[mythtv-users] Anyone getting good HD off a P4 3.2G or less without XVMC?

Nate Crosno ncrosno at ipass.com
Thu Jan 4 17:14:48 UTC 2007

That does help, and is encouraging. Thanks!  My specs are pretty similar
except the PCI Video card and single IDE hard drive.  The MB is what
came in an HP dc5000mt. I have 1.7GB of DDR400 RAM, and am also running
Gentoo and using .20 ebuild of Myth.  I have tried several variations in
the compile, but currently have the following in "packages.use"
 media-tv/mythtv mysql lirc dvb video_cards_nvidia nvidia xvmc dvd
opengl opengl-vsync ivtv

My tuner cards are an ATI HD Wonder and a PVR-150.

-----Original Message-----
From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Ali Asad Lotia
Sent: Thursday, January 04, 2007 8:08 AM
To: Discussion about mythtv
Subject: Re: [mythtv-users] XvMC on NVidia with Myth .20 (Anyone getting
good HD off a P4 3.2G or less without XVMC?)

I'm running on a p4 3.2 Ghz machine which is running Gentoo Linux and
I've installed Myth using the ebuilds. My machine specs are:

p4 3.2Ghz with hyperthreading enabled
Gigabyte P945 based motherboard
4 x SATA 300 HD.
Gigabyte GeForce 6600 PCI Express VGA
1 x PCHDTV 3000 PCI HD tuner card
1 x PVR-500 PCI SD tuner card

I have no problem playing back HD without XvMC enabled and this is a
combined frontend backend machine. I am currently not displaying at HD
resolutions since I don't (yet) have and HD display, but the machine
is decoding an HD stream.

Hope this helps.


On 1/4/07, Nate Crosno <ncrosno at ipass.com> wrote:
> I'm having the same issue -- xine works great with xvmc, but Myth does
> I've tried everything I can think of.  This is my last big hurdle.  It
> stinks that Myth is so finicky with xvmc while xine seems to work
easily for
> most people.  I'm very interested to hear if you have any luck.
> On a slightly different topic, is anyone getting good quality HD
> *without* XVMC on a P4 3.2 Ghz or less?  If so, do you have HT enabled
> disabled? (I've tried both). I thought this should have worked. I
think my
> limiting factor is the PCI video card, but that's all my MB has.  I
> the on-board video is AGP, but it's only VGA and I need DVI.  If I
> get XVMC to work in Myth and others report that this processor is
capable of
> HD, my other option is  a new MB and AGP video card and re-use the
rest of
> my hardware. A quick search on newegg shows I can do that for about
> Thanks,
> Nate
>  ________________________________
>  From: mythtv-users-bounces at mythtv.org
> [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Billy Macdonald
> Sent: Wednesday, January 03, 2007 11:31 PM
> To: mythtv-users at mythtv.org
> Subject: [mythtv-users] XvMC on NVidia with Myth .20
> Hello,
>      For Christmas I bought myself my first HD tuner.  It's a USB
> 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
> 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
> 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
> wrapper, read the /etc/X11/XvMCConfig file, and then load the
> libXvMCNVIDIA_dyanmic.so.1 file.  In Xine I can play my new HD
> without studder or any other problems, both 1080i or 720p.  So I'm
> confident that the NVidia stuff is setup right.
> ./configure --enable-xvmc
> Set the options to Standard XvMC, tried with various and no
> options.
> strace shows mythfrontend loading the XvMCW wrapper, but never even
> 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
> 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
> as my wife wanted to actually use the Myth box :)  But I was having
> tinkering.
>   I've tried various changes in nvidia-settings and xorg.conf, but
> myth isn't even trying to use the driver, I don't think anything else
> matters.
> And thanks for everything to all of you who do so much.  We love the
> Billy
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