Quote:
Originally Posted by mustardman
I have searched wider, and there is a tool to rotate MJPEG losslessly, and there also seem to be a few tools that claim to rotate MP4 video losslessly (VideoGo, Video Cutter). However, it seems exceedingly unclear whether this process simply changes the way the video is displayed by the player (setting a 'display' flag in the stream), or actually rotating the video data in the stream itself.
Personally, I suspect the former. Rotating MJPEG is really a step up from rotating a single JPG image, but rotating a stream with any sort of past/future frame references would be hard.
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There is a non-standard flag (not well respected) for rotating video in MP4 but there is no way to rotate H.264 video losslessly. I am assuming H.264/AVC is what is inside your MP4?