AviSynth Slowing Down Clips?

[AFT]

I'm having a problem with my AviSynth scripts. I'm writing the scripts on AvsP, which was included in the AMVapp 3.0. I added this script and opened it in WMP:

AVIFileSource("C:\filename.avi")
dfttest(sigma=30)
LSFmod(strength=120)

When I watch the video, the filters work perfectly but the video is suddenly slowed down... there's nothing wrong with the audio, though. I tried only the script to open the file: AVIFileSource("C:\filename.avi") and that worked perfectly. I'm pretty new to avisynth and I have no clue what's going on here. Is there something wrong with my script? Or have I overlooked something really basic? Please, any advice is greatly appreciated.

[Zarxrax]

Are you trying to watch the avisynth script directly? Thats no good, because the processing you are doing on the script is obviously bogging down your processor, so it's impossible to play at full speed. In order to test the output at full speed you will need to encode it to something designed for playback.

[AFT]

Thanks, I wasn't sure whether it was a problem with the actual file or if it was a problem to display... Just finished compressing it with VirtualDub and it's all good now.
Another question however, that I decided wasn't worth making a thread about... Is it really necessary to rip my DVD's? I tried just copying the files off the DVD and it worked. Is there an advantage that ripping gives over simply copying the files off? Again, just a basic question since I'm still pretty much a newbie here.

[Zarxrax]

It depends on the DVD. Most DVDs have some sort of copy protection on them which prevents you from simply copying the files. There are a few (especially older anime dvds) which may not have any protection.

Also ripping gives you more control over which parts you copy, if you dont want the entire dvd.

[AFT]

Thanks! That's all I needed to know. Consider this topic resolved.