[mythtv-users] Any hope for 1080i content at 1080i with nVidia?

Seth Daniel mythtv.org at sethdaniel.org
Mon Aug 27 18:27:47 UTC 2007

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 mode 
> 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 good 
> as it would look with the driver working correctly and no de-interlacing at 
> all, but very good.  By the way...someone on avsform.com noticed that the 
> 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 set 
> 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 as 30 
> if the output is interlaced, which is what that patch changes in order to 
> 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.

seth / @sethdaniel.org
Hofstadter's Law:
It always takes longer than you expect, even when you take
Hofstadter's Law into account.

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