[mythtv-users] Improving picture quality
Michael T. Dean
mtdean at thirdcontact.com
Sat Jan 14 18:50:05 UTC 2006
mike choy wrote:
> After much thinking
> I have come to realize that the trick to improve quality is to reduce
> the number of times the picture is scaled manipulated
> Lets assume that I have a PAL DVB picture of 704X576 50hz which is
> coming down my dvb capture card.
> I want to output to a digital display using DVI.
> Here are the number of times the picture gets scaled.
> 1.MythTV scales the picture according to the parameters in its playback
> -aspect ration overide
> -GUI/TV size
> 2.xv scales the picture to the org.conf display resolution
> 3. The nvidia driver does some internal scaling
> 4. The digital display device scales to the device parameters
> My current strategy is to set the Myth and Xorg resolutions to be the
> same as my display device
> there by all the scaling that goes on before the display is only done by
> a factor of 1.
> have I got this right?
If you're using Xv, Myth uses Xv to do the scaling because software
scaling is too slow. So, I think steps 1 and 2 are really only 1 step.
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