setting colour depth with xvid with auto GK

[dsb]

so...
probably a dumb newbie question but....
i've been using auto GK to encode to xvid -results look very nice too.
only thing is, the resulting file is 12 bit colour.
is this a characteristic of xvid or is there some option i should be tweaking... or a limitation of auto GK ?

[Soulhunter]

Nope. all* MPEG codecs work only in YV12 (12bit) colorspace...

* except some hq-studio-profile ones


- DVD (MPEG2) has 12bit colors

- VCD (MPEG1) has 12bit colors

- DivX (MPEG4) has 12bit colors


Bye

[dsb]

ok - thanks.
reason i asked - i create a divx file using autogk,once finished i right click, select properties and it claims to be 24 bit colour.
i do the same for the xvid and it says 12 bit.
other xvids i've downloaded claim 24 bit.
or am i missing something really obvious....
thanks!

[Soulhunter]

No, that some sort of misleading info, or even call it a bug !!!

That happens when you use VDub's full-processing mode...


While fast-recompress mode the video stays all the time in YV12 (12bit) !!!

Simple... YV12 -> YV12


But with its full-processing mode it gets converted from YV12 to RGB24 and then back to YV12...

Bad... YV12 -> RGB24 -> YV12


The "color-depth" info is written between this into the AVI container IIRC !!!

So it saves simply the wrong color info...


Bye

[dsb]

aha - thanks.
i'll continue with xvid then - seems nicer looking to me.