Alert - Stationary

Generates an alert when an object is stationary for a specified amount of time. By default the engine analyzes the entire scene but you can also restrict analysis to a region. Before using this analysis engine, configure a task such as Object Class Recognition to track objects.

Configuration Parameter Description
FreeformRegion The region of the scene that you want to monitor.
Input The name of the image track to analyze.
MinimumTime The amount of time that an object must remain stationary.
Region The region of the scene that you want to monitor.
Type The analysis engine to use. Set this parameter to AlertStationary.

Output Tracks

Output track Description
Data Contains one record for each object that is stationary for longer than MinimumTime, for each video frame.
Result Contains one record for each object that is stationary for longer than MinimumTime. If a stationary object moves and then becomes stationary again, Media Server can produce multiple results with the same ID. Media Server increments the value of the alertIndex field each time the object moves and becomes stationary again.
ResultWithSource

The same as the Result track, but each record also includes the best source frame.

Start

The same as the Data track, except it contains only the first record of each event.

End

The same as the Data track, except it contains only the last record of each event.

Alert

Contains one record for each object that is stationary for longer than MinimumTime. If a stationary object moves and then becomes stationary again, Media Server can produce multiple alerts with the same ID. Media Server increments the value of the alertIndex field each time the object moves and becomes stationary again.

This track differs from the Result track because records are created as soon as the object meets the minimum time requirement, rather than when the object starts moving again.

AlertWithSource

The same as the Alert track, but each record also includes the source frame.

To see an example record, use the action GetExampleRecord.