Le Lundi 8 Janvier 2007 21:08, Laurent Pinchart a écrit :
> Hi Jose,
>
> > Hi Martin Rubli and others!
> >
> > First, let me thank you for the work done so far in the driver!
>
> As the project leader, let me thank you :-)
>
> > The thing is that I am trying to disable the camera auto gain.
> > I have read some previous threads that treated this same topic, but
> > haven't succeeded so far. I applied the patch that Martin Rubli made
> > available. I then compliled and installed. Later, I compiled the
> > "bayer.c" file.
> >
> > I am using a Logitech Ultra Vision camera and opencv and works pretty ok,
> > but when I run the bayer program I get:
> >
> > sudo ./bayer /dev/video0 0
> > Device /dev/video0 opened: USB Video Class device.
> > Enabling color pipeline ...
> > ERROR: Unable to set device control: -1
> >
> > From what I understand, the idea is to change the camera behaviour in
> > run-time, isn't it? I mean, I can tell the camera to stop doing
> > auto-adjustments (gain, shutter, whatever) anytime. Can this be achieved?
>
> That's right. The Quickcam Ultra Vision might have slightly different
> controls. I have no such model here, so I can't test the patch. Maybe
> Martin could have a look.
>
> Martin, by the way, is it necessary to put the webcam in bayer mode to
> disable the auto-exposure ? Or would the auto-exposure mode control do the
> job alone ?
>
> Cheers,
>
> Laurent Pinchart
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I just upload a new revision of luvcview with pan/tilt fix, a lot of
improvements. Seem strange that we cannot change the exposure in manuel
mode ? Is there a way to set/reset the autowhite balance too ? a lot of
robotic project need these features
Cheers
--
Michel Xhaard
http://mxhaard.free.fr
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