[mythtv-users] 50Hz PAL over VGA at 60Hz (again) - how does Windows MCE do it?

[Nick Craig-Wood]

Ben Lancaster <lists at benlancaster.co.uk> wrote:
>  OK, so a while ago I started a discussion about how video playback  
>  wasn't as smooth as I'd expected with 50Hz PAL over VGA @ 60Hz (a  
>  limitation of my TV), and the answer was, as expected, because  
>  there's interpolation with duplicate frames to compensate for the  
>  addition 10 frames required. It's most noticeable when you get  
>  panning shots, or lots of movement, it's by no means a showstopper,  
>  but it's quite irritating.
> 
>  So my new question is this: how does Windows MCE do it? A friend of  
>  mine has the exact same TV (Samsung LE32... something-or-other), but  
>  he uses Windows MCE to play UK Freeview (i.e. 50Hz PAL) over VGA at  
>  60Hz, yet video playback on his is silky-smooth. What is MCE doing  
>  differently? And is there any way to replicate this on Linux?

What sort of de-interlacing are you using?  I speculate that it might
be an interaction between bob de-interlacing and the framerate.
Perhaps mythtv is only duplicating full frames?

Have you tried different de-interlacing modes to see if it makes a
difference to the motion?

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick