We've proven that the performance decrease is caused by the use of dualhead.  
In windows with the same card in my friend's computer i believe it blacks out 
and may turn off the second head while playing video in the first or games in 
the first.  I'm not entirely sure about that though, i've only seen it a 
couple times.   Anyway, is anyone getting better results with a video player 
in a dualhead setup? 


On Sunday 22 July 2001 13:07, you wrote:
> On Sunday 22 July 2001 12:29, Mathew Kanner wrote:
> > On Jul 22, safemode wrote:
> > > Just compiled the latest avifile-0.6 from cvs and noticed that i'm now
> > > only getting 16MB/s max video throughput and the video image looks
> > > crappy and it skips now.   I am using this on a dualhead now and before
> > > it was single. Could this be because avifile uses qt2.2.x and not qt3.x
> > > which is xinerama aware?   The card is a 32MB ddr G450 and i'm using
> > > the HAL module with the desktops at 16bpp.     I'm pretty sure it has
> > > something to do with xinerama and dualhead but perhaps someone else
> > > using dualhead doesn't have these issues and it's something entirely
> > > different.
> >
> >     Can you turn xinerama/dual-head off and find out for sure?
> >
> >     --Mat
>
> It is only with xinerama.   in single head mode, i get 63MB/s.  In dualhead
> with no other windows open, i get 25MB/s   with all the normal windows i
> have open, 17MB/s.   doesn't matter if it's texture video mode or not.
>

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