Thank you to the wonderful individuals who have contributed to this discussion. I have been diligently adjusting the motion settings and zone configurations.
Last night, while refining these settings, I encountered some issues, which I think are worth sharing given everyone's involvement in this thread and the amount of interest this topic has generated so far.
Previously, I set up the tripwire zones of two pixels in width which you can see at the top of this page...
The trip wire zones were located towards my front door on the right and the entrance to the camera on the left. However, following Pogo's previous advice, I found this true to be unnecessary and removed it, keeping only one on the left side of the frame.
With the current zone placement toward the left, when someone enters the frame with a pre-trigger record time set to three seconds, it's impossible to identify the cause of the alert as the alert thumbnail itself is blank. Additionally, the shadows entering the zone at night seem to trigger the zone prematurely, possibly because the shadows reach the zone before the person.
To address this, I adjusted the sensitivity settings to Min Obj Size: 150 - Min Contrast: 40, which improved the situation during further tests and left these settings as is.
I spent the evening fine-tuning these settings, walking back and forth to achieve the best configuration. I eventually placed a single vertical line of pixels to
and drew very carefully inside the railing pixel by pixel to avoid capturing any background condensation from my neighbour's flu.
- new-zone.jpg (34.32 KiB) Viewed 18036 times
This seemed to work as condensation has been firing up all morning and not a single alert so I think it was being captured before because maybe a single pixel overlaps on the railing itself may have been sufficient for it to flag up as a detection.
I also adjusted the pre-trigger timers back to their normal values of 3 which seemed to work very well. If I had not deleted the old zone I had no choice but to not use a pre-trigger timer, just to be able to capture who was entering the thumbnail on the far left and I just couldn't deal with it with it's abrupt playback, hence I create a new zone only a single pixel this time, on the X axis and a single pixel Y axis all the way down. I did have concerns this wouldn't work but it did.
This morning, an Amazon delivery arrived, and everything worked as expected, boosting my confidence in the system and thinking this is it, mission accomplished.
- morning.jpg (18.3 KiB) Viewed 18036 times
However, when the doorbell rang later at 15:24 and there was no alert from Blue Iris, I was puzzled. Reviewing the footage, I couldn't understand why it failed to capture another Amazon delivery, this time by a person wearing a high-visibility vest.
- afternoon-no-alert.jpg (47.17 KiB) Viewed 18036 times
I'm considering increasing the sensitivity of the settings, although I am concerned... Living in an area with a high risk of burglaries, I need the system to capture all activity. It's frustrating that it captured one person in the morning but failed to detect someone in a high-visibility vest later.
For now, the only solution seems to be to make the settings more sensitive and try again. I'm concerned about the system's reliability, especially in critical situations like a break-in attempt. It's baffling why it captured one person clearly but missed another, and this inconsistency is worrying.
Regards
SN