ffmpeg -f concat -safe 0 -r 1/4 -i file_mp4 -f mp4 $(date +%Y%m%d)_output_$(date +%H%M%S).mp4 cat file_mp4 file ‘a0.jpg’ file ‘a1.jpg’ file ‘a2.jpg’ file ‘a3.jpg’ file ‘a4.jpg’ file ‘a5.jpg’ file ‘a6.jpg’ ffmpeg -f concat -safe 0 -i file_mp3 -c copy $(date +%Y%m%d)_output_$(date +%H%M%S).mp3 cat file_mp3 file ‘ff_capture.mp3’ file ‘ff_capture.mp3’