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I want to use ubuntu and preferably standard packages such as ffmpeg to rotate a 3gp video by 90 degrees in any direction. Preferably a command line or python script.

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I found that ffmpeg was able to do this. See, e.g. Ubuntu forums: rotate video 90 degrees – Simon Dec 15 '11 at 12:26
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by using VLC, you may rotate the video by going to Tools >> Preferences...

And select "All" for show settings. Then go to: Video >> Filters >> Rotate

After setting the degree you want, you can rotate by going to Tools > Effects and Filters > Video Effects > Geometry .. .

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the one I've tested is mp4 but I believe that VLC can support 3gp too. hope this helps. :)

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i can view the video rotated, but how do you make the change persist – justinhj Jun 6 '10 at 9:14
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up vote 2 down vote

Avidemux should be able to do this.

Do Video->Filters->Rotate(x degrees)->Close then File->Save->Save Video

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