[mythtv-users] What do I have to do to get HD working?

[Joe Votour]

--- Steven Adeff <adeffs.mythtv at gmail.com> wrote:

> On 4/15/06, Ivan Kowalenko
> <ivan.kowalenko at gmail.com> wrote:
> > On Apr 15, 2006, at 01.52, Steven Adeff wrote:
> > > On 4/15/06, Marco Nelissen <marcone at xs4all.nl>
> wrote:
> > >>>>> Whoever said that a P4 3.2 is fast enough
> for HD doesn't know what
> > >>>>> they are talking about.  Get an AMD dual
> core.  I have a 3800
> > >>>>> and it
> > >>>>> works well (It replaced a Prescott 3.2 that
> I used before after
> > >>>>> making
> > >>>>> the same mistake that you just made).
> > >>>>
> > >>>> Processor-envy aside, a dual-core 3800+ is
> overkill. I'm using an
> > >>>> Athlon64 3200+, and it is sufficient for HD,
> even without XvMC.
> > >>>
> > >>> It is only sufficient if you reduce the
> quality of playback.  A
> > >>> 3200+
> > >>> will not be able to deinterlace to 60fps. 
> This may not be important
> > >>> to everyone, but it is quite noticeable on
> sports, Letterman, etc.
> > >>
> > >> I suppose if your TV only supports progressive,
> you might need a
> > >> beefier
> > >> CPU. I just play my recordings in their native
> formats, since the TV
> > >> supports both interlaced and progressive input
> signals.
> > >
> > > I don't understand that commend about a 3200+
> not being able to
> > > deinterlace 60fps. I had Myth converting 1080i
> to 720p output before
> > > the new nvidia driver was released and never had
> a problem.
> >
> > I think we're talking about going from 1080i to
> 1080p (though this
> > hasn't been explicitly stated, as far as I'm
> aware) in real-time.
> > Probably would help, though, if we knew for sure.
> 
> I've got a 3200+ and use BOB with 1080i and still
> only hit 90%
> occasionaly.  The downside is the CPU needed to
> record from 3 DVB
> cards can make it choppy, just means I need to build
> a dedicated
> masterbackend, but I can definitely go from 1080i to
> 1080p with a
> 3200+.
> 
> --
> Steve
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> 


Steve,

Your recent messages have made a light bulb go off in
my head.  I admit, I haven't played with HD for too
long, so I'm always looking to learn some new tricks.

You mentioned that you play the recordings in their
native mode, how exactly do you do that?  I take it
that you have modelines for 720p and 1080i, and you
use XRandR (via the MythTV configuration under
Appearance/Separate video modes for GUI and TV
playback) to do that?  If that's the case, I'll be
making a 1080i modeline to see if that helps. 
(Currently, I think I'm playing everything back in
720p).

But, does that mean that you use any deinterlacing at
all?  I suspect not, if you're running the TV
interlaced.

Hmmm...  I need to be able to deinterlace my SD
recordings, but if I can get by without deinterlacing
my (interlaced) HD recordings and have MythTV
automatically recognise that, it would work well.

-- Joe

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