Really nice. > The corresponding command-line arguments are pretty gnarly: ffmpeg -i input.mp4 -i overlay.png -filter_complex "[0]trim=start_frame=10:end_

Really nice. > The corresponding command-line arguments are pretty gnarly: ffmpeg -i input.mp4 -i overlay.png -filter_complex "[0]trim=start_frame=10:end_frame=20[v0];\ [0]trim=start_frame=30:end_frame=40[v1];[v0][v1]concat=n=2[v2];[1]hflip[v3];\ [v2][v3]overlay=eof_action=repeat[v4];[v4]drawbox=50:50:120:120:red:t=5[v5]"\ -map [v5] output.mp4 I have actually written scripts that would generate such horrors but north of 2000 characters :]. > If you're like me and find Python to be powerful and readable, it's easier with ffmpeg-python: import ffmpeg in_file = ffmpeg.input('input.mp4') overlay_file = ffmpeg.input('overlay.png') ( ffmpeg .concat( in_file.trim(start_frame=10, end_frame=20), in_file.trim(start_frame=30, end_frame=40), ) .overlay(overlay_file.hflip()) .drawbox(50, 50, 120, 120, color='red', thickness=5) .output('out.mp4') .run() )