[MPlayer-users] Hue/contrast adjustment/luminance histogram/etc. using mplayer

[Joseph N. Hall]

I have a few (more) questions.

* Under my version of mplayer (some recent 0.9), the hue
  controls don't work.  I am using an ATI AIW card with the
  gatos drivers - works great in general. (mplayer, xawtv 
  etc.)

* Is there any software hue/color adjustment in general 
  filter in mplayer/mencoder?  In 0.9?  That would sure be
  handy.

* How can I get a histogram of the luminance values in a
  frame or sequence of frames?  I would like to know if my
  blacks are black and my whites are white, among other things.
  I can do something like

    mplayer -vo png [...some snippet of video...]

  and then look at the images with Gimp.  But I wonder, after
  conversion to RGB, is the luminance exactly the same?
  Nevermind that this is a pain.

* I would like to be able to adjust luminance values with
  curves a la Photoshop, or something easier and more flexible
  than gamma/contrast/brightness anyway.  I wish there were a
  way to specify an 8-bit lookup table, or values to 
  interpolate a table from ....

Thanks.  I will assimilate responses into my "Fun of Ripping
Laserdiscs" doc as time permits so that the knowledge will
be preserved and disseminated.  (Hopefully.)

  -joseph