[MPlayer-users] DivX/XviD qpel decoding

[Michael Niedermayer]

Hi

On Tuesday 14 October 2003 23:49, Jakub Misak wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
>
> Ivan Kalvachev wrote:
> > Unfortunalty the green smearing bug is not lavc one, but in both divx4/5
> > and xvid bug. It comes from the incaccurte DCT that they are using. That
> > DCT comes from libmpeg2, and is not good enough for mpeg4 standart, but
> > is used becouse of its good speed.
> > To workaround it use the same idct in lavc with this option:
> > mplayer -lavdopt idct=4
>
> No, it's not the green smearing bug. It's something different.
>
> As I already explained in my first post, I tried the various -lavdopts,
> but they don't help. I also described the distortion (the waves, archs,
> curves, bends, whatever) in my two previous posts and also in the txt
> file (with from-to in seconds) and the PNG screenshot (with the
> highlighted area), I also uploaded a short AVI file. The files are still
> at mplayerhq.hu/MPlayer/incoming/DivX51-Qpel*
hmm, for me idct=4 also helps, but maybe we speak about different artifacts

[...]
-- 
Michael
level[i]= get_vlc(); i+=get_vlc();		(violates patent EP0266049)
median(mv[y-1][x], mv[y][x-1], mv[y+1][x+1]);	(violates patent #5,905,535)
buf[i]= qp - buf[i-1];				(violates patent #?)
for more examples, see http://mplayerhq.hu/~michael/patent.html
stop it, see http://petition.eurolinux.org & http://petition.ffii.org/eubsa/en