[XviD-devel] status of bframes?

[Christoph Lampert]

On Fri, 3 Jan 2003, Jim Hauxwell wrote:

> Hi,
> 
> I've been doing some tests with xvid_encraw / xvid_decraw.  Looks like all
> the bframes have corruption on them.  Before I start digging, is there any
> know problems with bframes?  I have attached the 100 frames I have
> encoded/decoding.

You mean distorsions at the snake's head? 
I guess this is because B-frames have quant 31 and the material is
interlaced!!!

What were your input parameters? 
Did you notice that you have to modify xvid_encraw.c a little, because 
it does not set bquant_offset (old version of API). Sorry for that, I was
busy for the last weeks and didn't follow the changes in API, and I don't
use xvid_encraw myself.

Maybe set this value to 0, next to line 281  

        xparam.bquant_ratio = ARG_BQUANTRATIO;
        xparam.bquant_offset=0;

and retry. 

gruel