Just installed a brand new VD Pro yesterday, and last night noticed this same issue, i.e.
when dark outside…
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during live view or a motion-triggered recorded event the IR light turns on then off, every 5 or 6 seconds
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even when not in live view or an event, this clicking persists - I noticed this when I walked near my front door (inside) and could hear constant clicking sound.
somehow the clicking sound when NOT in live view or an event did eventually seem to stop last night, in my case - this was perhaps after I was fiddling with some app settings to see if I could fix it. Also at one point I did do a reconnection to the WiFi in case that had any effect - so I can’t say exactly why or when the clicking stopped…
… temporarily. Because this morning I got a motion triggered alert before sunrise (false trigger, a car driving by even though it was well outside my Motion Zone), and the resulting video recording showed the same clicking and turning on and off of the IR lights every 5 or 6 seconds for the entire duration of the 1min recording.
I think I read somewhere else that the clicking is due to a physical IR filter that moves in front of the sensor every time night mode turns on. If that’s the case, this constant clicking every 5 seconds has got to be a serious problem that will eventually lead to a mechanical failure of the camera… From the sounds of other posts here, something changed in a recent firmware update to cause this, I hope it gets resolved soon