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I uploaded my video to YouTube and the highest available playback resolution is 360p. This is much lower than what I uploaded. I believe that YouTube isn't making higher resolutions available for my video because of its aspect ratio. The video is 720x400.

How can I convert my video to a different aspect ratio without losing any of the picture or picture quality? I don't care if blank space appears around the video so long as the picture doesn't get stretched horizontally or vertically.

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Operating system? – Daniel Beck Jan 1 '11 at 21:26
I'm using OSX but I can also use Windows and Linux. – tony_sid Jan 1 '11 at 21:27
up vote 2 down vote accepted

Try ffmpeg:

ffmpeg -i mymovie.mpg -ar 22050 -acodec libmp3lame -ab 32K -r 25 -s 320x240 -vcodec flv mytarget.flv

ffmpeg has also option i.e.: -aspect 16:9

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