Use zmq for event end queue and update python deps

docker/main/requirements-wheels.txt

@@ -4,11 +4,11 @@ imutils == 0.5.*
 markupsafe == 2.1.*
 matplotlib == 3.7.*
 mypy == 1.6.1
-numpy == 1.23.*
+numpy == 1.26.*
 onvif_zeep == 0.2.12
 opencv-python-headless == 4.7.0.*
 paho-mqtt == 2.0.*
-pandas == 2.1.4
+pandas == 2.2.*
 peewee == 3.17.*
 peewee_migrate == 1.12.*
 psutil == 5.9.*

frigate/app.py

@@ -200,9 +200,6 @@ def set_log_levels(self) -> None:
             logging.getLogger("ws4py").setLevel("ERROR")
 
     def init_queues(self) -> None:
-        # Queues for clip processing
-        self.event_processed_queue: Queue = mp.Queue()
-
         # Queue for cameras to push tracked objects to
         self.detected_frames_queue: Queue = mp.Queue(
             maxsize=sum(camera.enabled for camera in self.config.cameras.values()) * 2
@@ -420,7 +417,6 @@ def start_detected_frames_processor(self) -> None:
             self.config,
             self.dispatcher,
             self.detected_frames_queue,
-            self.event_processed_queue,
             self.ptz_autotracker_thread,
             self.stop_event,
         )
@@ -517,7 +513,6 @@ def start_timeline_processor(self) -> None:
     def start_event_processor(self) -> None:
         self.event_processor = EventProcessor(
             self.config,
-            self.event_processed_queue,
             self.timeline_queue,
             self.stop_event,
         )
@@ -704,7 +699,6 @@ def stop(self) -> None:
             shm.unlink()
 
         for queue in [
-            self.event_processed_queue,
             self.detected_frames_queue,
             self.log_queue,
         ]:

frigate/comms/detections_updater.py

@@ -8,7 +8,7 @@
 
 SOCKET_CONTROL = "inproc://control.detections_updater"
 SOCKET_PUB = "ipc:///tmp/cache/detect_pub"
-SOCKET_SUB = "ipc:///tmp/cache/detect_sun"
+SOCKET_SUB = "ipc:///tmp/cache/detect_sub"
 
 
 class DetectionTypeEnum(str, Enum):

frigate/comms/events_updater.py

@@ -5,6 +5,7 @@
 from frigate.events.types import EventStateEnum, EventTypeEnum
 
 SOCKET_PUSH_PULL = "ipc:///tmp/cache/events"
+SOCKET_PUSH_PULL_END = "ipc:///tmp/cache/events_ended"
 
 
 class EventUpdatePublisher:
@@ -37,7 +38,53 @@ def __init__(self) -> None:
     def check_for_update(
         self, timeout=1
     ) -> tuple[EventTypeEnum, EventStateEnum, str, dict[str, any]]:
-        """Returns updated config or None if no update."""
+        """Returns events or None if no update."""
+        try:
+            has_update, _, _ = zmq.select([self.socket], [], [], timeout)
+
+            if has_update:
+                return self.socket.recv_pyobj()
+        except zmq.ZMQError:
+            pass
+
+        return None
+
+    def stop(self) -> None:
+        self.socket.close()
+        self.context.destroy()
+
+
+class EventEndPublisher:
+    """Publishes events that have ended."""
+
+    def __init__(self) -> None:
+        self.context = zmq.Context()
+        self.socket = self.context.socket(zmq.PUSH)
+        self.socket.connect(SOCKET_PUSH_PULL_END)
+
+    def publish(
+        self, payload: tuple[EventTypeEnum, EventStateEnum, str, dict[str, any]]
+    ) -> None:
+        """There is no communication back to the processes."""
+        self.socket.send_pyobj(payload)
+
+    def stop(self) -> None:
+        self.socket.close()
+        self.context.destroy()
+
+
+class EventEndSubscriber:
+    """Receives events that have ended."""
+
+    def __init__(self) -> None:
+        self.context = zmq.Context()
+        self.socket = self.context.socket(zmq.PULL)
+        self.socket.bind(SOCKET_PUSH_PULL_END)
+
+    def check_for_update(
+        self, timeout=1
+    ) -> tuple[EventTypeEnum, EventStateEnum, str, dict[str, any]]:
+        """Returns events ended or None if no update."""
         try:
             has_update, _, _ = zmq.select([self.socket], [], [], timeout)
 

frigate/events/maintainer.py

@@ -5,7 +5,7 @@
 from multiprocessing.synchronize import Event as MpEvent
 from typing import Dict
 
-from frigate.comms.events_updater import EventUpdateSubscriber
+from frigate.comms.events_updater import EventEndPublisher, EventUpdateSubscriber
 from frigate.config import EventsConfig, FrigateConfig
 from frigate.events.types import EventStateEnum, EventTypeEnum
 from frigate.models import Event
@@ -52,19 +52,18 @@ class EventProcessor(threading.Thread):
     def __init__(
         self,
         config: FrigateConfig,
-        event_processed_queue: Queue,
         timeline_queue: Queue,
         stop_event: MpEvent,
     ):
         threading.Thread.__init__(self)
         self.name = "event_processor"
         self.config = config
-        self.event_processed_queue = event_processed_queue
         self.timeline_queue = timeline_queue
         self.events_in_process: Dict[str, Event] = {}
         self.stop_event = stop_event
 
         self.event_receiver = EventUpdateSubscriber()
+        self.event_end_publisher = EventEndPublisher()
 
     def run(self) -> None:
         # set an end_time on events without an end_time on startup
@@ -118,6 +117,7 @@ def run(self) -> None:
             Event.end_time == None
         ).execute()
         self.event_receiver.stop()
+        self.event_end_publisher.stop()
         logger.info("Exiting event processor...")
 
     def handle_object_detection(
@@ -242,7 +242,7 @@ def handle_object_detection(
 
         if event_type == EventStateEnum.end:
             del self.events_in_process[event_data["id"]]
-            self.event_processed_queue.put((event_data["id"], camera))
+            self.event_end_publisher.publish((event_data["id"], camera))
 
     def handle_external_detection(
         self, event_type: EventStateEnum, event_data: Event

frigate/object_processing.py

@@ -6,6 +6,7 @@
 import queue
 import threading
 from collections import Counter, defaultdict
+from multiprocessing.synchronize import Event as MpEvent
 from statistics import median
 from typing import Callable
 
@@ -14,7 +15,7 @@
 
 from frigate.comms.detections_updater import DetectionPublisher, DetectionTypeEnum
 from frigate.comms.dispatcher import Dispatcher
-from frigate.comms.events_updater import EventUpdatePublisher
+from frigate.comms.events_updater import EventEndSubscriber, EventUpdatePublisher
 from frigate.config import (
     CameraConfig,
     FrigateConfig,
@@ -827,7 +828,6 @@ def __init__(
         config: FrigateConfig,
         dispatcher: Dispatcher,
         tracked_objects_queue,
-        event_processed_queue,
         ptz_autotracker_thread,
         stop_event,
     ):
@@ -836,14 +836,14 @@ def __init__(
         self.config = config
         self.dispatcher = dispatcher
         self.tracked_objects_queue = tracked_objects_queue
-        self.event_processed_queue = event_processed_queue
-        self.stop_event = stop_event
+        self.stop_event: MpEvent = stop_event
         self.camera_states: dict[str, CameraState] = {}
         self.frame_manager = SharedMemoryFrameManager()
         self.last_motion_detected: dict[str, float] = {}
         self.ptz_autotracker_thread = ptz_autotracker_thread
         self.detection_publisher = DetectionPublisher(DetectionTypeEnum.video)
         self.event_sender = EventUpdatePublisher()
+        self.event_end_subscriber = EventEndSubscriber()
 
         def start(camera, obj: TrackedObject, current_frame_time):
             self.event_sender.publish(
@@ -1215,10 +1215,16 @@ def run(self):
                     )
 
             # cleanup event finished queue
-            while not self.event_processed_queue.empty():
-                event_id, camera = self.event_processed_queue.get()
+            while not self.stop_event.is_set():
+                update = self.event_end_subscriber.check_for_update(timeout=0.01)
+
+                if not update:
+                    break
+
+                event_id, camera = update
                 self.camera_states[camera].finished(event_id)
 
         self.detection_publisher.stop()
         self.event_sender.stop()
+        self.event_end_subscriber.stop()
         logger.info("Exiting object processor...")