Re: Webcams again

On Thursday 01 February 2007 12:56, Rick Sewill wrote:
On Thu, 2007-02-01 at 11:06 +0000, Anne Wilson wrote:
In the thread "webcam support/hardware compatibility list" Riick Sewell
wrote

The person at http://mxhaard.free.fr/ was very helpful in getting the
webcam to sort of work. Unfortunately, my knowledge of webcams and
color was so limited I could only help him to a point, and he had to
wait for more knowledgeable people to get this webcam to get the colors
even close to being correct.

Rick, can you give us some idea of what you had to do? It may give us a
clue for troubleshooting our own colour problems.

I wish I could give a good answer to this question.

The person at http://mxhaard.free.fr had a way to dump registers, from
the webcam. I sent him a message, with these registers. We were lucky
when he made a guess the webcam chip set was similar to a chip set the
driver supported.

He sent me an updated driver, he thought might be able to get an image.

I compiled the driver, from him, and ran a tool, he had on his website,
that showed what was being seen from the webcam. The tool could take a
picture.

I would take a picture and send the picture to him. He would look at
the picture and tell me what lines to change in the driver. I would
change those lines, take another picture, and send him the picture.

We would repeat the process as far as we were able.

He was able to get a picture. The colors in the picture were poor.

What he needed was a person who understood more about cameras and
lighting and color--all things I did not know.

I was a pair of hands. I got lost when he tried to explain the
different color things--YUV, parameters to try for red, green, blue,
gamma. I am not a camera buff. He was very patient with me.

He sounds a great guy. I'm using the atrpms version of gspcav1 driver, so I
can't bother him with this. OTOH, I'm not so sure now that it is a driver
issue, as I find that ekiga gives me much better colour than aMSN.
Reasonably accurate, certainly acceptable. What *may* be a driver issue,
though, is that the parameters I should be able to set in ekiga, kopete and
aMSN don't move at all.

Anne

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Relevant Pages

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