[mythtv-users] S-video & widescreen - both in and out
ivor at ivor.org
Fri Apr 1 09:42:14 UTC 2005
> I don't think you can.
> from :
> "It’s a common misconception that there are more pixels in a recorded
> 16:9 SD image than a 4:3 one because in reality all PAL D:1 images are
> actually 720x576 pixels, it’s just that a true 16:9 image is
> anamorphically squeezed into 720x576 pixels…"
> So a TV signal (again, AFAIK) only contains 720x576 pixels.
> A widescreen TV signal has the same number of pixels but each pixel is a
> different shape (in fact, for anamorphic, they're not even the same
> shape as each other - I *think* anamorphic is not relevant here)
> So (again AFAIK) there's no point in messing about with resolutions -
> the card will essentially scale to 720x576 anyway.
> This all changes for 16:9 projector (and probably 16:9 plasma/lcd
> screens and HDTV) where there are a different number of pixels.
> My projector actually has 856x480 (square) pixels (the US is a big
> market so I get stuck with NTSC height <sigh>) so in my case the
> applications can just scale the video and it all looks fine!
> (This is just by way of giving you a decent argument to give to the wife
> to buy a projector <grin>)
Same here. Actually I find I get a much higher video quality by
outputting 720x576 and letting the Plasma do the scaling instead. It
seems the scaling algorithms in my video chipset (VIA) aren't a match
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