[mythtv-users] pcHDTV and HDTV

Tue Aug 26 16:01:55 EDT 2003

I must have bought the wrong DVI cable because I had all sorts of trouble
getting DVI out to work.  I got only green and blue out using a DVI-I cable.
I wasn't going to go out and get another $50 cable just to see if it worked
since I already had the transcoder.  But for crispness of display, I saw no
real difference between the two.

You can set an interlaced 1080i modeline in XFree86 and it will translate it
to 560 for you so I'm not sure what you mean there.

Here are my active modelines if anyone needs them.

Section "Monitor"
        Identifier      "Sony 34XBR800"
        HorizSync       28-75
        VertRefresh     50-72
#       Modeline "1080i"        74.25 1920 1960 2008 2200 1080 1090 1110
1125 +vsync -hsync interlace
        ModeLine "720p"         74.25 1280 1328 1384 1666 720 722 728 766
	  # nice widescreen gaming resolution
        Modeline "1000x600"     65.880 1000 1176 1216 1464 600 652 657
750 -hsync -vsync
        Modeline "540p"         40.806 960 1036 1116 1216 540 550 551 563
+hsync +vsync
        ModeLine "480p"         32.432 720 736 800 858 480 484 492 525
EndSection

Section "Screen"
        Identifier      "Radeon 7200"
        Device          "Generic Video Card"
        Monitor         "Sony 34XBR800"
        DefaultDepth    24
        SubSection "Display"
                # replaced all the defaults with custom timings
                #Modes          "1024x768" "800x600" "640x480"
                Depth           24
                Modes           "720p" "1000x600" "540p" "480p"
        EndSubSection
EndSection

I have commented out 1080i because I never use it/didn't like it.
If you use the "interlace" keyword it does the translation for you into 540.
+-xsync definately make a difference, and you should try making small
changes with xvidtune, but be very careful and only make small changes, if
you get some things to over/underscan better for you then take them and
apply them to your modeline settings.

Steele Price
CTO
Digital Dreamshop
http://xtcp.net

-----Original Message-----
From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org]On Behalf Of Brandon Beattie
Sent: Tuesday, August 26, 2003 2:43 PM
To: Discussion about mythtv
Subject: Re: [mythtv-users] pcHDTV and HDTV

Rule 1 for display device/resolution/(interlaced/progressive) is your
computer should be displaying whatever your true HDTV's native
resolution is.  Most devices are 720P for HDTV's.  Also, 1080i HDTV's
are often 1920x540, not 1920x1080.  There are several cards, mostly ATI,
that allow you to hook component video cables onto them.  If your HDTV
has a 15 D-Sub (VGA) connector just use that and any video card.  I know
of few HDTV's that only have component video connections.

--Brandon

On Tue, Aug 26, 2003 at 03:28:32PM -0500, Brian Foddy wrote:
> This is encouraging.  I've been waiting for a card like this for many
> months now.  Now that is available and a known commodity, I can start
> planning a machine around it.
>
> One question I haven't done much research on, not directly related to
> the card but never the less very important...
> What output options are there to drive from a graphics card to a HDTV
> using component cables?  My HDTV doesn't have DVI inputs, so I need
> either a card or converter with component outputs.  If its a native
> video card, then I assume it has to be running in the native
> 1920x1080 interlaced mode?  Etc, etc, etc.  Again, it may not
> be a big issue, I've just haven't done the research yet.
>
> Thanks,
> Brian
>
> On Tue, 26 Aug 2003, Brandon Beattie wrote:
>
> > I have a card, but I'm also the one who wrote the basic support so I'm
> > biast. ;-)  You can watch HDTV, change channels, seek backwards (Forward
> > may have a bug that I'm checking into).  The main problem we're facing
> > is you have to use an NTSC TV program guide for HDTV, and shows do not
> > always match from NTSC to ATSC/HDTV.  Once a grabtv for hdtv is written
> > to parse html on titantv.com and fill a myth database with information I
> > consider that most of the final goal.  Fixing bugs and handling no/poor
> > ATSC signals is another feature.  But it does work.
> >
> > For hardware, I don't like hardware decoding as you can't do video
> > overlay for OSD.  You will need about a 2.4Ghz+ system to be safe
> > (Although 1.8Ghz is enough to just play a HD stream).  If you use
> > hardware decoding a 1.2-1.4 ghz should be fine.  The performance needs
> > to be improved in MythTV.  Another issue at times (How myth does it's
> > scaling I believe).
> >
> > --Brandon
> >
> > On Mon, Aug 25, 2003 at 11:18:02PM -0700, Brandon Bremen wrote:
> > > The new pcHDTV came out just the other day as you guys probably saw. I
> > > read where mythTV got some preliminary support for it, and I am
> > > wondering how that is coming. Also, what hardware is need to output at
> > > HDTV resolutions? I've been lurking for a few days and noticed that
> > > Jarod has an HDTV. How is the performance? And has anyone had a chance
> > > to actually try the pcHDTV card?
> > >
> > > Thanks,
> > > Brandon
> > >
> >
> > > _______________________________________________
> > > mythtv-users mailing list
> > > mythtv-users at mythtv.org
> > > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> >
> >
>

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