command-snippets/create-multiple-v4l-loopback-devices.md

# list
v4l2-ctl --list-devices
# create 3 devices
modprobe v4l2loopback devices=3 video_nr=8,9 exclusive_caps=1,1,1 card_label="Loopback-1,Loopback-2,Loopback-3"