[MPlayer-dev-eng] Re: CVS: main/DOCS/tech libavc-options.txt,1.26,1.27

[Michael Niedermayer]

Hi

On Wednesday 01 January 2003 16:41, Rémi Guyomarch wrote:
> In case you didn't noticed, Michael committed lots and lots of things
> in libavcodec recently : qpel, bframes+4mv fixes, better bframes ME,
> user-selectable ME compare functions, diamond size selection and a
> bunch of other things. Let me say a huge THANK YOU !! to Michael,
> libavcodec is starting to be simply the best mpeg4 encoder around ! :)
:)))))))))))))))))))))

>
> On Sat, Dec 28, 2002 at 01:23:30AM +0100, Michael Niedermayer CVS wrote:
> ...
>
> > +qpel	use quarter pel motion compensation
> > +	Tip: this seems only usefull for high bitrate encodings
> > +
>
> In my own tests, qpel seems to help a lot in terms of PSNR & average
> quantizer even at moderate bitrates (700-800 kbits/s). 
a music video at 400kbit which i used for testing looked like shit with qpel 
(& 0.23 PSNR loss) ...

> It eats a huge
> number of cycles though :)
yes, its pure c, no mmx, so its not too surprising

Michael