fast recompress or full processing mode when encoding transport streams?

[fuxor123]

1. What is the exact difference between fast recompress and full processing mode in virtualdubmode?

2. When encoding HDTV sources i follow a guide that suggests me using fast recompress. Would i get any significant differences if i chose full processing mode like better quality or longer encoding times and so on?

[Guest]

Fast recompress can operate without color space conversions, while full processing always converts to RGB internally to allow filtering.

If you don't need filtering, then fast recompress is preferable.

[fuxor123]

Well I encode using this:

Loadplugin("D:\AVIsynth 2.5\plugins\mpeg2dec3.dll")
Loadplugin("D:\AVIsynth 2.5\plugins\decomb521.dll")
Loadplugin("D:\AVIsynth 2.5\plugins\simpleresize.dll")
Loadplugin("D:\AVIsynth 2.5\plugins\undot.dll")
mpeg2source("D:\your_project.d2v")
Telecide(order=1,guide=1,post=2,vthresh=30)
Decimate()
crop(8,6,-8,-10)
UnDot()
simpleresize(1280,720)

So I guess full processing mode wouldn't return better quality, right?

[Guest]

Correct.

[Zep]

Well I encode using this:

Loadplugin("D:\AVIsynth 2.5\plugins\mpeg2dec3.dll")
Loadplugin("D:\AVIsynth 2.5\plugins\decomb521.dll")
Loadplugin("D:\AVIsynth 2.5\plugins\simpleresize.dll")
Loadplugin("D:\AVIsynth 2.5\plugins\undot.dll")
mpeg2source("D:\your_project.d2v")
Telecide(order=1,guide=1,post=2,vthresh=30)
Decimate()
crop(8,6,-8,-10)
UnDot()
simpleresize(1280,720)

So I guess full processing mode wouldn't return better quality, right?

if you have no filters added in Vdub then Vdub will default to
Fast recompress internally even though the menu says full proccessing.
(At least in 1.5.10 which is still what I use)