Send mqtt message when motion is detected

frigate/app.py

@@ -255,6 +255,8 @@ class FrigateApp:
                 args=(
                     name,
                     config,
+                    self.mqtt_client,
+                    self.config.mqtt.topic_prefix,
                     model_shape,
                     self.config.model.merged_labelmap,
                     self.detection_queue,

frigate/video.py

@@ -340,6 +340,8 @@ def capture_camera(name, config: CameraConfig, process_info):
 def track_camera(
     name,
     config: CameraConfig,
+    mqtt_client,
+    mqtt_prefix,
     model_shape,
     labelmap,
     detection_queue,
@@ -381,6 +383,8 @@ def track_camera(
 
     process_frames(
         name,
+        mqtt_client,
+        mqtt_prefix,
         frame_queue,
         frame_shape,
         model_shape,
@@ -468,6 +472,8 @@ def detect(
 
 def process_frames(
     camera_name: str,
+    mqtt_client,
+    mqtt_prefix,
     frame_queue: mp.Queue,
     frame_shape,
     model_shape,
@@ -518,6 +524,9 @@ def process_frames(
         # look for motion if enabled
         motion_boxes = motion_detector.detect(frame) if motion_enabled.value else []
 
+        if mqtt_client:
+            mqtt_client(f"{mqtt_prefix}/{camera_name}/motion/detected", True if motion_boxes else False, False)
+
         regions = []
 
         # if detection is disabled