Hello,

I have got some little Videos shot verticaly with a Digicam and I am trying to turn them without any loss by recompression.

The Videos are in mjpeg (mov) format, no Sound. I could convert them into a series of jpegs with ffmpeg. Then I turned all the jpegs by 90 degree using a little tool doing this without loss.

But I can't manage the last step, putting these series of jpegs back into a mjpeg video with ffmpeg. I can encode a mjpeg, of course, but the jpegs allways get recompressed. I could not find any setting to avoid recompression, but I think there must be a possibility, since it worked perfectly in the other direction. I thought the mjpeg format was nothing else than a file containing a series of jpegs and some meta information, like the playback framerate?

Any ideas?