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elalemanyo/Create a mosaic out of several input videos

Last active September 13, 2017 10:31
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Create a mosaic out of several input videos
// Video mosaic
ffmpeg
-i 1.mp4 -i 2.mp4 -i 3.mp4 -i 4.mp4
-filter_complex "
nullsrc=size=1280x720 [base];
[0:v] setpts=PTS-STARTPTS, scale=640x360 [upperleft];
[1:v] setpts=PTS-STARTPTS, scale=640x360 [upperright];
[2:v] setpts=PTS-STARTPTS, scale=640x360 [lowerleft];
[3:v] setpts=PTS-STARTPTS, scale=640x360 [lowerright];
[base][upperleft] overlay=shortest=1 [tmp1];
[tmp1][upperright] overlay=shortest=1:x=640 [tmp2];
[tmp2][lowerleft] overlay=shortest=1:y=360 [tmp3];
[tmp3][lowerright] overlay=shortest=1:x=640:y=360
"
-c:v libx264 output.mp4
// Video mute audio
ffmpeg -i output.mp4 -vcodec copy -an output_mute.mp4
// Get merge audio
ffmpeg -i 1.mp4 -i 2.mp4 -i 3.mp4 -i 4.mp4 -filter_complex amix=inputs=4:duration=first:dropout_transition=4 output_sound.mp3
// Merge audio with video
ffmpeg -i output_mute.mp4 -i output_sound.mp3 -vcodec copy -shortest output_complete.mp4
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