[mythtv-users] Xv and XvMC - what's the difference?

[manu]

Le 08.01.2004 22:46:47, Emlyn.Bolton at nokia.com a écrit :
> Hi,
> 
> Could somebody enlighten me as to what Xv and XvMC are exactly, and
> whether my assumptions are accurate.
> 
> I assume that Xv provides some form of direct access to the screen  
> but
> I'm unsure of the specifics.
> 
> Thanks in advance!
>

Xv is an extension of the X server that allows to do hardware scaling  
(which frees the CPU a bit when displaying video). XvMC is another  
extension that uses hardware acceleration for decoding MPEG2 streams  
(actually it helps decoding using hardware, this frees even more CPU).  
Xv is supported by XFree for a lot of cards, but XvMC seems to be  
supported only by nVidia drivers for the GeForce4 IIRC.
Bye
Manu