It seems most cameras come with a IR delay field. My Dahua has values from 2 seconds to 10 seconds and defaults to 6. My Hikvision has values from 5 seconds to 120 seconds and defaults to 5. What is the point of this field and why would you choose 120 seconds over 5?
As each camera has a separate daylight sensor, each one will switch over from day / night at different times, perhaps other cameras still in night mode will need the IR lighting from an adjacent camera? ( so you can extend the time the IR LEDs are on )
After my roommate put an outdoor Christmas tree on the front porch last week, I had to play around with this setting a bit.
The light from the tree plus the light from cars headlights are they drive by was enough to cause the camera to switch from b/w mode (at night) to color mode. But by the time it switched to color mode, the cars headlights were gone, so it switched back to b/w.
When cars drive by, their headlights are only in the shot for 5-6 seconds, so I changed this delay (until the Christmas tree goes away) to 30 seconds and now it doesn't switch to color mode at night when single cars drive by.
The delay exists to reduce unintended switches due to brief changes in lighting. The switching involves physically moving an infrared filter in and out of the light path, and the mechanism can wear out prematurely if it flips too often.
The delay exists to reduce unintended switches due to brief changes in lighting. The switching involves physically moving an infrared filter in and out of the light path, and the mechanism can wear out prematurely if it flips too often.
