config option for stationary detection interval

frigate/config.py

@@ -162,6 +162,9 @@ class DetectConfig(FrigateBaseModel):
     max_disappeared: Optional[int] = Field(
         title="Maximum number of frames the object can dissapear before detection ends."
     )
+    stationary_interval: Optional[int] = Field(
+        title="Frame interval for checking stationary objects."
+    )
 
 
 class FilterConfig(FrigateBaseModel):
@@ -745,6 +748,11 @@ class FrigateConfig(FrigateBaseModel):
             if camera_config.detect.max_disappeared is None:
                 camera_config.detect.max_disappeared = max_disappeared
 
+            # Default stationary_interval configuration
+            stationary_interval = camera_config.detect.fps * 10
+            if camera_config.detect.stationary_interval is None:
+                camera_config.detect.stationary_interval = stationary_interval
+
             # FFMPEG input substitution
             for input in camera_config.ffmpeg.inputs:
                 input.path = input.path.format(**FRIGATE_ENV_VARS)

frigate/video.py

@@ -14,7 +14,7 @@ import numpy as np
 from cv2 import cv2
 from setproctitle import setproctitle
 
-from frigate.config import CameraConfig
+from frigate.config import CameraConfig, DetectConfig
 from frigate.edgetpu import RemoteObjectDetector
 from frigate.log import LogPipe
 from frigate.motion import MotionDetector
@@ -367,6 +367,7 @@ def track_camera(
         frame_queue,
         frame_shape,
         model_shape,
+        config.detect,
         frame_manager,
         motion_detector,
         object_detector,
@@ -448,6 +449,7 @@ def process_frames(
     frame_queue: mp.Queue,
     frame_shape,
     model_shape,
+    detect_config: DetectConfig,
     frame_manager: FrameManager,
     motion_detector: MotionDetector,
     object_detector: RemoteObjectDetector,
@@ -502,12 +504,13 @@ def process_frames(
         motion_boxes = motion_detector.detect(frame)
 
         # get stationary object ids
-        # check every 10th frame for stationary objects
+        # check every Nth frame for stationary objects
+        # disappeared objects are not stationary
         stationary_object_ids = [
             obj["id"]
             for obj in object_tracker.tracked_objects.values()
             if obj["motionless_count"] >= 10
-            and obj["motionless_count"] % 10 != 0
+            and obj["motionless_count"] % detect_config.stationary_interval != 0
             and object_tracker.disappeared[obj["id"]] == 0
         ]