fix: realtime multi cam

test_tracking_realtime.py

@@ -266,7 +266,7 @@ def main_multi_stream():
             conn = manager.connect_stream(
                 rtsp_url=rtsp_url,
                 stream_id=stream_id,
-                buffer_size=30
+                buffer_size=5
             )
             connections[stream_id] = conn
             print(f"✓ Connected: {stream_id}")
@@ -289,10 +289,19 @@ def main_multi_stream():
     start_time = time.time()
 
     try:
-        # Simple approach: iterate over first connection's results
-        # In production, you'd properly merge all result streams
+        # Merge all result queues from all connections
+        import queue as queue_module
+
+        running = True
+        while running:
+            # Poll all connection queues (non-blocking)
+            got_result = False
             for conn in connections.values():
-            for result in conn.tracking_results():
+                try:
+                    # Non-blocking get from each connection's queue
+                    result = conn.result_queue.get_nowait()
+                    got_result = True
+
                     total_results += 1
                     stream_id = result.stream_id
 
@@ -310,6 +319,13 @@ def main_multi_stream():
                             s_fps = stats['count'] / s_elapsed if s_elapsed > 0 else 0
                             print(f"  {sid}: {stats['count']} ({s_fps:.1f} FPS)")
 
+                except queue_module.Empty:
+                    continue
+
+            # Small sleep if no results to avoid busy loop
+            if not got_result:
+                time.sleep(0.01)
+
 
     except KeyboardInterrupt:
         print(f"\n✓ Interrupted")