[mythtv-users] My HDTV woes

Steven Adeff adeffs.mythtv at gmail.com
Sun Apr 2 22:43:05 UTC 2006


On 4/2/06, John P Poet <jppoet at gmail.com> wrote:
> On 4/2/06, Mark Lehrer <mark at knm.org> wrote:
> > So, here's some info on my setup:
> >
> > > Pentium 4 3.00GHz w/ hyperthreading (64bit chip, but 32bit install)
> > > 1GB RAM
> >
> > This chip is nowhere near powerful enough to do HDTV.  Intel, in
> > general, is pretty worthless.  I recommend getting an Athlon x2 3800 -
> > that is the first chip I had that could do HDTV properly (my
> > definition of properly is playing back 1080i content with 2x
> > deinterlacing & at 1280x720).
>
>
> Huh?  I have successfully displayed both 1080i and 720p HD material
> with a 2.8GHz HT P4.  Never used XvMC, however, just Xv.
>
>
> > I tried a 3.2 GHz P4 and an Athlon 3500+ before, and neither was good
> > enough.
> >
> >
> > > When I tune to an HD channel, it display, and the picture is great, but it
> > > stutters BADLY. The mythfrontend log shows:
> >
> > Are you able to do it without Myth?  For example, can you grab a transport
> > stream and play it back with VLC or mplayer?
> >
> >
> > > I KNOW 3Ghz w/hyperthreading & XVMC should be able to handle HD.
> >
> > Not correct about the CPU.  Are you sure that your card can do XvMC?
>
> 3GHz is plenty, but you should try it with Xv, and *not* XvMC.  Also
> make sure you are running nVidia driver version 7676, and nothing
> newer.
>
> Also, nvidia's interlaced output has been broken for a long time.  You
> are better off using a 540p mode.  If you have the 540p mode setup
> properly, and use BOB deint, then your TV will likely do "the right
> thing".  Actually, since you say you have a plasma, is the native mode
> really 1080i?  I though most plasmas where 1280x720p native?  You
> should feed your TV whatever it's native display mode is.

all plasma's are 720p *native* (or some weird resolution that can do
no better than 720p).

--
Steve


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