Virtual camera on OBS-Studio not working

[Paul Smith]

Dear All,

I have upgraded from F33 to F34. Everything is working fine now except
the OBS-Studio virtual camera, which is not working.

I am using v4l2loopback, and I see that my camera lights up when I
open OBS-Studio, but suddenly it goes off.

There is no problem with my camera, as it works fine on Skype, for instance.

Any ideas?

Thanks in advance,

Paul