[MPlayer-users] Re: Problem Encoding Solid Color Objects With LAVC MPEG4

[D Richard Felker III]

On Wed, Sep 24, 2003 at 03:04:43AM +0200, Michael Niedermayer wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> Hi
> 
> On Tuesday 23 September 2003 21:44, Angel wrote:
> > [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> >
> > Rich wrote:
> > > I agree. There are no blocking artifacts in either. Perhaps Angel was
> > > confusing them with some different sort of artifact -- just plain
> > > noise -- but as far as I can tell that has nothing to do with the
> > > encode but rather it's just noise in the source. Using the hqdn3d
> > > filter might help that.
> >
> > As I stated in my last post... the problem is far less noticeable on a
> > computer monitor (which I assume is how you viewed it). The problem I'm
> > talking about is the fact that the noisy background on the wall looks like
> > large blocks moving around in the lavc version. The divx / xvid version
> > does not do this. The source consists of a noisy background wall... that is
> > how it should look in the encoded version (especially with a bitrate of
> > 1500 and little to no motion). The lavc version makes the background look
> > noisy by shifting large solid color blocks around. This is VERY noticeable
> > on a T.V.
> try ibias=128:vfdct=2 and remove trell

Can you offer any explanation of why this does/should help? :)

Rich