user5999: I tried to solve this for quite some time now and could not find the solution. I would like to select a certain "subarea" of a video and rotate/flip only that "subarea". Like a combination of these two one liners:
ffmpeg -i IN.mov -filter:v "hflip,vflip" -c:a copy out.mov
ffmpeg -i IN.MOV -filter:v "crop=out_w:out_h:x:y" out.mp4

Thank you for any help. 

user1871: Use
 ffmpeg -i IN.MOV
        -filter_complex "[0]split=2[full][crop];
                         [crop]crop=W:H:X:Y,transpose=cclock[crop];
                         [full][crop]overlay='X+h/2-w/2':'Y+w/2-h/2'"   out.mp4

The video is split with one copy getting cropped and rotated. The other full copy remains full-sized. Then the edited portion is overlaid on the full portion.
The variables in capital letters should be replaced with your numerical values.

5999: <p>I tried to solve this for quite some time now and could not find the solution. I would like to select a certain "subarea" of a video and rotate/flip only that "subarea". Like a combination of these two one liners:</p>

<pre><code>ffmpeg -i IN.mov -filter:v "hflip,vflip" -c:a copy out.mov
ffmpeg -i IN.MOV -filter:v "crop=out_w:out_h:x:y" out.mp4
</code></pre>

<p>Thank you for any help. </p>
 1871: <p>Use</p>

<pre><code> ffmpeg -i IN.MOV
        -filter_complex "[0]split=2[full][crop];
                         [crop]crop=W:H:X:Y,transpose=cclock[crop];
                         [full][crop]overlay='X+h/2-w/2':'Y+w/2-h/2'"   out.mp4
</code></pre>

<p>The video is split with one copy getting cropped and rotated. The other full copy remains full-sized. Then the edited portion is overlaid on the full portion.</p>

<p>The variables in capital letters should be replaced with your numerical values.</p>
