fast motion

[rufsiany]

What is the a good/easiest way of creating fast motion with Avisynth? I have an 1 hour video of the office interior taken from the tripod and want to speed it up to e.g 20seconds. I can do it in VirtualDub: menu -> Video -> Frame Rate -> (Change frame rate to (fps): 10000. Convert to fps: 25). But I would rater do it entirely within avisynth script. AssumeFPS()? ChangeFPS()?, ConvertFPS()? Which one to use? The doc. is rather vague on their purposes.
Thanks
rufsiany

[linyx]

Say your source is 30 fps then AssumeFPS(60) would play it at 2x speed. So a few calculations should give you what you need.

[Blue_MiSfit]

Right. Then changeFPS to decimate it down to your final frame rate. (30?)

~MiSfit

[linyx]

@Blue_MiSfit
Good idea. Never thought to change the framerate down again.:stupid:

[PeaceAnt]

selectevery(100) gives you 100x speedup

pozdrawiam