[mythtv-users] Could someone just clarify a TV out question?

Jay R. Ashworth jra at baylink.com
Thu Oct 4 01:22:12 UTC 2007


On Wed, Oct 03, 2007 at 09:53:47AM -0700, David Brodbeck wrote:
> I don't think he's describing stuttering, but rather an interlacing  
> or frame rate issue.  Maybe he could clarify if there's actual  
> stuttering, or if he's seeing camera pans and news tickers sort of  
> slowing and speeding up instead of moving smoothly.  The latter is a  
> common symptom of the frame rate of the video and the frame rate of  
> the display not lining up.  I see it pretty routinely when playing  
> back DVDs (24 fps) on my PC's monitor (60 Hz).  There's no way to  
> evenly divide 24 into 60 so playback will never be perfectly smooth.

Sure there is.  It's called 3:2 pulldown.

I've *made* TV fairly regularly for over 20 years.  With my sister's
mythbox, with a -250 or -35o for capture and a Sapphire Radeon 9600XT
for TV out, I'm perfectly happy with the quality of the output picture,
in luminance, saturation, and temporal aspects.  I'm *quite* picky.

So it can be done.

I'll note that since we're using TV out and a video monitor, we don't
*have* to deinterlace, and as long as you're[1] not using a progressive
scan monitor, you[2] don't have to either -- and doing so will screw
things up.

Cheers,
-- jra
[1] the royal you
[2] this one, too
-- 
Jay R. Ashworth                   Baylink                      jra at baylink.com
Designer                     The Things I Think                       RFC 2100
Ashworth & Associates     http://baylink.pitas.com                     '87 e24
St Petersburg FL USA      http://photo.imageinc.us             +1 727 647 1274


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