polynomialspace

# Glues 4 files into one

ffmpeg -i 1xtra.wav.mp4 -i radio1.wav.mp4 -i radio2.wav.mp4 -i radio4.wav.mp4 -filter_complex "
		nullsrc=size=640x480 [base];
		[0:v] setpts=PTS-STARTPTS, scale=320x240 [upperleft];
		[1:v] setpts=PTS-STARTPTS, scale=320x240 [upperright];
		[2:v] setpts=PTS-STARTPTS, scale=320x240 [lowerleft];
		[3:v] setpts=PTS-STARTPTS, scale=320x240 [lowerright];
		[base][upperleft] overlay=shortest=1 [tmp1];
		[tmp1][upperright] overlay=shortest=1:x=320 [tmp2];