[XviD-devel] VBV-RC and API

[Christoph Lampert]

On Sun, 9 May 2004, Christoph Lampert wrote:
> 
> Nope, it's still not fully working... I guess I'll have to run a few more 
> tests.

Ah, I get it... the problem could be how overflow measured: As difference 
between target bytes and actual bytes so far. That's okay to meet total 
size, but fails to work for VBV. There, the problem is to not exceed a 
maximal bitrate/framesizes too much during a much shorter time, i.e. until 
buffer runs empty then. 

So, currently, VBV is violated if e.g. total number of bits is too low so 
far, then a difficult scene starts and still framesizes are scaled _up_ 
(to meet total size) instead of _down_ or not at all (to fit into VBV buffer).

I'll see if I can come up with anything. 

gruel