[cpia] Creative webcam II

[John Coppens]

On Sun, 31 Aug 2003 01:23:49 -0300
John Coppens <john@jcoppens.com> wrote:

> Hi all.
> 
> First thanks for the CPiA driver - it works great. 
> 
> I got myself a simple parallel version of this camera, and I plan to use
> it on board of a balloon experiment we're doing with my students at the
> university. First I wanted to test it on my Linux machine, and got it
> working in no time with the CPiA driver. A few problems:
> 
> 1) I have the impression that when I used 'webcam' (the program that
> comes with xawtv) the camera remains in video mode, causing a few
> problems:
> 
>    - The images are sent in update mode - only the differences are sent,
> and parts of the image that don't change are not updated. This get
> particularly bad if some part of the image is damaged for some reason
> (This happens frequently switching from xawtv to webcam).
> 
>    - The AGC and other controls do not work that well - it takes several
> pictures to 'stabilize'. Probably same cause. Is there some way around
> this?

Point 1) solved: Disabled compression with cpia-control. I was convinced
that compression referred to some kind of jpeg compression, but reading
the datasheet, found that is was this which caused the problems.

> 2) After a few hours, something went wrong and the camera blacked out.
> Everything was working, just no image. I slowly tried to modify all
> parameters with cpia-control, and when I disabled/enabled the banding
> filter, the image reappeared.
> 
> 3) The controller is a VV0760P002, anyone knows what the difference is
> with the P001 of the datasheet available?
> 
> Thanks in advance!
> 
> John
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