/usr/local/bin/ffmpeg -i http://192.168.98.197:4242/bysid/1130 \
       -i http://192.168.98.197:4242/bysid/1010 \
       -i http://192.168.98.197:4242/bysid/1013 \
       -i http://192.168.98.197:4242/bysid/1007 \
       -filter_complex "nullsrc=size=1280x240 [base]; \
       [0:v] setpts=PTS-STARTPTS, scale=320x240 [p11]; \
       [1:v] setpts=PTS-STARTPTS, scale=320x240 [p12]; \
       [2:v] setpts=PTS-STARTPTS, scale=320x240 [p13]; \
       [3:v] setpts=PTS-STARTPTS, scale=320x240 [p14]; \
       [base][p11] overlay=shortest=1 [tmp1]; \
       [tmp1][p12] overlay=shortest=1:x=320:y=0 [tmp2]; \
       [tmp2][p13] overlay=shortest=1:x=640:y=0 [tmp3]; \
       [tmp3][p14] overlay=shortest=1:x=960:y=0" \
	   -c:a aac -shortest \
       -c:v libx264 mosaic6.avi