[mythtv-users] Can't get XvMC compiled in MythTV

[MythTV]

My dual CPU utilization is about 80-90% while displaying HD content.   
Sometimes the CPUs can't keep up with certain primetime shows like  
CSI.  Therefore, I thought I should install XvMC.  It took me days to  
get my environment setup so I could compile MythTV with ./configure -- 
enable-xvmc.  And when I finally do run the first 'make install' it  
runs for about an hour and ends with something like "/etc/X11/ 
extensions/XvMC" can't be found.  (Sorry, I didn't keep the exact  
error message.)

So I set off to find the XvMC libraries and install them on my  
computer.  I tried:
# yum -y install libXvMC  --It said there was nothing to install.
and
# yum -y install libXvMC-devel  --It installed but didn't install any  
libraries into the X11 directory.

Following: http://www.mythtv.org/wiki/index.php/XvMC.  I tried:
# apt-get install libxvmc-dev
and
# apt-get install libxv-dev
But apt-get just complained that these packages did not exist.  Does  
the Wiki need to be updated?  Or is it just my machine?

http://www.mythtv.org/wiki/index.php/XvMC also suggested that XvMC  
was installed with the NVIDIA driver install.  I so installed  
1.0-9755.  Of course, there still is no X11 extensions folder nor  
XvMC to be found in any libraries.

I reran the compile again with ./configure --enable-xvmc and this  
time, the "make install" takes just a minute.  Is this typical that a  
first install takes an hour and the subsequent installs take a minute?

Although the second install ran without the "X11/extensions/XvMC"  
error message, my CPU utilization is still 80-90% when viewing HD  
shows.  Can anyone tell me:
* Where can I get the XvMC libraries?
* How do I install the XvMC libraries?
* Can I confirm the installation because the extensions directory  
will be in the X11 directory?  Are there specific files to look for?
* Is there any other kind of environment setup required to get XvMC  
compiled into MythTV?

Rob Stokes
My configuration is:
MythTV version: 0.20.20060828-3.
Installed in December 2006 on Fedora Core 6 following Jerod's guide.
Kernel version: 2.6.20-1.2944.fc6.i686
CPU: Intel Pentium 4 CPU 3.2GHz Socket 775 800 FSB w/Hyper Threading  
Technology
Memory: 1Gig DDR 333 Memory 180 Pin
Motherboard: ASRock 775i65G Mother Board
Optical Drive: LG 18X DVD RW + Dual Layer
Hard Drive: 2 Western Digital 250GB 7200RPM 8MB Cache Serial ATA in a  
LVD 450 Gig volume
Video onboard: Integrated SiS Ultra256 2D/3D Graphics
Video card: Micro-star International (MSI) AGP GeForce FX5200- 
TD128LF, 8X, 128M, DDR1, D-Sub, DVI-D, TV-out
Audio onboard: AUDIO ADI AD1888 6-channel audio CODEC
Audio card: Riviera C-Media CMI 8738 (Connected to my entertainment  
center via the optical cable)
Network Card: Onboard 10/100 Network Card
Tuner card: pcHDTV HD-5500