change in brightness

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change in brightness

Post by gungner » Sat Feb 11, 2006 4:18 pm


Two of my four cameras are getting darker and darker during the day and then they get back to normal brightness when it gets dark outsude. Before the update to 1.22 it was only one camera and I thought it was a problem with the camera, but now when I get it on two cameras I wonder.

For a sample please have a look at

Anything to tweek on zma?

cheers, tord[/url]

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Post by mlrtime3 » Sat Feb 11, 2006 11:34 pm

Mine doesn't get that dark but I have basically the same problem. The brightness seems to change randomly during the day and it causes the alert to trigger.

I don't know if this is an issue with the camera because I've never seen it with the analog out but I'm not sure.

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Post by zoneminder » Tue Feb 21, 2006 5:41 pm

I'm sorry I don't have the link but someone posted a brightness control script (try the User Contribs forum) which was for a different purpose but which might help.

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Post by jameswilson » Tue Feb 21, 2006 5:55 pm

usually this indicates a problem with the lens or ei circiut on the camera. To confirm run an internal camera through zm or a normal video source such as tv to test
James Wilson

Disclaimer: The above is pure theory and may work on a good day with the wind behind it. etc etc.

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Post by gungner » Wed Feb 22, 2006 7:15 pm

Thanks for the information. I found the script at : ... brightness

and will give it a try. Thanks


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