Video wall script using gstreamer

videowall.sh

#!/bin/bash
#
# Basic gstreamer quad video wall viewer
# Displays 4 videos. 
WIDTH=640
HEIGHT=480
((HW=WIDTH/2))
((HH=HEIGHT/2))

# SRC0="uridecodebin uri=rtsp://user:[email protected]/Stream1"
# SRC3="uridecodebin uri=rtsp://user:[email protected]/Stream1"
# SRC1="uridecodebin uri=rtsp://user:[email protected]/Stream1"
# SRC2="uridecodebin uri=rtsp://user:[email protected]/Stream1"
SRC0="videotestsrc is-live=true pattern=1"
SRC1="videotestsrc is-live=true pattern=11"
SRC2="videotestsrc is-live=true pattern=18"
SRC3="videotestsrc is-live=true pattern=0"
SINK="videoscale ! video/x-raw,width=$WIDTH,height=$HEIGHT ! xvimagesink sync=true"

gst-launch-1.0 compositor name=mix  \
  sink_0::xpos=0   sink_0::ypos=0   sink_0::width=$HW sink_0::height=$HH \
  sink_1::xpos=$HW sink_1::ypos=0   sink_1::width=$HW sink_1::height=$HH \
  sink_2::xpos=0   sink_2::ypos=$HH sink_2::width=$HW sink_2::height=$HH \
  sink_3::xpos=$HW sink_3::ypos=$HH sink_3::width=$HW sink_3::height=$HH \
  ! $SINK \
  $SRC0 ! mix. \
  $SRC1 ! mix. \
  $SRC2 ! mix. \
  $SRC3 ! mix.