[mythtv-users] playback color saturation

[Philip Baltar]

I've got an MX440 on Mythbuntu.  It sounds like I'm supposed to have XV
controls, but I don't know how to enable it.  I tried the Overlay option in
xorg.conf, but it said that it only works for Quattro cards.

On Sat, Mar 29, 2008 at 6:12 AM, Daniel Kristjansson <danielk at cuymedia.net>
wrote:

> On Fri, 2008-03-28 at 18:07 -0700, Philip Baltar wrote:
> > I've been trying to figure out how to fix the color during playback.
> > I've managed to figure out that my Nvidia card doesn't support XV
> > picture controls.  Messing with brightness/contrast/gamma wasn't
> > working very well.  I'm sure that if I sat here long enough, I could
> > get it to work.  But, I wanted to find out if there's a "saturation"
> > setting somewhere first.
> >
> > If I do have to work with brightness/contrast/gamma, some tips would
> > be nice.  I'm pretty much randomly moving sliders around until i get
> > something that looks close.
>
> nVidia cards after the 5xxx series dropped XVideo picture controls,
> but we can simulate some of the controls in the new experimental
> OpenGL video renderer. Brightness, contrast and gamma do not simulate
> "saturation". The closest would probably be gamma if you are stuck
> with those controls. Your best bet might be to locate the picture
> settings for your monitor and make the adjustments there. Newer
> displays often have a factory setting with the brightness turned
> up too high*, which washes out all the colors and compromises the
> blacks. Turn this down first, then play with the other sliders.
>
> --
> Daniel
>
> * There is a good economic reason for this. Most TV showrooms just
> unpack the displays and put them on display without adjustment, so
> TV manufacturers need to optimize the display settings for room
> bathed in copious florescent lighting.
>
> PS If you have a 5xxx or earlier nvidia card, you can enable picture
> controls by telling the driver to use overlay for XVideo in xorg.conf.
>
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