fix: tracking works but absent not work

app.py

@@ -201,10 +201,11 @@ else:
 os.makedirs("models", exist_ok=True)
 logger.info("Ensured models directory exists")
 
-# Initialize stream manager with config value
+# Stream manager already initialized at module level with max_streams=20
-from core.streaming import initialize_stream_manager
+# Calling initialize_stream_manager() creates a NEW instance, breaking references
-initialize_stream_manager(max_streams=config.get('max_streams', 10))
+# from core.streaming import initialize_stream_manager
-logger.info(f"Initialized stream manager with max_streams={config.get('max_streams', 10)}")
+# initialize_stream_manager(max_streams=config.get('max_streams', 10))
+logger.info(f"Using stream manager with max_streams=20 (module-level initialization)")
 
 # Frames are now stored in the shared cache buffer from core.streaming.buffers
 # latest_frames = {}  # Deprecated - using shared_cache_buffer instead

core/communication/websocket.py

@@ -197,18 +197,24 @@ class WebSocketHandler:
 
     async def _handle_set_subscription_list(self, message: SetSubscriptionListMessage) -> None:
         """Handle setSubscriptionList message for declarative subscription management."""
-        logger.info(f"[RX Processing] setSubscriptionList with {len(message.subscriptions)} subscriptions")
+        logger.info(f"🎯 [RX Processing] setSubscriptionList with {len(message.subscriptions)} subscriptions")
+        for i, sub in enumerate(message.subscriptions):
+            logger.info(f"   📋 Sub {i+1}: {sub.subscriptionIdentifier} (model: {sub.modelId})")
 
         # Update worker state with new subscriptions
         worker_state.set_subscriptions(message.subscriptions)
 
         # Phase 2: Download and manage models
+        logger.info("📦 Starting model download phase...")
         await self._ensure_models(message.subscriptions)
+        logger.info("✅ Model download phase complete")
 
         # Phase 3 & 4: Integrate with streaming management and tracking
+        logger.info("🎬 Starting stream subscription update...")
         await self._update_stream_subscriptions(message.subscriptions)
+        logger.info("✅ Stream subscription update complete")
 
-        logger.info("Subscription list updated successfully")
+        logger.info("🏁 Subscription list updated successfully")
 
     async def _ensure_models(self, subscriptions) -> None:
         """Ensure all required models are downloaded and available."""

core/streaming/manager.py

@@ -85,8 +85,11 @@ class StreamManager:
             with self._round_robin_lock:
                 if camera_id not in self._camera_list:
                     self._camera_list.append(camera_id)
-
+                    logger.info(f"✅ Created tracking queue for camera {camera_id}, camera_list now has {len(self._camera_list)} cameras: {self._camera_list}")
-            logger.info(f"Created tracking queue for camera {camera_id}")
+                else:
+                    logger.warning(f"Camera {camera_id} already in camera_list")
+        else:
+            logger.debug(f"Camera {camera_id} already has tracking queue")
 
     def _remove_camera_queue(self, camera_id: str):
         """Remove tracking queue for a camera that's no longer active."""
@@ -153,6 +156,10 @@ class StreamManager:
                 if not success:
                     self._remove_subscription_internal(subscription_id)
                     return False
+            else:
+                # Stream already exists, but ensure queue exists too
+                logger.info(f"Stream already exists for {camera_id}, ensuring queue exists")
+                self._ensure_camera_queue(camera_id)
 
             logger.info(f"Added subscription {subscription_id} for camera {camera_id} "
                        f"({len(self._camera_subscribers[camera_id])} total subscribers)")
@@ -188,6 +195,7 @@ class StreamManager:
     def _start_stream(self, camera_id: str, stream_config: StreamConfig) -> bool:
         """Start a stream for the given camera."""
         try:
+            logger.info(f"🚀 _start_stream called for {camera_id}")
             if stream_config.rtsp_url:
                 # RTSP stream using FFmpeg subprocess with CUDA acceleration
                 logger.info(f"\033[94m[RTSP] Starting {camera_id}\033[0m")
@@ -199,7 +207,9 @@ class StreamManager:
                 reader.set_frame_callback(self._frame_callback)
                 reader.start()
                 self._streams[camera_id] = reader
+                logger.info(f"🎬 About to call _ensure_camera_queue for {camera_id}")
                 self._ensure_camera_queue(camera_id)  # Create tracking queue
+                logger.info(f"✅ _ensure_camera_queue completed for {camera_id}")
                 logger.info(f"\033[92m[RTSP] {camera_id} connected\033[0m")
 
             elif stream_config.snapshot_url:
@@ -214,7 +224,9 @@ class StreamManager:
                 reader.set_frame_callback(self._frame_callback)
                 reader.start()
                 self._streams[camera_id] = reader
+                logger.info(f"🎬 About to call _ensure_camera_queue for {camera_id}")
                 self._ensure_camera_queue(camera_id)  # Create tracking queue
+                logger.info(f"✅ _ensure_camera_queue completed for {camera_id}")
                 logger.info(f"\033[92m[HTTP] {camera_id} connected\033[0m")
 
             else:
@@ -334,18 +346,22 @@ class StreamManager:
 
         while not self._stop_workers.is_set():
             try:
+                logger.debug(f"Worker {threading.current_thread().name} loop iteration, stop_event={self._stop_workers.is_set()}")
+
                 # Get next camera in round-robin fashion
                 camera_id, item = self._get_next_camera_item()
 
                 if camera_id is None:
                     # No cameras have items, sleep briefly
                     consecutive_empty += 1
+                    logger.debug(f"Worker {threading.current_thread().name}: All queues empty ({consecutive_empty}/{max_consecutive_empty})")
                     if consecutive_empty >= max_consecutive_empty:
                         time.sleep(0.1)  # Sleep 100ms if nothing to process
                         consecutive_empty = 0
                     continue
 
                 consecutive_empty = 0  # Reset counter when we find work
+                logger.info(f"Worker {threading.current_thread().name}: Processing frame from {camera_id}")
 
                 frame = item['frame']
                 timestamp = item['timestamp']
@@ -353,11 +369,13 @@ class StreamManager:
                 # Check if frame is too old (drop if > 1 second old)
                 age = time.time() - timestamp
                 if age > 1.0:
-                    logger.debug(f"Dropping old frame for {camera_id} (age: {age:.2f}s)")
+                    logger.warning(f"Dropping old frame for {camera_id} (age: {age:.2f}s)")
                     continue
 
+                logger.info(f"Worker {threading.current_thread().name}: Calling tracking sync for {camera_id}")
                 # Process tracking for this camera's frame
                 self._process_tracking_for_camera_sync(camera_id, frame)
+                logger.info(f"Worker {threading.current_thread().name}: Finished tracking sync for {camera_id}")
 
             except Exception as e:
                 logger.error(f"Error in tracking worker: {e}", exc_info=True)
@@ -367,32 +385,48 @@ class StreamManager:
     def _get_next_camera_item(self):
         """Get next item from camera queues using round-robin scheduling."""
         with self._round_robin_lock:
-            if not self._camera_list:
+            # Get current list of cameras from actual tracking queues (central state)
+            camera_list = list(self._tracking_queues.keys())
+
+            # Debug: show ALL state
+            logger.info(f"🔍 _tracking_queues keys: {list(self._tracking_queues.keys())}")
+            logger.info(f"🔍 _streams keys: {list(self._streams.keys())}")
+            logger.info(f"🔍 _subscriptions keys: {list(self._subscriptions.keys())}")
+
+            if not camera_list:
+                logger.warning("⚠️ _get_next_camera_item: No cameras have tracking queues yet, but streams/subscriptions exist!")
                 return None, None
 
+            logger.debug(f"_get_next_camera_item: {len(camera_list)} cameras with queues: {camera_list}")
+
             attempts = 0
-            max_attempts = len(self._camera_list)
+            max_attempts = len(camera_list)
 
             while attempts < max_attempts:
-                # Get current camera
+                # Get current camera using round-robin index
-                if self._camera_round_robin_index >= len(self._camera_list):
+                if self._camera_round_robin_index >= len(camera_list):
                     self._camera_round_robin_index = 0
 
-                camera_id = self._camera_list[self._camera_round_robin_index]
+                camera_id = camera_list[self._camera_round_robin_index]
+                logger.debug(f"_get_next_camera_item: Trying camera {camera_id} (attempt {attempts + 1}/{max_attempts})")
 
                 # Move to next camera for next call
-                self._camera_round_robin_index = (self._camera_round_robin_index + 1) % len(self._camera_list)
+                self._camera_round_robin_index = (self._camera_round_robin_index + 1) % len(camera_list)
 
                 # Try to get item from this camera's queue
-                if camera_id in self._tracking_queues:
+                queue_size = self._tracking_queues[camera_id].qsize()
-                    try:
+                logger.debug(f"_get_next_camera_item: Camera {camera_id} queue has {queue_size} items")
-                        item = self._tracking_queues[camera_id].get_nowait()
+                try:
-                        return camera_id, item
+                    item = self._tracking_queues[camera_id].get_nowait()
-                    except queue.Empty:
+                    logger.info(f"_get_next_camera_item: Got item from {camera_id}")
-                        pass  # Try next camera
+                    return camera_id, item
+                except queue.Empty:
+                    logger.debug(f"_get_next_camera_item: Camera {camera_id} queue empty")
+                    pass  # Try next camera
 
                 attempts += 1
 
+            logger.debug("_get_next_camera_item: All cameras empty")
             return None, None  # All cameras empty
 
     def _process_tracking_for_camera_sync(self, camera_id: str, frame):
@@ -404,7 +438,12 @@ class StreamManager:
             for subscription_id in subscription_ids:
                 subscription_info = self._subscriptions.get(subscription_id)
 
-                if not subscription_info or not subscription_info.tracking_integration:
+                if not subscription_info:
+                    logger.warning(f"No subscription info found for {subscription_id}")
+                    continue
+
+                if not subscription_info.tracking_integration:
+                    logger.debug(f"No tracking integration for {subscription_id} (camera {camera_id}), skipping inference")
                     continue
 
                 display_id = subscription_id.split(';')[0] if ';' in subscription_id else subscription_id