#!/bin/sh -eu

program=$(basename "$0")
option=${1:-0@9}
real=${option%%@*}
virtual=${option#*@}

{
	[ "$option" = "help" ] ||
	[ "$option" = "-help" ] ||
	[ "$option" = "--help" ]
} &&
	printf '%s 0@9\n# /dev/video0 -> /dev/video9\n' "$program" &&
	exit

{
	[ "$option" = "kill" ] ||
	[ "$option" = "-kill" ] ||
	[ "$option" = "--kill" ]
} &&
	killall mplayer &&
  killall mplayer &&
  killall ffmpeg &&
	exit

ffmpeg -i "/dev/video$real" -f v4l2 -vcodec rawvideo -pix_fmt rgb24 "/dev/video$virtual" &
sleep 2
mplayer tv:// -tv "driver=v4l2:device=/dev/video$virtual" -fps 15