[AG-DEV] Additional Grabber settings

[Jason Bell]

Doug

This sounds pretty good to me.

Cheers,
Jason.

-----Original Message-----
From: Douglas Kosovic [mailto:douglask at itee.uq.edu.au] 
Sent: Wednesday, 8 August 2007 12:01 PM
To: 'AG-DEV'
Subject: RE: [AG-DEV] Additional Grabber settings

Hi Todd,

> > The PWC driver seems to remember the V4L2 settings between changing
> > virtual venues (although the sliders in vic's V4L and V4L2 panels
> > don't reflect the actual values of the corresponding V4L/V4L2
control
until
> > the slider is actually moved).
> 
> 
> This is true as long as you don't go into the vic menu.  As soon as
you
> press the 'Menu' button on vic, the gamma/gain settings are reset to
those
of
> the gui sliders (off) so they need to be reset again.

Okay, it's not exactly satisfactory and will need to be fixed.

With the new version of vic in SVN, the X11 resources Vic.v4l2gamma and
Vic.v4l2gain can now be used (e.g. set them in ~/.Xdefaults). It's still
not
ideal, as the max and min gamma values vary with V4L2 drivers, so you'll
need to guess what a suitable value is.

To simplify things, I'll add C++ code to vic that scales gamma and gain
based on a value between 0 and 255. If I do that, I'll readily be able
to
add gamma and gain sliders to the node configuration of the Video and
VideoProducer services. 


Cheers,
Doug