Black image when capturing from virtual camera
Using v4l2loopback and the new virtual camera feature from OBS-Studio (introduced in 26.1): While this seems to work with most applications, it unfortunately does not with Cheese 3.38.0.
Cheese lets me choose "Dummy video device (0x0000)" in the preferences, but the picture always stays black.
(In contrast, ffplay /dev/video0, vlc v4l2:///dev/video0, or Firefox all work with the virtual camera.)