bash script ffmpeg rtsp monitor

camera-feed.sh

#!/bin/bash

ffmpeg -rtsp_transport tcp \
  -i 'rtsp://camera-1' \
  -i 'rtsp://camera-2' \
  -i 'rtsp://camera-3' \
  -filter_complex "
    color=s=1920x1080:c=black [base];
    [0:v] setpts=PTS-STARTPTS, scale=960x540 [upperleft];
    [1:v] setpts=PTS-STARTPTS, scale=960x540 [upperright];
    [2:v] setpts=PTS-STARTPTS, scale=960x540 [lowerleft];
    [base][upperleft] overlay=shortest=1 [tmp1];
    [tmp1][upperright] overlay=shortest=1:x=960 [tmp2];
    [tmp2][lowerleft] overlay=shortest=1:y=540
  " \
  -c:v libx264 -preset superfast -crf 18 -f matroska - | ffplay -fs -an -