RGB/YUV color trouble

[Atax]

Hi all,

I read in a magazine, that all codecs work on the YUV-colorsystem-basis, and that when working with RGB-files that these files would have to be converted into the YUV-system, after wards they are compressed, and then converted back again into RGB (only if the source was RGB of course), and this is supposed to have a adverse color-effect on the finale AVI.

So my questions are:
1. How can I find out using Nandub/VirtualDubMod what color-model my source files have.
2. How can I do a clean RGB->YUV conversion before encoding?
3. Are DVD-Rips in general RGB or YUV?


Other issue:
I only know how to open 1 file at a time with VirtualDubMod, how can I open all the files (the entire movie) that DVD-Decrypter has created. (Problem: If I would start encoding, I would only encode about 30min of a movie, instead of the entire movie).


Thanks in advance

Atax

[Belgabor]

Please search around in the forum for the RGB/YUV issue, thats been coverend a myriad times. Just one small hint: Almost all DVDs and all MPEG4 codecs are neither, they are YV12.
To work directly with vdubmod you need to rip the whole movie to one vob, otherwise you need avisynth.