The missing hour in a camera report
Two empty incident lists can describe very different weekends. In one, an empty yard sat under observation the whole time. In the other, the camera never came online. Start the audit from scheduled seconds, then ask for evidence that the detection process was actually running during each interval.
Say one camera is scheduled from midnight to 06:00, and monitoring stops at 02:10 and returns at 03:10. The eligible total is five camera-hours out of six scheduled. A zero-incident export supplies neither number. Write one line for 00:00–02:10 and another for 03:10–06:00 — 130 and 170 minutes respectively. Their sum, 300 minutes, belongs over the full 360 scheduled. Keep 02:10–03:10 as a gap with its own evidence, alarm or no alarm during that hour.
A report with a built-in denominator
Sightline's PDF opens with each camera's detection hours and an explanation of the gaps, and Icarian says that section stays in the report. That makes the PDF a better starting document for the weekend reconciliation than a standalone incident list. Read it against the actual roster, especially where only some connected cameras have detection enabled. A06/P04 · Report contents · A09 · Detecting camera limits
When a feed stops, Icarian describes a timestamped stale image in its place. On a planned interruption, record that timestamp, the receiver clock and the return-to-service time. A last picture looks much like a current view of an empty yard. For an entirely different exercise, play M03, which holds a picture deliberately inside a file that keeps delivering frames. A14 · Stale-feed behavior · L01 · Frame-hold fixture
Reconciliation entry
Record the site, camera, UTC schedule, monitored intervals, gap reason, evidence filename and reviewer. Any unmatched interval goes on the exceptions list, and its length stays on the record even when the cause is never found. When a rule preview is available, keep the preview's incident count and detection time together — Sightline's preview covers the previous six hours, so a review made later in the morning looks through a different window. A04 · Preview fields
Record identifiers · A04 · A06 · A09 · A14 · P04 · L01 · L02