OBS Virtual Camera not working on Manjaro KDE

Support Software & Applications
1

Hi everyone,

I’m experiencing issues with the OBS Virtual Camera on Manjaro KDE (Wayland session). The virtual camera fails to start, and OBS logs show the following error:

Failed to start streaming on '/dev/video2' (Invalid argument)
Failed to start virtual camera.

In the graphical interface in OBS displays this error:

Output failed. Please check the log for details.
Note: If you are using NVENC or AMD encoders, make sure you have the latest video drivers installed.

I’ve tried so far:

  1. Reinstalled and loaded v4l2loopback with parameters like exclusive_caps=0.
  2. Checked that /dev/video2 exists and is accessible.
  3. Changed kernels.
  4. Reinstalled obs, including flatpak
  5. Changed users

Additional details:

  • I noticed the problem after the latest system update, but it might have occurred earlier as I hadn’t used the virtual camera for a couple of weeks.
  • My system uses an integrated AMD GPU.
  • The issue persists across kernels (6.6 and 6.12).

inxi info

Any ideas on how to fix this? Let me know if you need more logs or system details.

2

Ok, I managed to fix the issue.
It seems the problem lies in the new version of v4l2loopback-dkms .
Downgrading to version 0.13.2 resolves the issue.
This is, of course, a temporary workaround, so let’s hope for updates soon!

The source

3

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