how to rotate a movie?

[Bill McGonigle]

On Aug 30, 2007, at 12:56, VirginSnow at vfemail.net wrote:

> If you don't want to transcode the movie, but leave it alone, and  
> just rotate
> what what mplayer shows you:
>
>  $ mplayer silly.mov -vf rotate=1 # or rotate=2, depending on gravity

This would be the generally better solution, I think, as you won't  
suffer a generation loss and get MJPEG artifacts by re-coding.

Now, and this is really rusty, I think there's a way to read the JPEG  
DCT matrix and rotate a JPEG without recompressing, and mencoder  
_might_ know how to do that, but it would have to be special-cased.   
If anybody remembers what software could do that, and you could  
somehow split the .mov into its constituent JPEG frames and  
soundtrack, and then re-assemble them... well, major geek points and  
probably unwarranted for a home movie.  :)

The QuickTime container is an open standard and the basis for MPEG-4,  
so there are probably decent QuickTime manipulation tools out there.

-Bill

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