[FFmpeg-user] Change fps to an avi video without reencoding with ffmpeg

[phate89]

I have an avi xvid file at 23.976 fps and i need to change it to 25 fps
without reencoding... it is possible (vdub does it) because the framerate
it's only a value of the avi container... I found in ffmpeg the "-r"
function and i try to use it in this way:
ffmpeg -i input.avi -vcodec copy -an -r 25 "output.avi"

But the output still has the old framerate... Can i do it in some way with
ffmpeg?

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