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Avoiding stationary objects

Many people use Frigate to detect cars entering their driveway, and they often run into an issue with repeated events of a parked car being repeatedly detected. This is because object tracking stops when motion ends and the event ends. Motion detection works by determining if a sufficient number of pixels have changed between frames. Shadows or other lighting changes will be detected as motion. This will often cause a new event for a parked car.

You can use zones to restrict events and notifications to objects that have entered specific areas.


It is not recommended to use masks to try and eliminate parked cars in your driveway. Masks are designed to prevent motion from triggering object detection and/or to indicate areas that are guaranteed false positives.

Frigate is designed to track objects as they move and over-masking can prevent it from knowing that an object in the current frame is the same as the previous frame. You want Frigate to detect objects everywhere and configure your events and alerts to be based on the location of the object with zones.

To only be notified of cars that enter your driveway from the street, you could create multiple zones that cover your driveway. For cars, you would only notify if entered_zones from the events MQTT topic has more than 1 zone.

See this example from the Zones documentation to see how to restrict zones to certain object types.

Driveway Zones

To limit snapshots and events, you can list the zone for the entrance of your driveway under required_zones in your configuration file. Example below.

- zone_2
coordinates: ... (parking area)
coordinates: ... (entrance to driveway)