Speed of Vehicle

[3D-Simgear]

Hi all,

today i stumbled on the estimated speed feature. I did activate it and added the zone including the distance. But where can i see the speed a vehicel is driving? Its not passed to HA as an entity nor do i find it somewhere in frigate.

[inkeep-ai-assistant[bot]]

The speed information for vehicles can be found in several places in Frigate:

In the Frigate UI:
The average speed of your object as it moved through your zone is saved in Frigate's database and can be seen in the UI in the Tracked Object Details pane in Explore(1). Current estimated speed can also be seen on the debug view as the third value in the object label(1).

Via MQTT:
Current estimated speed, average estimated speed, and velocity angle (the angle of the direction the object is moving relative to the frame) of tracked objects is sent through the events MQTT topic(1). The MQTT event includes current_estimated_speed and average_estimated_speed fields(2).

For Home Assistant Integration:
Frigate doesn't automatically create a speed entity in Home Assistant. However, you can create an MQTT sensor to capture the speed data. Here's an example configuration to get the average speed when a car leaves your speed zone(3):

mqtt:
  sensor:
    - name: "Driveway Camera Final Car Speed"
      state_topic: "frigate/events"
      unique_id: final-car-speed-sensor
      device_class: "speed"
      state_class: "measurement"
      value_template: >
        {% if value_json.after.label == 'car' and 
              value_json.before.current_zones is defined and 
              value_json.after.current_zones is defined and
              'your_speed_zone_name' in value_json.before.current_zones and
              'your_speed_zone_name' not in value_json.after.current_zones and
              value_json.before.average_estimated_speed is defined %}
          {{ value_json.before.average_estimated_speed }}
        {% else %}
          {{ states('sensor.driveway_camera_final_car_speed') | float(0) }}
        {% endif %}
      unit_of_measurement: "km/h"

(3)

Replace 'your_speed_zone_name' with the actual name of your speed estimation zone(3). The speeds are output as mph or km/h depending on your unit_system setting (imperial or metric)(1).

📚 Sources:

1. Zones
2. MQTT
3. create average speed sensor entity via mqtt that matches UI speed value

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Have another question? Just tag @inkeep.

[hawkeye217]

In addition to the AI's response, you should see the official documentation on the feature: https://docs.frigate.video/configuration/zones/#speed-estimation

[anntnzrb]

Speed data is available in three places:

1. Frigate UI: Enable debug view (Settings → Debug → Zones overlay) - speed shows as the third number on object labels

2. MQTT (for Home Assistant):

mqtt:
  sensor:
    - name: "Car Speed"
      state_topic: "frigate/events"
      value_template: "{{ value_json.before.average_estimated_speed }}"
      unit_of_measurement: "km/h"

3. Explore section: Average speed in Tracked Object Details pane

Note: Speed only calculates when object's bounding box is within a configured speed zone with 4 coordinates and real-world distances.

[hawkeye217]

To be clear, the speed will show in the Debug view only when the object passes through the speed estimation zone. If the zone is small, speed may not be shown. The most reliable place to view it is in Explore's Tracked Object Details pane.