I have installed both but doesn't workYou will need apt install v4l2loopback-dkms
And make sure the kernel module for your kernel gets build. May require installation of kernel headers too.
It wants your password because loading the loopback requires root permissions. I have this in root's crontabI tried installing using deb pack, and there is a button but not working (it just asked me my password)
@reboot:modprobe v4l2loopback exclusive_caps=1 card_label='OBS Virtual Camera' video_nr=99I can launch virtual cam now, but it did not add a camera device (/dev/video*), other programs also cannot see the deviceIt wants your password because loading the loopback requires root permissions. I have this in root's crontab@reboot:
modprobe v4l2loopback exclusive_caps=1 card_label='OBS Virtual Camera' video_nr=99
Copy/pasted from OBS's source code, so that's exactly what it wants, except I set the video number to not rearrange my physical cameras that I add and remove somewhat randomly.
That eliminates the password request from OBS, but of course requires the loopback itself to work. If yours works after you give it the password, then this is all that's left.