I'm trying to use ffmpeg to create a cropped "boomerang" video. Where it would take in a video, take a small segment, crop it and then play that little piece forward and then play it backwards.
ffmpeg -y -i x.mp4 -c:v libx264 -filter_complex 'trim=start=1.32:duration=0.4,crop=500:500:1200:300,split=2[f][ri];[ri]reverse[r];[f][r]concat' x1.mp4
The end result, however, is
00:00:02.34 long, almost the exact same as the original
00:00:02.46. What am I doing wrong?