[mythtv-users] VDPAU Brightness or Gamma Settings

Kirk Bocek t004 at kbocek.com
Wed Feb 17 17:57:50 UTC 2010

Andre Newman wrote:
> Have you checked for the vdpaustudio setting in custom filters in the vdpau profile?
> If your display can only do TV (studio) video levels then blacks will look crushed, maybe that why you think you need to adjust brightness & contrast or gamma?
> If your display can do full range maybe you will get a better result with vdpaustudio removed.
> With digital signals all the way from the tv station or movie studio to your display (HDMI or DVI) adjusting brightness or contrast in the video card will only degrade the picture quality, the display should be calibrated to the correct settings. Of course it's important that the software is processing the signals correctly. The default is now vdpaucolorspace=auto,vdpaustudio for the vdpau filters in the profile, this should give correct settings for a TV standard display, removing vdpaustudio may work better with some computer displays but it isn't the correct levels.  
> Andre

I am unfamiliar with these filters. Are they documented somewhere? A search on
the wiki for vdpaustudio didn't return anything.

The custom filters field in the VDPAU setup screen was empty. Should it
contain something?

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