Output YUV Data

[Entropy_Controller]

I read the following on one of the help pages

Output YUV Data as basic YCbCr not CCIR601: This changes the colour scale from 8-235 to 0-255.

If the source comes from DVD2AVI this box should be ticked and the colours should be set to TV scale in DVD2AVI. By doing it this way, any detail above 235 and below 8 will be kept. It is VERY important to do this when encoding test patterns for setting brightness and contrast levels.

Alternatively, the box can be unticked, and the color set to PC scale in DVD2AVI. With it set this way, detail below 8 and above 235 is lost forever.


I'll explain it in terms of black and white:

TVs are set so that 8 is the darkest black and 235 is the brightest white. When a standalone DVD player plays a DVD, the color
scale it outputs is 0-255, but the TV's brightness (black level) and contrast (white level) are adjusted so that any colour below 8 is seen as darkest black and any colour above 235 is the brightest white.
Realistically, most people set their TVs with a slightly greater range than this so that the picture has more detail.


PCs use 0 as the darkest black and 255 as the brightest white.
Some PC video cards do the same thing as a TV. They expand the 8-235 part of the scale to 0-255, killing anything below 8 and above 235. I know the GeForce 2 does this, but the i740 doesn't. The video cards are set like this so that black looks black and white looks white instead of them looking some shade of grey. But there are many DVDs that have picture information below 8 and above 235.

So i hope i've explained that ticking the "Output YUV Data as basic YCbCr not CCIR601" is better than not ticking it, but the source should also have the 0-255 colour range. DVDs and other MPEG2 can be decoded in DVD2AVI using the TV scale. - mikk

I am just wondering where in DVD2AVI you can choose this option TV Scale.

[Entropy_Controller]

Never mind, I found it.