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Old 26th January 2015, 21:49   #5  |  Link
nevcairiel
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Join Date: Mar 2010
Location: Hamburg/Germany
Posts: 10,344
You can't rotate MP4 as such, you can only put a flag into the MP4 that tells the player to rotate the video during playback. However, as others have indicated before, its not that well supported.
MJPG might be the only codec where this works properly due to lossless jpeg rotation.
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