How to get 23.976 fps from source at 25 fps

[cerncern]

Hi all, I would like to know if there is a method using avisynth to compress from a source pal at 25 fps to a final video in 23.976 fps.

Thanks

[IanB]

Assuming the stream is progressive :-AR=AudioRate()
AssumeFPS(23.976, True) # or AssumeFPS(24000, 1001, True)
ResampleAudio(AR)or if the 4% slowdown is a problem see MVFlowFPS from MVTools. A quicker but cruder approach would be to use ChangeFPS() or ConvertFPS().

If the stream is interlaced then converting to 23.976 really serves no purpose other than as an academic mind exercise.

[zee944]

I don't know what you want exactly as a result (DVD? DivX?), but the proper way is to flag the source to be 23.976 fps (it won't change the footage itself but it'll play 4% slower), and if you want to put it on DVD, then you have to telecine it to be 29.97i fps and flag as progressive. Assuming your source is progressive, of course. Don't even think about actually converting from 25 to 23.976i destroying the original frames.

[matrix]

Encode as it is, at 25 fps, just change resolution to ntsc, and use DGPulldown to set the flags to 29.97 or 23.976. This way, the audio will stay in sync.