[XviD-devel] gmc problem - who to blame? version 2.0

[Robert Swain]

So to start with we have 2 people for whom it does not decode properly in
either xvid's vfw or ffdshow and 1 for just ffdshow.

I can add my observations to the former category and another (Hikke) in
#xvid on irc.freenode.net can himself to the latter category.

He has posted a link to a screenshot of the problem.
http://hikke.mine.nu/prob2.png

Thanks.

----- Original Message ----- 
From: "Christoph Lampert" <chl at math.uni-bonn.de>
To: "Radek Czyz" <radoslaw at syskin.cjb.net>; <xvid-devel at xvid.org>
Sent: Friday, August 08, 2003 5:41 PM
Subject: Re: [XviD-devel] gmc problem - who to blame? version 2.0


>
>
> Okay, this time it's 2 bframes and Quarterpel, right?
> Quarterpel+GMC is not tested enough, that's for sure.
>
> After some updating I can play the files, but XviD as well as FFmpeg show
> artefacts of motion at the top. That's bad, because then I don't know what
> the problem is.
> Anyway, I'll check, thanks for the clip.
>
> gruel
>
> P.S. Can you reproduce this with only 1  bframe? Without bframes?
> >From what I "see" I would guess, it shoulnd't matter, but who knows.
> Can you reproduce without QPel? I would say, no, but please test.
>
>
> On Sat, 9 Aug 2003, Radek Czyz wrote:
>
> > Hi :)
> >
> > Unfortunately, I have new examples of gmc not being decoded correctly
> > on libavcodec. I just finished watching my newest encode and I saw
> > this problem several times - it usually only applies to several
> > macroblocks and happens in high motion.
> >
> > This is the only good examples I found:
> > http://homepages.ihug.com.au/~syskin/prob2.avi
> > http://homepages.ihug.com.au/~syskin/prob3.avi
> >
> > I can give you more, but it's usually very elusive, mostly because of
> > high motion. It not always appears to be coming from the edges but
> > maybe it does.
> >
> > Unfortunately I can't compile ffdshow with some debug GMC output and
> > compare against xvid's decoder :/
> >
> > Regards,
> > Radek
> >
> > PS. I'm talking to Edouard, he says he's having problems both using
> > xvid and libavcodec (first clip). I promise that my vfw devapi4 xvid
> > build decodes both clips correctly. Bizzare.
> >
> > _______________________________________________
> > XviD-devel mailing list
> > XviD-devel at xvid.org
> > http://list.xvid.org/mailman/listinfo/xvid-devel
> >
> >
>
>
> _______________________________________________
> XviD-devel mailing list
> XviD-devel at xvid.org
> http://list.xvid.org/mailman/listinfo/xvid-devel
>


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