ffmpeg 25 fps to 24 fps

Due to this issue with OCVWarp and frame sequences, needed to change the fps for a video from 25 fps to 24 fps.

We can do it with re-encoding using Avisynth, under 

Video -> Filters -> Transform -> Change FPS

 - useful if we want to change the codec -

or without re-encoding with ffmpeg with a command similar to the one in my earlier post,

ffmpeg -itsscale 0.834167501 -i input-25fps.mp4 -vcodec copy output-24fps.mp4