DVD playback - Choppy?

[Shawn Coomey]

Thanks Carl-
I tend to agree with you, actually. I wonder if using GATOS ati.2 might
help. Of course, looks like they only have intel binaries...

Shawn



On Fri, 2002-04-05 at 00:22, Carl Potter wrote:
> Shawn,
> 
> FYI, DVDs runs smooth as glass for me as well in MacOS 9.x.  Apple's DVD player is
> either just doing a nicer software trick or their software is actually talking to
> whatever DVD optimizations exist in a Rage128.  All I'm saying is that motion
> compensation is very important as well as framerate, but motion compensation doesn't
> appear to be a part of Xine on G3s.
> 
> Carl
> 
> 
> Shawn Coomey wrote:
> 
> > Hmm.
> > Carl- Thanks for the info. There must be something going on that's funny
> > in Mac OS 9, then, as DVD's play so smoothly on my Lombard Powerbook in
> > 9.
> >
> > Mark- tried the direct rendering trick you mentioned, but playback
> > quality is the same (or worse) and trying to run glxinfo crashes X.
> > Maybe it's just mot meant to be. :)
> >
> > At least I got wireless access on the Powerbook working nicely!
> >
> > Mark- If you get your machine back up, could you post your XF86Config-4?
> >
> > Thanks!
> >
> > Shawn
> >
> > On Thu, 2002-04-04 at 03:48, Carl Potter wrote:
> > > I played around with DVD and did a lot of testing.
> > >
> > > machine:  iBook (toilet seat edition) 466MHz Rage128/DVD
> > >
> > > I don't think it really improved anything to have agpgart & DRI.
> > > Nor did /dev/rdvd seem to do anything really significant.  The most
> > > important factor seems to be Xv and the following:
> > >
> > > "motion compensation" is *apparently* only done on systems that
> > > have an Altivec processor (I read that somewhere in the code).  Whatever
> > > the case may be, motion compensation is NOT being done on G3s.
> > >
> > > I get better DVD playback on an Intel Celeron 400MHz with an
> > > ATI All-in-Wonder 4mb (oldie but a goodie) ......mainly because MMX-like
> > > optimizations are
> > > doing the motion compensation algorithm.  Apparently this algorithm
> > > does not do well using plain-jane CPU routines.
> > >
> > > I don't own a G4 so I don't know how much better DVD playback is.
> > > I'm curious to know if anyone can indeed report that motion compensation
> > > is being done on those systems.
> > >
> > >
> > >
> 
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