Pipewire camera support for Kamoso, Firefox and IMs

[nagmat84]

I was finally able to get the IPU6 camera on a Lenovo X1 Carbon to work. I had to install the Intel USB IO drivers via DKMS, apply some kernel patches from the Fedora project to Gentoo sources and install media-video/pipewire as well as media-libs/libcamera from the overlay EnillienMottet.

Now, I can finally grab a video with QCam from the IPU6 camera. QCam is part of media-libs/libcamera, so the kernel/driver side works. Also wpctrl looks good and reports the "Built-in front camera (OVTI08F4:00)".

Code: Select all

wpctl status
PipeWire 'pipewire-0' [1.2.7, sophie@Sophies-Laptop, cookie:4116066288]
 └─ Clients:
        33. kwin_wayland                        [1.2.7, sophie@Sophies-Laptop, 
pid:8199]
        34. WirePlumber                         [1.2.7, sophie@Sophies-Laptop, 
pid:8256]
        42. WirePlumber [export]                [1.2.7, sophie@Sophies-Laptop, 
pid:8256]
        43. pipewire                            [1.2.7, sophie@Sophies-Laptop, 
pid:8374]
        44. libcanberra                         [1.2.7, sophie@Sophies-Laptop, 
pid:8311]
        77. xdg-desktop-portal                  [1.2.7, sophie@Sophies-Laptop, 
pid:8207]
        78.                                     [1.2.7, sophie@Sophies-Laptop, 
pid:8311]
        81. libcanberra                         [1.2.7, sophie@Sophies-Laptop, 
pid:8358]
        82. plasmashell                         [1.2.7, sophie@Sophies-Laptop, 
pid:8358]
        83.                                     [1.2.7, sophie@Sophies-Laptop, 
pid:8358]
        84. KDE Connect-Dienst                  [1.2.7, sophie@Sophies-Laptop, 
pid:8617]
        85. wpctl                               [1.2.7, sophie@Sophies-Laptop, 
pid:14470]

Audio
 ├─ Devices:
 │      46. Meteor Lake-P HD Audio Controller   [alsa]
 │  
 ├─ Sinks:
 │      51. Meteor Lake-P HD Audio Controller HDMI / DisplayPort 3 Output 
[vol: 1.00 MUTED]
 │      52. Meteor Lake-P HD Audio Controller HDMI / DisplayPort 2 Output 
[vol: 1.00 MUTED]
 │      53. Meteor Lake-P HD Audio Controller HDMI / DisplayPort 1 Output 
[vol: 1.00 MUTED]
 │  *   54. Meteor Lake-P HD Audio Controller Speaker [vol: 0.30 MUTED]
 │  
 ├─ Sources:
 │      55. Meteor Lake-P HD Audio Controller Headphones Stereo Microphone 
[vol: 1.00]
 │  *   56. Meteor Lake-P HD Audio Controller Digital Microphone [vol: 0.32 
MUTED]
 │  
 ├─ Filters:
 │  
 └─ Streams:

Video
 ├─ Devices:
 │      45. ov08x40                             [libcamera]
 │  
 ├─ Sinks:
 │  
 ├─ Sources:
 │  *   79. Interne vordere Kamera             
 │  
 ├─ Filters:
 │  
 └─ Streams:

Settings
 └─ Default Configured Devices:
         0. Audio/Sink    bluez_output.10_94_97_07_C2_CC.1
         1. Audio/Source  alsa_input.usb-
Yamaha_Corporation_Steinberg_UR44C-00.HiFi__Line3__source

However, no other userland application than QCam is able to find the camera (Kamoso, Firefox, Chrome, Chromium, IMs, etc.) I forcefully enabled Pirewire support in Firefox with about:config media.webrtc.camera.allow-pipewire and in Chrome with chrome://flags/#enable-webrtc-pipewire-capturer, but this had no effect.

What am I missing? From my understanding the userland application should be compiled with libcamera support on Gentoo. So when libcamera finds the camera and can use it, so should these applications. Any ideas?