Events
The Events page provides a centralised view of all detection and motion events captured by the system. Operators can filter, review, and export event clips, and flag false detections to improve AI model accuracy over time.
Event Sources
Section titled “Event Sources”Meridian VMS captures events from multiple sources:
Object Detection : Events generated by the AI detection engine when objects of interest (people, vehicles, etc.) are detected within configured detection zones.
Motion Detection (ONVIF PullPoint) : Motion events received from cameras via the ONVIF PullPoint subscription mechanism. These are generated by the camera’s built-in motion detection and delivered to Meridian VMS through a standards-based event subscription.
ONVIF Events : Other ONVIF-sourced events beyond motion, such as tamper detection or input triggers.
Filtering Events
Section titled “Filtering Events”The Events page provides several filtering mechanisms to narrow down the event list.
Date and Time Range
Section titled “Date and Time Range”Select a start and end date/time to view events within a specific period. This is the primary filter for investigating incidents that occurred at a known time.
Source Filter
Section titled “Source Filter”Filter events by their originating source:
| Filter | Shows |
|---|---|
| All | Events from all sources |
| Object Detection | Only AI detection events |
| Motion | Only ONVIF motion detection events |
| ONVIF | All ONVIF-sourced events |
Object Type Tiles
Section titled “Object Type Tiles”When viewing object detection events, the page displays a row of object type tiles — one for each detected class (person, vehicle, etc.). Each tile shows the class name and the total count of events for that class within the selected time range.
Tiles are sorted by count in descending order, so the most frequently detected object types appear first. Click a tile to filter the event table to show only events of that class.
Event Table
Section titled “Event Table”The main event list is displayed as a table with the following columns:
- Thumbnail — a snapshot image captured at the time of detection
- Timestamp — date and time of the event
- Camera — the camera that generated the event
- Type — the event source (detection, motion, ONVIF)
- Object class — for detection events, the detected object type
- Confidence — for detection events, the model confidence score
Click any row to open the event playback modal.
Event Playback Modal
Section titled “Event Playback Modal”Selecting an event opens a playback modal that shows a 30-second MP4 clip of the event in context:
- 25 seconds before the event timestamp
- 5 seconds after the event timestamp
This pre-roll/post-roll window provides operators with enough context to understand what happened before and after the detection.
Timeline with Event Markers
Section titled “Timeline with Event Markers”The event playback modal includes a mini-timeline that displays tick marks for:
- Motion events — indicating when the camera’s built-in motion detection was triggered
- Detection events — indicating when the AI detection engine identified objects
These markers help operators quickly identify clusters of activity around the event being reviewed.
Export Clip
Section titled “Export Clip”From the event playback modal, click Export Clip to download the 30-second event clip as a standalone MP4 file. This is useful for evidence collection, incident reports, or sharing with external parties.
False Detection Flagging
Section titled “False Detection Flagging”Operators can flag events as false detections directly from the event table or the playback modal. Flagged events are:
- Marked visually in the event table so they can be easily identified
- Excluded from alarm trigger evaluation
- Collected as training data for future AI model improvement
RBAC and Visibility
Section titled “RBAC and Visibility”The Events page respects role-based access control. Operators only see events from cameras within their permitted locations.