[MPlayer-dev-eng] Re: Should I write Voodoo Banshee VIDIX driver?

[Tobias Diedrich]

Georgi Petrov wrote:

> YUV is created from RGB by this way:
[...]

Have a look at DOCS/tech/colorspaces.txt

> Then comes this 4:2:2 or 4:2:0 thing.
> 
> I understand it so: RGB is 4:4:4, because converted to YUV it uses 4 bits
> (bits?) for each Y, U and V part. Then U and V can be "cut", so the YV12 format
> uses 4:2:0. Is it 4 bytes or what and how V part becomes 0? As a whole, what's
> this 4:4:4, 4:2:2 (YUY2) and 4:2:0 (YV12). Ohhh, I'm lost...

That's described in DOCS/tech/colorspaces.txt too, as well as
packed/planar. :-)

-- 
Tobias						PGP: http://9ac7e0bc.2ya.com
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