[mythtv-users] Any hope for 1080i content at 1080i with nVidia?
digitalaudiorock at hotmail.com
Mon Aug 27 18:46:37 UTC 2007
>From: Seth Daniel
>On Fri, Aug 24, 2007 at 11:29:46AM -0400, Tom Dexter wrote:
> > For the time being, I've settled on using 1080i output (with a custom
> > line) and using Viktor's patch here:
> > http://svn.mythtv.org/trac/ticket/2903
> > ...to allow bob deinterlacing, and that made a huge difference...not as
> > as it would look with the driver working correctly and no de-interlacing
> > all, but very good. By the way...someone on avsform.com noticed that
> > line in that patch that reads:
> > if (mode_line.flags && 0x010) // #define V_INTERLACE 0x010
> > ...should actually be using s bitwise operator:
> > if (mode_line.flags & 0x010) // #define V_INTERLACE 0x010
> > ...otherwise it could it would be true if any flags at all happen to be
> > in those flags (though it didn't cause me any problems before I changed
> > that). I'm still baffled as to why mythtv reports a 60Hz refresh rate
> > if the output is interlaced, which is what that patch changes in order
> > allow use of bob.
>Wow. This actually seems to work. I use a custom 1080i modeline, add
>the patch linked above (with the change mentioned directly above), and
>1080i actually works and looks good.
>Thank you to Tom and to Viktor.
You're welcome!...but Viktor deserves the credit for finding this one.
Looks great doesn't it? After using it for a while I'm finding that my
original impression of it as being the next best thing to not having to
de-interlace at all, almost doesn't do it justice. I did an interesting
comparison the other night:
My mythfrontend is on a DVI switch box that lets me switch between it and my
old Samsung SIR-T351 HD tuner. During an NFL preseason game on NBC (1080i)
I tried switching between the two...the mythfrontend with bob de-interlacing
and the tuner which handles interlaced content properly. Fast moving sports
with all the panning etc at 1080i is a real acid test for this sort of
stuff. Honestly I could barely tell the difference. In a blind test I
might actually have picked the mythfrontend. 720p broadcasts actually are
better on my myth system than the Samsung receiver as it does a better job
of up-converting 720p->1080i than the Samsung (or my TV for that matter).
See what you’re getting into…before you go there
More information about the mythtv-users