ffmpeg -f concat -safe 0 -r 1/4 -i file -f mp4 output.mp4 file file 'a0.jpg' file 'a1.jpg' file 'a2.jpg' file 'a3.jpg' file 'a4.jpg' file 'a5.jpg' file 'a6.jpg' ffmpeg -f concat -i file -c copy ff_merge_audio.mp3 file file 'ff_capture.mp3' file 'ff_capture.mp3'