1530792 - getUserMedia OverconstrainedError trying to open 1080p video

Status: RESOLVED DUPLICATE of bug 1451394

(Core :: WebRTC: Audio/Video, defect, P2)

Description

[mkaisercross]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:65.0) Gecko/20100101 Firefox/65.0

Steps to reproduce:

Testing with a Logitech C920 Webcam.

Go to link:
https://webrtc.github.io/samples/src/content/getusermedia/resolution/

Click the red "Full HD" button.

Actual results:

The following error message is shown on page.

"getUserMedia: Constraints could be not satisfied."

Expected results:

Opens a video feed with video resolution of 1920x1080

Comment 1

[Dan Minor [:dminor]]

Using a Logitech C615 camera on my 2015 Macbook, I get "getUserMedia: Starting video failed". The same camera works in Chrome. The built in camera does not work in either Firefox or Chrome, I assume the resolution is too low.

The Logitech C615 works as expected on my Linux system.

There were changes to the OS X video capture code as part of Bug 1376873 so maybe that is causing the problem. I'm assuming the constraint handling code is platform independent, so it's more likely a problem with the capabilities being enumerated by the video capture code. I'll look into a regression window for this.

Comment 2

[Dan Minor [:dminor]]

Mozregression shows it was Bug 1376873 as suspected.

Comment 3

[Dan Minor [:dminor]]

[Tracking Requested - why for this release]:

Likely the same problem as Bug 1529907, but just in case it is not, we might as well track it separately.

Comment 4

[Dan Minor [:dminor]]

This appears to be a limitation of the OS X video capture implementation in webrtc.org. The allowed resolutions are in a table of presets here [1]. If I attempt to add AVCaptureSessionPreset1920x1080 to that table, I get a compile error saying it is not supported for OS X. We're more or less stuck with this unless someone fixes the upstream implementation or we switch to a different video capture implementation, for instance Chromium's in Bug 1451394. I'm resolving this as a dupe of that bug.

[1] https://searchfox.org/mozilla-central/rev/00f3836a87b844b5e4bc82f698c559b9966e4be2/media/webrtc/trunk/webrtc/modules/video_capture/objc/device_info.mm#27

Comment 5

[Dan Minor [:dminor]]

Attachment: Bug 1530792 - Check that deviceNumber is valid in GetDeviceName; r=jib

Comment 6

[Liz Henry (:lizzard) (relman/hg->git project)]

Is the patch in comment 4 something you're still planning to land?

Comment 7

[Dan Minor [:dminor]]

Oops, wrong bug number. Thanks for pointing that out!

Comment 8

[Dan Minor [:dminor]]

[Tracking Requested - why for this release]: Even though resolved DUPLICATE, this is still being tracked for Firefox 67, which means I get email about it on a regular basis. I don't think this should be tracked.