[MPlayer-dev-eng] [PATCH] synch to new x264 revision

Guillaume POIRIER guillaume.poirier at ifsic.univ-rennes1.fr
Sat Sep 25 21:24:52 CEST 2004


Hi,
Le jeu 23/09/2004 à 23:36, Loren Merritt a écrit :
> Also, in both H.264 and MPEG4, it seems to help global PSNR to use 
> slightly lower quantizers on I-frames than on P. This may cause a visible 
> jump in quality at low bitrates, if the I-frame is in the middle of a 
> low-motion scene.

Is that what p_mask is supposed to do (That's maybe a dumb question, let
me just say that I'm not sure if my understanding of intra and inter
blocks is correct)?
On ffmpeg ML, you wrote:
> p_mask: increases the quality of intra blocks.
> (Which is equivalent to reducing quality of inter blocks, once you
> take rate control into account.)
> p_mask=1.0 doubles the bits allocated to each intra block.

Regards,
Guillaume
-- 
Boycott meat -- suck your thumb.




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