如何修复 MJPEG 文件中的 fps/持续时间信息

Question

I have a set of MJPEG.avi files which were logged as being at 25fps, but were actually recorded slightly slower than this, so they're timing is wrong (they show up as being about 2 minutes shorter than the actual recording). I know the true duration of recording - how can I set the duration of the file to that, without re-encoding?

Answer 1

You may use FFmpeg , using the same solution posted here .

The following two steps solution is without re-encoding:

• Convert from AVI to raw MJPEG:

   ffmpeg -i input.avi -c copy input.mjpeg

• Remux the raw MJPEG with new framerate (24 fps for example):

   ffmpeg -r 24 -i input.mjpeg -c copy output.avi

The above solution assumes there is no audio stream.