[MPlayer-users] Red Pixels and ATI+DELL

[Guillaume POIRIER]

Hi,

On 3/11/07, Raeez <rlorgat at webafrica.org.za> wrote:
> On Sunday 11 March 2007 11:02:40 Guillaume POIRIER wrote:
> > Hi,
> >
> > On 3/10/07, Raeez <rlorgat at webafrica.org.za> wrote:
> > > Hi, Im on Kubuntu 6.10 edgy eft and I have both the distro version and
> > > the svn (I update daily) version of mplayer which I have built. I notice
> > > the following problem regardless of which i use (i only really use the
> > > svn version though).
> > >
> > > Picture quality is good, except for when I come across a deep red area in
> > > the picture. All reddish colours especially deep red are extremely blocky
> > > with large pixels whilst the rest of the picture is fine. I have only
> > > found this with 4CC encoded files (xvid, divx etc.)
> >
> > It's normal, it's a compression artifact, as well as a colorspace issue.
> >
> > Guillaume
>
> I would understand that, but then how do you explain that under windows the
> same file is rendered without this artifact, and why only the colour red? Is
> this a limitation of mplayer? or ffmpeg? The media player I use under windows
> is Media Player Classic along with ffdshow.

I'd suppose that on Windows, the decoder does some kind of
post-processing that reduces the visual impact of these artifacts.

MPlayer can also post-process, but you have to do it manually.

Look for deblocking and de-ringging post-processing/video filters in
the  documentation.

Guillaume