[mythtv-users] Help with xorg.conf

Allan Wilson allanwilson at gmail.com
Thu Dec 22 13:49:36 EST 2005


I do have a VGA input on my TV but it will not take up the full screen if
you use it. Refering to what you where talking about Michael should I get a
cable to convert the VGA to something else? If so what input should I shoot
for? I do like the idea of using the VGA output anyhow b/c every computer
already comes with this. Even if I use the VGA out won't I still have to
tell it the specs for my Display with a modeline since it is not standard?

Steve, I have seen where some people are using different resolutions for
different content but how do you control this? Also if you are using Myth in
on a widescreen display what do you use for the theme. Thanks for the help I
think I am starting to understand a little better.

Allan

On 12/22/05, Steve Adeff <adeffs at gmail.com> wrote:
>
> On Thursday 22 December 2005 12:20, Michael T. Dean wrote:
> > Allan Wilson wrote:
> > > Thanks Michael, that was just a flub I meant 1080p.
> >
> > Yeah.  I was just mentioning the name of the standard so you and Steve
> > were on the same page when I said that your TV /is/ a 1080p--as you
> > claimed.
> >
> > > I know I shouldn't use the svideo out but it's what I've got now and I
> > > am going to be adding a new box that will use a better connection.
> > > Right now I mainly want to get my desktop and myth full screen on my
> > > 16:9 screen. I haven't played with linux at all on a 16:9 screen can
> > > someone give me some pointers I am suffering from to much info I
> > > think. Like how do I find my HorizSync or my VertRefresh. What
> > > modeline are you using and what lead you to using it? Thanks for the
> help
> >
> > Just connect a VGA cable.  Any video card should have one, and you'll
> > get much better picture quality as a bonus (even at 640x480, the PQ will
> > be better than a PVR-350's S-Video out--but you might as well go to a
> > higher resolution).  Since your TV (and all other 1080p TV's I've seen)
> > doesn't support 1080p60 via DVI, you'll want to use VGA in your final
> > 1080p configuration, anyway, so you might as well start moving that way.
> >
> > IMHO, you're just wasting time trying to get widescreen support with
> > S-Video/Composite (which are designed for 4:3 NTSC--especially in the
> > NVIDIA drivers).  Since your final setup will be using VGA, you might as
> > well go there now--even if you don't do 1080p--because it's easier to
> > configure.
> >
> > However, if you really want to use S-Video, you can make it work by
> > selecting the appropriate "scaling" mode on your TV (i.e. send a 4:3
> > signal and make your TV stretch it).
> >
> > Mike
>
> If your TV is 1080p then its best native mode will be 1080p. Unless your
> TV
> has a Faroudja scaler, and possibly even if it does, you'll want to run
> your
> video card output at 1920x1080 and have MythTV, etc, output at this
> resolution.
>
> Some caveats:
> Some TV's have native modes for SD at 480p which if any of your SD signals
> are
> noisy you might want to have Myth output at these lower native resolutions
> since scaling can make the picture look really bad.
>
> For things like DVD's, digital cable sources (even if run through a PVR
> card's
> S-Video), and of course HD material, go ahead and have Myth/MPlayer/Xine
> scale them to 1920x1080. The software scaling will be as good if not
> better
> than the internal scaler on your TV, and since these sources will be
> realitvely free of signal noise(with the PVR material being the worst,
> even
> when its clean) scaling to 1080p will definitely be the way to go.
>
> As of now, I don't think MythTV has an IVTC algorithm for playing back HD
> sources though, so it will be interesting to see how the standard
> deinterlace
> algorithms handle HD stream output of 1080i material into 1080p.
>
> When playing back DVD's with MPlayer or Xine, give a try using their IVTC
> filter. The one to use with MPlayer is "-vf pullup,softskip", I'll gander
> Xine has a similar one, though I haven't played around with Xine in a
> while.
> This should, in realtime do the best inverse-telecine for outputting to a
> progressive display. Worth a try.
>
> --
> Steve
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