Webcam does not work with v107.0.5304.121-hwacc

[Pierre Equoy]

With the latest version of Chromium in the stable channel (108.0.5359.94), I can access the webcam and the microphone in Google Meet and Jitsi (using a framatalk.org instance).

However, with version 107.0.5304.121-hwacc (from latest/candidate/hwacc branch), the same test does not work.

The only difference between the two in `snap connections chromium` is

content chromium:va-driver-non-free - -

Test:

1. Install Chromium from the given channel
2. Go to https://framatalk.org/ and click on "Create a room"
3. Accept the permissions to access Microphone and Camera

Expected result:

Image from camera is displayed on screen

Actual result:

The webcam is turned on (the LED turns on), but no image is captured, and after a few seconds, an error message is displayed ("We are unable to access your camera").

In the settings, I can see the camera name ("UVC Camera (046d:0802)").

Attached are two logs:

- One retrieved by launching Chromium with `chromium --enable-logging=stderr`, accessing framatalk.org and clicking on "Create a room".
- One retrieved by launching Chromium with `chromium --enable-logging=stderr` and accessing a Google Meet event.

Configuration information
=========================

- Desktop with AMD GPU RX580
- Ubuntu 20.04 (kernel 5.15.0-56-generic)
- Webcam: 046d:0802 Logitech, Inc. Webcam C200
- Headset: 046d:0a38 Logitech, Inc. Headset H340

[Nathan Teodosio (nteodosio)]

Thanks for the report.

Can you please

1. confirm that the issue is reproducible with the Pipewire flag in about:flags turned on?

2. attach the output of journalctl around the time that happens?

[Pierre Equoy (pieq)]

1. The Pipewire flag was set to "Default", but even when set to "Enabled", the webcam does not work.
2. journalctl.log attached when accessing framatalk.org and creating a room.

[Pierre Equoy (pieq)]

And this is the logs from Chromium when running the steps in the previous comment.

[Ike Panhc (ikepanhc)]

I can reproduce this issue and if I disable hardware acceleration in settings::system, tab will crash when webcam starting.

[Bram Stolk (b-stolk)]

@ikepanhc Thanks. What model webcam do you have?

[Bram Stolk (b-stolk)]

I have tried to repro this.

chromium: 107.0.5304.121-hwacc on Ubuntu 22.10

Logitech, Inc. QuickCam Vision Pro [WORKS]

IMC Networks USB2.0 HD UVC WebCam [WORKS]

Could it be that this issue happens with MIPI cameras only? My tests were with USB based cams.

[Ricardo Martins (ricardofcmartins)]

Hi all,

I'm also having issues with my integrated MIPI camera.
USB peripheral camera is ok.

v4l-info shows
   VIDIOC_QUERYCAP
 driver : "v4l2 loopback"
 card : "Intel MIPI Camera"
 bus_info : "platform:v4l2loopback-000"
 version : 5.15.64
 capabilities : 0x85200001 [VIDEO_CAPTURE,?,READWRITE,STREAMING,(null)]

Attached journalctl log for reference.
Let me know if I can provide any more meaningful details.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Pierre Equoy (pieq)]

Just to clarify, my webcam is a very simple (and old, like 10 years old!) USB webcam: 046d:0802 Logitech, Inc. Webcam C200.

Attached output from v4l-info.

[Ike Panhc (ikepanhc)]

@b-stolk

My webcam is 0bda:5641 Realtek Semiconductor Corp. LG Camera.
Driver is uvcvideo

[Nathan Teodosio (nteodosio)]

Trying to record from my webcam, 0408:a061 Quanta Computer, Inc. HD User Facing, also fails (black screen) and spams the stderr with

[295956:295956:1216/143222.257386:ERROR:shared_image_factory.cc(765)] Could not find SharedImageBackingFactory with params: usage: |Gles2|Raster|Display|Scanout, format: 19, share_between_threads: 0, gmb_type: platform
[295956:295956:1216/143222.257834:ERROR:shared_image_stub.cc(158)] SharedImageStub: Unable to create shared image
[296185:5:1216/143222.285003:ERROR:video_capture_impl.cc(677)] GPU factories handle changed; assuming GPU context lost

Tested on Xorg.

[Bram Stolk (b-stolk)]

Note: the `content chromium:va-driver-non-free` connection is completely harmless.

We just added an extra path to get drivers from an alternate snap if so required, in the future, for patent reasons.

This is a currently unused provision, and no free drivers are built or used.

[Bram Stolk (b-stolk)]

@ikepanhc Which GPU do you have? Intel, AMD or nVidia?

$ sudo apt install inxi
$ inxi -G

Thanks.

[Bram Stolk (b-stolk)]

My current theory is that we broke video input for non Intel platforms.

On my machine with AMD GPU, I get:

ERROR:gpu_memory_buffer_support_x11.cc(134)] Can't create buffer -- gbm device is missing

$ inxi -G
Graphics:
  Device-1: AMD Ellesmere [Radeon RX 470/480/570/570X/580/580X/590]
    driver: amdgpu v: kernel
  Device-2: Logitech QuickCam Vision Pro type: USB
    driver: snd-usb-audio,uvcvideo
  Display: server: X.Org v: 1.22.1.3 driver: X: loaded: amdgpu,ati
    unloaded: fbdev,modesetting,radeon,vesa gpu: amdgpu
    resolution: 3840x2160~120Hz
  OpenGL: renderer: llvmpipe (LLVM 13.0.1 256 bits) v: 4.5 Mesa 22.0.5

UPDATE:

The "device is missing" error goes away with:
$ CHROMIUM_FLAGS="--disable-video-capture-use-gpu-memory-buffer" chromium
But it is replaced with this error:
ERROR:v4l2_capture_delegate.cc(1105)] Error to convert to PIXEL_FORMAT_NV12

[Nathan Teodosio (nteodosio)]

With the flag changes[1] that went in the hwacc/edge my webcam works again.

[1]: https://git.launchpad.net/~chromium-team/chromium-browser/+git/snap-from-source/commit/?id=4c051e7082153f898e46e27d56466ae497cbfdfe

[Bram Stolk (b-stolk)]

Intel provided guidance on how to address this. I will make a merge request.

[Nathan Teodosio (nteodosio)]

This is no longer a thing in the current version. If someone notes the contrary, please reopen the bug.