Slow Motion

[Mounir]

I wanna make an edit with twice the same video, the first part will be normal speed, the second slowed down.
The challenge here is to keep the normal speed rate (29.9 fps) for the whole project.

Thanks for your help

[ajk]

If you mean a simple slowdown (show each frame for twice as long), use ChangeFPS() (http://avisynth.org/mediawiki/ChangeFPS) and AssumeFPS. If you want some kind of intermediate frames, you need a suitable MVTools-script.

[TheSkiller]

AssumeFPS(FrameRate/2, true).SSRC(AudioRate)
ChangeFPS(FrameRate*2)


ajk said it already, this is how it looks.
This universal script snipped will slow down a clip to 50% keeping the original frame rate, it also slows down the audio, audio pitch is not preserved (voices sound very deep), audio sample rate stays the same as well.
The video is slowed down by duplicating every frame, if you need real new intermediate frames you can use for example InterFrame (http://forum.doom9.org/showthread.php?t=160226) instead of ChangeFPS().

[Mounir]

It worked fantastically well, thanks for the tips