[Mplayer-advusers] some cinepak and video driver bugs

Fredrik Kuivinen freku045 at student.liu.se
Sun Mar 24 01:04:42 CET 2002


On Sat, Mar 23, 2002 at 10:29:56PM +0100, Arpi wrote:
> Hi,
> 
> > 	I always get confused on the meanings, though. I'm assuming U=Cb
> > and V=Cr. Are we on the same page there?
> 
> hmm. you gave a really very good idea!
> i've searched the net, and all documents matching what you say:
> U = Cb = Blue-Luminance
> V = Cr = Red-Luminance
> 
> So, by disabling one of U or V, we can verify libvo drivers and codecs!
> 
> Now, the last question: do we agree on that plane 1 is U and plane 2 is V ?
>

Doesn't that depend on the format? For example YV12 is, according to
http://www.webartz.com/fourcc/fccyuv.htm#YV12, V then U and I420 is
U then V.

Or I am missing something?

/ Fredrik




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