[mythtv-users] XvMC on NVidia with Myth .20

Rich West Rich.West at wesmo.com
Thu Jan 4 15:08:14 UTC 2007

Billy Macdonald wrote:
> Hello,
>      For Christmas I bought myself my first HD tuner.  It's a USB
> tuner Hauppauge HVR 950.  I built a separate backend and have
> successfully configured it and have made a few test OTA recordings.
>      My frontend is a P4 1.6Ghz machine, so I definitely need XvMC for
> any hope.  I have the binary NVidia drivers, version 9631 installed
> and am currently running at a 1280x720 resolution.  I've had no luck
> trying to get XvMC to work in Myth.  I'm thinking next of trying the
> SVN versions, although I really don't want to mess with my backends. 
> Will I cause problems running the current SVN on the frontend but .20
> stock on the backends?
>    I just noticed the release-20-fixes in SVN.  I think I'll give that
> a shot.
> As to what I've tried so far:
> XvMC works in Xine.  If I do an strace of Xine, I see it load the
> libXvMCW wrapper, read the /etc/X11/XvMCConfig file, and then load the
> libXvMCNVIDIA_dyanmic.so.1 file.  In Xine I can play my new HD
> recordings without studder or any other problems, both 1080i or 720p. 
> So I'm fairly confident that the NVidia stuff is setup right.
> ./configure --enable-xvmc
> Set the options to Standard XvMC, tried with various and no
> deinterlacing options.
> strace shows mythfrontend loading the XvMCW wrapper, but never even
> attempts to read the XvMCConfig file or load the Nvidia library.  The
> OSD display is gray so it's using some sort of XvMC, just not NVidia's
> I don't think.
> ./configure --enable-xvmc --disable-xvmcw
> It shows that it's linking to XvMCNVIDIA in the make output, but when
> all is said and done, ldd of mythfrontend does not show it linked to
> the library.  strace fails to show any attempts to load the XvMCNVIDIA
> library.
> A bunch of other stuff has been tried too, but I had to stop messing
> around as my wife wanted to actually use the Myth box :)  But I was
> having fun tinkering.
>   I've tried various changes in nvidia-settings and xorg.conf, but
> since myth isn't even trying to use the driver, I don't think anything
> else really matters.
> And thanks for everything to all of you who do so much.  We love the
> MythTV.
> Billy

Interesting.. I tried out XvMC last night on my Myth 0.20 box with an
nVidia GeForce6200 with just SD video (I'm prepping for dealing with SD
& HD), and it didn't display the colors correctly (using blootube-wide,
the OSD during playback was black-n-white) and the picture got majorly
blocky.  I rolled back my changes and just left it without XvMC.

I'd be interested to know if you make any progress..


More information about the mythtv-users mailing list