[XviD-devel] vop flag question

[Pascal Massimino]

	Hi,

On Tue, 2005-06-14 at 16:47, MAILER-DAEMON at edu.bnhof.de wrote:

> But looking and xvid_encraw.c example it doesn't use the 
> XVID_VOP_GREYSCALE flag when encoding greyscale images.
> Instead it divides the image and makes an RGB image.
> Is there a reason XVID_VOP_GREYSCALE is not used(there 
> is a bug to be worked out?), or is it just by choice?

	Just an omission. I've added a '-grey' option
	to xvid_encraw.c in cvs.

> 
> Also looking through the code I couldn't find an option for
> a 1-channel image so I'm feeding a 3-channel image.
> I use XVID_CSP_I420  and set Cb & Cr channel to 0.
> Is there a better option?
> 
> Finally I tested the XVID_VOP_GREYSCALE option by the two following 
> tests.
> The src images are a sequence of greyscale images using XVID_CSP_I420 
> option and setting Cb & Cr channel to 0. The image size is 1008x752.
> All options were the same for both encoding except for the
> XVID_VOP_GREYSCALE flag.

	hmm... try setting the Cb & Cr values to '127' instead.

-Skal