023.)

[Radar WebKit Bug Importer]

<rdar://problem/112621697>

[Madara Freimane]

Bug is still reproducible. 
3rd use case:
iOS User rotates device screen, and observes the camera preview

Tested devices and browsers:
- iPhone 11 Pro (iOS 17 Developer Beta 6, build: 21A5312c) and Safari
- iPhone 14 Pro (iOS 17 Public Beta 4, build: 21A5312c) and Safari
- iPhone 13 (iOS 17 Public Beta 4, build: 21A5312c) and Safari

Added a new sysdiagnostics file (bug reproduced at 12:13, EET, 17.08.2023.):
https://drive.google.com/file/d/1_I6m42MmuqeB6iwS4Mglf8XpIvm5fbPz/view?usp=sharing

Still seeing this on iOS 17.0 (21A5326a), Safari. The getUserMedia sample linked below is an easy way to reproduce the bug.

getUserMedia sample: https://webrtc.github.io/samples/src/content/getusermedia/gum/

getUserMedia source: https://github.com/webrtc/samples/tree/gh-pages/src/content/getusermedia/gum

[youenn fablet]

Pull request: https://github.com/WebKit/WebKit/pull/18069

Hi, I have same issue here, I would like to know is this issue being fixed? And which iOS version will launch this fixed.

[youenn fablet]

This is being investigated.

Thank you for your response, is there any workaround here?

[youenn fablet]

*** Bug 261330 has been marked as a duplicate of this bug. ***

[youenn fablet]

*** Bug 262618 has been marked as a duplicate of this bug. ***

[EWS]

Committed 270548@main (57afaa96431b): <https://commits.webkit.org/270548@main>

Reviewed commits have been landed. Closing PR #18069 and removing active labels.

[youenn fablet]

*** Bug 266686 has been marked as a duplicate of this bug. ***

[PhungDuong]

Dear @youenn fablet

This issue still persists in iOS 17.6.1
Please reopen this issue.

[PhungDuong]

Bug is still reproducible on iOS/iPad 18.1

[PhungDuong]

Bug is still reproducible on iOS/iPad 18.1.1
But only for camera of yourself, other camera is not. And the frequency is about 50%.