DVD playback - Choppy?

[Shawn Coomey]

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.
> 
> 
> 
> Shawn Coomey wrote:
> 
> > Thanks Mark-
> > You may be on to something.
> > I have Xv enabled and /dev/rdvd for playback.
> >
> > However, I don't know if direct rendering is set up for the Rage128. My
> > guess is that this is probably the culprit.
> >
> > Any idea how to enable this?
> >
> > Thanks!
> >
> > Shawn
> >
> > On Thu, 2002-04-04 at 00:51, mpople@orbeng.com wrote:
> > > Hi,
> > > A few things that vastly improved my xine performance was to make sure i was
> > > using Xv video driver and i set up my /dev/rdvd for playback and also i
> > > enable direct rendering for my Rage128.
> > > hope this helps
> > > Mark
> > >
> 
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