Re: [Mjpeg-users] Novice needs help with bright washout

[<ra...@ja...>]

I've not been able to get xawtv to work.

[rray@rray1]$ xawtv -c /dev/video0
This is xawtv-3.92, running on Linux/i686 (2.6.5-1.326custom)
Warning: Cannot convert string "-*-ledfixed-medium-r-*--39-*-*-*-c-*-*-*"
to type FontStruct
X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  144 (GLX)
  Minor opcode of failed request:  5 (X_GLXMakeCurrent)
  Serial number of failed request:  327
  Current serial number in output stream:  327

[rray@rray1]$v4lctl -c /dev/video0 brightness 30000
no handler for brightness

Richard Ray


On Sun, 25 Apr 2004, Ronald S. Bultje wrote:

> Hi,
>
> On Sun, 2004-04-25 at 16:59, ra...@ja... wrote:
> > I'm a complete novice to video processing. I just bought a LML33.
> > I have the latest zoran driver.
> > I capture using "lavrec -fa -in -d2 -q100 -Rl -l100".
> > The recording is very good except that any bright white is too bright.
> > The picture is washed out.
> > Otherwise the picture is good.
> > I test playback with "lav2yuv test.avi | yuvplay".
> > I've played with yuvcorrect_tune but it's pretty much Greek.
> > How can I rebuce the brightness of very white scenes.
>
> You can also use xawtv (or its command-line application v4lctl) to
> change brightness, then you don't need to post-process the video after
> capturing.
>
> Ronald
>