Camera to OBS

• Install following

sudo apt install v4l2loopback-dkms gphoto2

• Start loopback device

sudo modprobe v4l2loopback exclusive_caps=1 max_buffer=2

• Stream camera feed to ffmpeg to video device

gphoto2 --stdout --set-config viewfinder=1 --capture-movie | ffmpeg -i - -vcodec copy -threads 1 -f v4l2 /dev/video0