Speed for different wrappers

[drmih]

I've always been quit happy to use dvd2avi followed by VFAPIconv before using CCE, but I've read a number of posts about the speed advantage of using avisynth (virtualdub?) and wonder if somebody who has used both methods could quantify the difference.

[wmansir]

The differnce is because Vfapi converts the colorspace from YUV->RGB and then it has to be converted back when encoding. Avisynth keeps it in YUV, so you end up with 10-15% speed increase, with no effect on quality.

You can get a further 10% increase if you use the simple resize plugin for avisynth. However, this will affect quality slightly.

EDIT: corrected 'compressed back' to 'converted back'

[drmih]

Thanks for that. I've just compared the time for a 0.5 Gb file using the standard method (dvd2avi/vfapi/cce2.62) and one where I followed the avisynth instructions (although the method I followed required me to use cce2.50 [in dvd2avi I created the .d2v as a YUV then used a script with avisynth and mpeg2dec). However, at best it only seemed like 2 to 3% speed increase which isn't really worth the bother. Is there a specific way to get the 10 to 15% increase?

[wmansir]

I can't think of any special steps you have to take. Perhaps there is a bottle neck somewhere else in your setup. You should give the simple resize plugin a try and see what kind of speed you get.