[mythtv-users] Processor Requirements for different HDTV formats?

Doug Larrick doug at ties.org
Wed Oct 20 10:33:58 UTC 2004

Joe Barnhart wrote:
> --- Doug Larrick <doug at ties.org> wrote:
>>Are you using a 1080i mode, or a 540p (1920x540)
>>mode?  Either way, the 
>>in-card scaling (from 720p) is not as good as it
>>could be, but I think 
>>it's a bit worse for 1080i -- I'm not actually
>>convinced the nVidia 
>>driver is doing interlaced output properly.
> I'm using a 1080i modeline.  Haven't tried the 540p
> line 'cuz I want every pixel I'm entitled to! ;-)  How
> much of the scaling is due to the nVidia driver, and
> how much is handled by XFree86 and myth?  If I were to
> get a different card would the scaling be better?

540p and 1080i are electrically equivalent to the set -- it's just a 
matter of whether 1080i content has deinterlacing applied to it (for 
540p) or whether 720p has interlacing applied to it (for 1080i).  Try it 
the other way (and turn on bob deinterlacing); you may be pleasantly 

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