[mythtv-users] HDTV playback & GF4

John P. Poet john at BlueSkyTours.com
Thu Mar 4 14:33:43 EST 2004

On Fri, 20 Feb 2004, Doug Larrick wrote:

> Kent Williams wrote:
> > I was wondering how much of a benefit the Geforce 4 MX is for HDTV
> > playback?
> > My Frontend is a HT p4 2.8ghz with a Geforce 2 (using the Nvidia
> > drivers) and it can't seem to playback any HDTV channels correctly.
> >
> > The backend has two nova dvb-t cards and the hdds are dma enabled. It
> > also happens on HDTV shows I have recorded previously and am just
> > playing back.
> > The network is 100Mbps full duplex and doesn't appear to be a problem.
> > The CPU usage on the frontend is sitting up close to 100% (96% +).
> >
> > If I went out and bought a GeForce 4 MX, is the CPU usage likely to drop
> > significantly?
> What version of Myth?
> What's your current video card?  Does it support the XVideo extension?
> You might also try compiling Myth yourself, adding the '-mpentium4'
> compiler flag to the libs/libavcodec settings.pro file -- I found this
> helped a lot.
> -Doug

That does help a lot.  Thanks Doug.

BTW, it seems the easiest way to do this, is to have the main configure
script do it.  For example:

./configure --extra-cflags="-march=pentium4"


More information about the mythtv-users mailing list