v4l2 software auto-brightness/contrast

Forum for questions and support relating to the 1.28.x releases only.
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basinilya
Posts: 11
Joined: Sat Jul 04, 2015 3:46 pm

v4l2 software auto-brightness/contrast

Post by basinilya » Fri Sep 11, 2015 8:15 pm

Hi. How can I automatically adjust a v4l2 device brightness/contrast based on caprured frame properties? I see manual controls in the monitor settings, but does ZM do anything automatically?

I've read that it could be supported at a driver level, but my driver doesn't seem to have it.

Christo
Posts: 89
Joined: Wed Feb 01, 2012 9:48 pm

Re: v4l2 software auto-brightness/contrast

Post by Christo » Wed Sep 16, 2015 10:52 am

Hello Basinilya,

Take a look at an old post how I made this work!

http://www.zoneminder.com/forums/viewto ... =9&t=21316

regards and success, Christo

basinilya
Posts: 11
Joined: Sat Jul 04, 2015 3:46 pm

Re: v4l2 software auto-brightness/contrast

Post by basinilya » Wed Sep 16, 2015 11:14 am

Does ZM store the latest frame anywhere? I know the location is /var/cache/zoneminder in recorder mode, but what about modect mode?
Nevermind, found `zmu -qi`

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