Duplicate a stream:
modprobe v4l2loopback devices=2 card_label="Mike er en hest","Det er brian oxo" ffmpeg -f video4linux2 -s 800x600 -i /dev/video0 -codec copy -f v4l2 /dev/video2 -codec copy -f v4l2 /dev/video3
Duplicate a stream:
modprobe v4l2loopback devices=2 card_label="Mike er en hest","Det er brian oxo" ffmpeg -f video4linux2 -s 800x600 -i /dev/video0 -codec copy -f v4l2 /dev/video2 -codec copy -f v4l2 /dev/video3