Avisynth: Source Conversion?

[MrTibs]

For various reasons, I sometimes want to run my Huffy source through an AVS script and out to a Huffy file again. My question is: what program is the best program to use to do this kind of conversion?

Does Vdub convert the colour space to RGB and back to YUY when I use it?

What other program could I use that doesn't do the RGB conversion?

[Boulder]

If you use direct stream copy or fast recompress mode in VDub, it doesn't do the RGB conversion. You can't use any VDub filters, but if you only want to save the AVI, this is the way to go.

[MrTibs]

Thanks. That is just what I wanted to here. I don't need Vdub filters since Avisynth provides more than enough.