Bug 187756 – Change the input camera in the sources & outputs example on Safari (11) with M.Way camera

• Component: WebRTC
• Status: RESOLVED FIXED

[theraudmickael]

## Browser affected
Safari Version 11.0 (13604.5.6) (macOS)

## Description
The example "Select sources & outputs" is not switching the video input devices as expected. I have 2 camera connected and the example let's me select CAM 2, but i got an error on console about constraint used.

## Steps to reproduce
1. Plug 2 camera on Mac device
2. Go to https://webrtc.github.io/samples/src/content/devices/input-output/
3. Change video source to M.Way camera (see "Amazon camera references")

## Expected results
I expect to see the other camera stream

## Actual results
I got an error on console : 
> [Log] navigator.getUserMedia error:  – OverconstrainedError {message: "Invalid constraint", constraint: "deviceId"} (main.js, line 116) OverconstrainedError {message: "Invalid constraint", constraint: "deviceId"} OverconstrainedErrorconstraint: "deviceId"

## Amazon camera references
- Link of the article | https://www.amazon.fr/M-Way-Résolution-Microphone-ajustable-Compatible/dp/B073F6WQFJ
- Name of the article | Webcam HD 720P, M.Way USB Caméra à Haut Résolution avec Microphone Intégré et Trépied ajustable Caméra PC pour Skype/MSN/Facebook/Twitter Compatible avec Windows 7, Windows 8, Windows 10 Mac OS 10.6 Noir
- Number of the article | M.WAYLOLV12GRA101
- ASIN | B073F6WQFJ

You can see this bug in github : https://github.com/webrtc/samples/issues/1033#issuecomment-405814817

[Radar WebKit Bug Importer]

<rdar://problem/42332178>

[youenn fablet]

Hi Mickael and thanks for the report.
Is it specific to the amazon camera or does it apply to any USB camera?
Is the Amazon camera working in other applications?

Can you try with Safari Tech Preview and check whether the issue is still reproducing?

[theraudmickael]

Created attachment 345245 [details]
Screenshot to confirm you this issue in Safari Technology Preview

Hi yauenn !

Thank you for your response.

For more informations, this bug it specific to the amazon camera (for the moment for me because i haven't a big pool of camera to test) and yes, my camera work with "Skype" version 8.25.0.5 (desktop software) or "Photo Booth Library" version 9.0 (904) software in my mac, for exemple.

For your last request, i tried with Safari Technology Preview and I have the same error. I will attach you a screenshot to confirm you this issue.

[youenn fablet]

I was able to repro the bug.
The issue might be for cameras that do support discrete frame rates, but not 30fps.
When adding frameRate: 15, the stream is actually created.

[youenn fablet]

*** Bug 187933 has been marked as a duplicate of this bug. ***

[youenn fablet]

*** Bug 188606 has been marked as a duplicate of this bug. ***

[youenn fablet]

Created attachment 347214 [details]
Patch

[Eric Carlson]

Comment on attachment 347214 [details]
Patch

Nice simple fix, thanks!

[EWS Watchlist]

Comment on attachment 347214 [details]
Patch

Attachment 347214 [details] did not pass win-ews (win):
Output: https://webkit-queues.webkit.org/results/8880378

New failing tests:
http/tests/security/canvas-remote-read-remote-video-blocked-no-crossorigin.html

[EWS Watchlist]

Created attachment 347265 [details]
Archive of layout-test-results from ews205 for win-future

The attached test failures were seen while running run-webkit-tests on the win-ews.
Bot: ews205  Port: win-future  Platform: CYGWIN_NT-6.1-2.9.0-0.318-5-3-x86_64-64bit

[WebKit Commit Bot]

Comment on attachment 347214 [details]
Patch

Clearing flags on attachment: 347214

Committed r234949: <https://trac.webkit.org/changeset/234949>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.