[MPlayer-dev-eng] [PATCH] New video filter: deblendlogo

[Oswald Buddenhagen]

On Wed, Feb 23, 2005 at 11:15:14PM +0200, Oded Shimon wrote:
> Does anyone know th _REAL_ YUV <-> RGB convertion equations?... They
> are NOT what is written in DOCS/tech/colorspaces.txt
> 
recently i used these formulas:

#define Kr 0.2126
#define Kb 0.0722

#define L(r,g,b) (Kr * r + Kb * b + (1 - Kr - Kb) * g)
#define YU(r,g,b) \
        (((int)(219*L(r,g,b)/255 + 16.5)) | \
         (((int)(112*(b - L(r,g,b))/((1-Kb)*255) + 128.5)) << 8))
#define YV(r,g,b) \
        (((int)(219*L(r,g,b)/255 + 16.5)) | \
         (((int)(112*(r - L(r,g,b))/((1-Kr)*255) + 128.5)) << 8))
#define YUY2(r,g,b) (YU(r,g,b) | (YV(r,g,b) << 16))

which will probably result in one of the number sets mentioned in the
file. i've got this from some directshow docu on msdn ...

-- 
Chaos, panic, and disorder - my work here is done.