[mythtv-users] please explain XvMC

[Brian Stults]

Chris Wieringa wrote:
> Yep, X video Motion Compensation is a feature that can be enabled on some
> cards (Nvidia mainly, but some ATI cards have support for it AFAIK) to do MPEG2
> decoding.  Usually this is used with playing DVDs, however, the Hauppauge
> PVR-x50 cards capture streams in MPEG2.  Therefore, decoding of these streams
> are done on the video card with little impact on the CPU.  If you are using a
> an analog bttv capture card, you will not be capturing your streams in MPEG2,
> so there is no point in compiling in XvMC.
> 

I thought the PVR-x50's do their own decoding, so their wouldn't be any 
need for the video card to do any decoding.


-- 
Brian J. Stults
Assistant Professor
Center for Studies in Criminology and Law
University of Florida
phone: (352) 392-1025 x207    fax: (352) 392-5065