[mythtv-users] 1080i HD without XvMC, how much horsepower?

[Steven Adeff]

On 10/5/06, Neil Dunbar <neil.dunbar at pobox.com> wrote:
> On Wednesday 04 October 2006 16:42, Steven Adeff wrote:
> > On 10/4/06, Neil Dunbar <neil.dunbar at pobox.com> wrote:
>
> > > By and large the 6150 board does the trick. I don't have HDTV, and
> > > except for interlacing artifacts which Onefield largely gets rid of, I
> > > don't have any complaints. Just Bob seems to drive the load so high.
> >
> > What is the output hz for your video mode. I believe Bob also requires
> > an even multiple of the source (ie 30fps=30hz or 60hz), which may make
> > X(the video drivers really) go schizo.
>
> Hmm. It should be 50Hz, but modeline was:
>
> ModeLine "720x576"      16.25   720  780  900 1040      576  600  615  6
> 25 -hsync -vsync interlace
>
> Since then, I ended up just saying "Sod it" and leaving it to the nvidia auto
> select, which chose a 1024x768 resolution (with no interlace), and it
> delivers a much better picture! So I turned off interlacing, and all is still
> well (actually, it's a *really* nice picture!). That's what I get for
> assuming that I'm smarter than the GPU.
>
> However, when I (eventually) need to go to HDTV, I suspect that this creature
> will rear its head again.

Good to hear you got it fixed, will make recommending mATX boards all
the easier =) Try using "720x576" without a defined Modeline, iirc,
the driver should pick the best modeline options for the output you
define (so for TV-out, something NTSC compat). Or try a PAL modeline
from
http://www.mythtv.org/wiki/index.php/Modeline_Database#PAL_625

As for HDTV, depends on the TV and if it's EDID information is good or
not. With the Mits my friend just purchased I plugged my mythfrontend
into it and was able to use the "built-in" nvidia modes for HD and
they work perfectly. My old Sanyo 1080i CRT did not afford this
luxery.

-- 
Steve
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