<p>Reset timestamps after the trim, and disable audio.</p>
<p><code>ffmpeg -y -i x.mp4 -c:v libx264 -filter_complex 'trim=start=1.32:duration=0.4,setpts=PTS-STARTPTS,crop=500:500:1200:300,split=2[f][ri];[ri]reverse[r];[f][r]concat' -an x1.mp4</code></p>

CC BY-SA 4.0
2022-07-10T04:11:10.783Z
2022-07-10T04:11:10.783Z
Gyan
<p>I'm trying to use ffmpeg to create a cropped &quot;boomerang&quot; 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.</p>
<p><code>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</code></p>
<p>The end result, however, is <code>00:00:02.34</code> long, almost the exact same as the original <code>00:00:02.46</code>. What am I doing wrong?</p>

<ffmpeg>
Crop and boomerang at the same time using ffmpeg?
chx
# Crop and boomerang at the same time using ffmpeg?

(Asked by: username_0 on 2022-07-09)

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?

**Tags:** ffmpeg


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## 1 answers

### Answer by username_1 on 2022-07-10. Score: 1 | Accepted answer

Reset timestamps after the trim, and disable audio.

`ffmpeg -y -i x.mp4 -c:v libx264 -filter_complex 'trim=start=1.32:duration=0.4,setpts=PTS-STARTPTS,crop=500:500:1200:300,split=2[f][ri];[ri]reverse[r];[f][r]concat' -an x1.mp4`


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