Display 4 Camera RTSP Streams on Ubuntu with Mplayer and Screen

sudo apt install screen

sudo nano /etc/init.d/cams

#!/bin/bash 
### BEGIN INIT INFO 
# Provides: mplayer
# Required-Start: 
# Required-Stop: 
# Default-Start: 2 3 4 5 
# Default-Stop: 0 1 6 
# Short-Description: Displays camera feeds for monitoring 
# Description: 
### END INIT INFO

# Output mplayer to remote device if using ssh remotely
if [ -n "$SSH_TTY" ]; then
export DISPLAY=:0.0
fi

# Camera Feeds & Positions
top_left="screen -dmS top_left sh -c 'mplayer -noborder -x 640 -y 400 -geometry 0:0 rtsp://admin:admin@10.148.1.6:554/live1.264'";
top_right="screen -dmS top_right sh -c 'mplayer -noborder -x 640 -y 400 -geometry 640:0 rtsp://admin:admin@10.148.1.2:554'";
bottom_left="screen -dmS bottom_left sh -c 'mplayer -noborder -x 640 -y 400 -geometry 0:400 rtsp://admin:admin@10.148.1.4:554'";
bottom_right="screen -dmS bottom_right sh -c 'mplayer -noborder -x 640 -y 400 -geometry 640:400 rtsp://admin:admin@10.148.1.5:554'";

# Camera Feed Names 
# (variable names from above, separated by a space) 
camera_feeds=(top_left top_right bottom_left bottom_right)

#---- There should be no need to edit anything below this line ----

# Start displaying camera feeds 
case "$1" in 
start) 
for i in "${camera_feeds[@]}" 
do 
eval eval '$'$i 
done 
echo "Camera Display Started" 
;;

# Stop displaying camera feeds 
stop) 
sudo killall mplayer 
echo "Camera Display Ended" 
;;

# Restart any camera feeds that have died 
repair) 
for i in "${camera_feeds[@]}" 
do 
if !(sudo screen -list | grep -q $i) 
then 
eval eval '$'$i 
echo "$i is now running" 
fi 
done 
;;

*) 
echo "Usage: /etc/init.d/cams {start|stop|repair}" 
exit 1

;; 
esac