[mythtv-users] Use Xv Picture Controls

[Mercury Morris]

On 7/12/06, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> On 07/12/06 13:06, Mercury Morris wrote:
>
> >The Frontend Setting, Use Xv Picture Controls, has disappeared.  It was there
> >
> > (Frontend->Utilities/Setup->Setup->TV Settings->
> > Playback->General Playback->General Playback(part 2))
> >
> >until I tried the 'F' key to adjust the Hue.
> >
> >After reading through the User, Dev, and Commit lists, where others had lost
> >the same setting, I updated my system with SVN from today (July 12, 2006).
> >But, the Use Xv Picture Controls setting didn't come back.
> >
> >One solution, recommended by several people, is to just use the 'F' key
> >and set the Hue for good faces, skin tone, etc.  I'm looking for an
> >alternative solution, so I can leave the Hue at 50%, instead of having
> >it pegged up over 90%, just to see non-blue faces.
> >
> >
>
> How can a circular control be pegged (i.e. hue wraps around, so the
> difference between 1% and 100% is only 1%).  Unfortunately, there's no
> standard meaning for, e.g. 90%, so some cards' drivers define 0% as the
> default value and others define 50% as the default and ...

Thanks for answering.

Hue may wrap around on other systems, but not on mine.  When the value
of zero(0) is reached, it changes to -1 and can no longer be adjusted.
 After that, it's blue faces forever.  So, I am quite reluctant to get
too close to 100, and that's why I used the term "pegged".

> You just need to set the value to the appropriate value for your card in
> your frontend.
>
> >Has anyone any idea how to get the Use Xv Picture Controls setting to
> >appear again?
>
> Use an old version of Myth...
>
> http://www.gossamer-threads.com/lists/mythtv/commits/205106#205106 says:
>
> This also gets rid of the "UseOutputPictureControls" option. I don't see
> any reason why you would ever want to disable picture attributes if your
> hardware supports it, and it does no harm to have them enabled if the
> hardware does not support them.
>
> In other words, they're always enabled.  Your use of the 'F' key to
> change playback picture controls proves this...  That's the way you
> access the Xv picture controls.
>
> >One person suggested deleting the following settings from the database:
> >
> > PlaybackBrightness
> > PlaybackContrast
> > PlaybackColour
> > PlaybackHue
> >
> >I'll try this step, but first I'd like to know if anyone else has tried this
> >and not suffered some catastrophic meltdown of the frontend.
> >
>
> All settings in Myth have default values (I think the default for Hue is
> 0), so you would just be going back to the Myth defaults--which may or
> may not be right for your video card.

Here's a bit more information, offered to support my wish that the
setting Use Xv Picture Controls would again be displayed:

The system is configured with dual heads - The TV set, where the blue
faces show up, and a small 15" monitor.  When the frontend is brought
up on the monitor, the pictures are "perfect".  "Perfect" meaning that
faces look the same being played back as they do watching the picture
directly Over-The-Air.

Obviously, MythTV playback is applying the Hue setting for the TV, but
not for the monitor.  I just want MythTV to stop applying the Hue
setting.  I made a mistake by touching the 'F' key, and now can't find
my way out of the MythTV doghouse.

Unfortunately, the TV set does not have a VGA input.  If it did, I
would just connect the VGA output of the FX5200 card to the VGA input,
and stop complaining.

Again, Thanks for taking the time to reply.

-- 
MM