<![CDATA[How to measure brightness of a video]]>Hello!

I need to trigger recording of a new video clip (from pix_video) every time brightness of a camera view decreases under certain level... And also to stop recording when it gets brighter again...

Does anyone have any idea what kind of object I should use to measure light?

]]>http://forum.pdpatchrepo.info/topic/7529/how-to-measure-brightness-of-a-videoRSS for NodeFri, 15 May 2026 14:04:07 GMTSun, 07 Jul 2013 03:59:47 GMT60<![CDATA[Reply to How to measure brightness of a video on Sun, 07 Jul 2013 03:59:47 GMT]]>Hello!

I need to trigger recording of a new video clip (from pix_video) every time brightness of a camera view decreases under certain level... And also to stop recording when it gets brighter again...

Does anyone have any idea what kind of object I should use to measure light?

]]>http://forum.pdpatchrepo.info/topic/7529/how-to-measure-brightness-of-a-videohttp://forum.pdpatchrepo.info/topic/7529/how-to-measure-brightness-of-a-videoSun, 07 Jul 2013 03:59:47 GMT<![CDATA[Reply to How to measure brightness of a video on Mon, 08 Jul 2013 16:13:57 GMT]]>you can try [pix_mean] to get the average brightness then trigger something when the value goes below a certain threshold

]]>http://forum.pdpatchrepo.info/topic/7529/how-to-measure-brightness-of-a-video/2http://forum.pdpatchrepo.info/topic/7529/how-to-measure-brightness-of-a-video/2Mon, 08 Jul 2013 16:13:57 GMT<![CDATA[Reply to How to measure brightness of a video on Fri, 12 Jul 2013 14:46:11 GMT]]>Its strange, but I can not create that object...

I have tried in both 0.42.5 and 0.43.4.

]]>http://forum.pdpatchrepo.info/topic/7529/how-to-measure-brightness-of-a-video/3http://forum.pdpatchrepo.info/topic/7529/how-to-measure-brightness-of-a-video/3Fri, 12 Jul 2013 14:46:11 GMT<![CDATA[Reply to How to measure brightness of a video on Sun, 14 Jul 2013 10:32:54 GMT]]>pix_mean_color has solved the problem...

Thanks!!

]]>http://forum.pdpatchrepo.info/topic/7529/how-to-measure-brightness-of-a-video/4http://forum.pdpatchrepo.info/topic/7529/how-to-measure-brightness-of-a-video/4Sun, 14 Jul 2013 10:32:54 GMT