[MPlayer-users] lavc vs. xvid (and improving lavc quality)

[Matthias Wieser]

Michael Niedermayer wrote:

> Hi
>
> On Saturday 05 June 2004 23:20, Matthias Wieser wrote:
> [...]
>
> > High motion scenes (with higher quantizer) with sky tend to produce
> > block artifacts at the sky. It's understandable because the sky has
> > nearly no detail but nevertheless it would need just a bit more
> > bitrate than what mencoder allocates for the sky. If you use
> > postprocessing the sky looks OK (a bit like blue plastic - with some
> > noise it looks even better).
> >
> > IMHO there should be a possibility to tell mencoder or lavc "don't
> > spend nearly all bits on those fast moving objects (nobody will see
> > those details anyway) but reserve slightly more bits for seemingly
> > simple flat areas like sky, streets, walls and so on. (Xvid mode ?)
> > That would make mencoder/ lavc more tolerant to people that don't /
> > can't use postprocessing.
>
> no u dont understand it, the blocking artefacts where even there at
> qp=2,

Why? With quantizer=2 I have never seen any block artefacts.

> thats the lowest lavc or xvid will use by default, so neither of 
> them could give these blocks more bits

>
> anyway the problem may be fixed already, the only video with blocking

I'm using CVS mencoder+lavc from 040502.