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}")
@@ -289,26 +289,42 @@ 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
-        for conn in connections.values():
-            for result in conn.tracking_results():
-                total_results += 1
-                stream_id = result.stream_id
+        # Merge all result queues from all connections
+        import queue as queue_module
 
-                if stream_id in stream_stats:
-                    stream_stats[stream_id]['count'] += 1
+        running = True
+        while running:
+            # Poll all connection queues (non-blocking)
+            got_result = False
+            for conn in connections.values():
+                try:
+                    # Non-blocking get from each connection's queue
+                    result = conn.result_queue.get_nowait()
+                    got_result = True
 
-                # Print stats every 100 results
-                if total_results % 100 == 0:
-                    elapsed = time.time() - start_time
-                    total_fps = total_results / elapsed if elapsed > 0 else 0
+                    total_results += 1
+                    stream_id = result.stream_id
 
-                    print(f"\nTotal: {total_results} | {elapsed:.1f}s | {total_fps:.1f} FPS")
-                    for sid, stats in stream_stats.items():
-                        s_elapsed = time.time() - stats['start']
-                        s_fps = stats['count'] / s_elapsed if s_elapsed > 0 else 0
-                        print(f"  {sid}: {stats['count']} ({s_fps:.1f} FPS)")
+                    if stream_id in stream_stats:
+                        stream_stats[stream_id]['count'] += 1
+
+                    # Print stats every 100 results
+                    if total_results % 100 == 0:
+                        elapsed = time.time() - start_time
+                        total_fps = total_results / elapsed if elapsed > 0 else 0
+
+                        print(f"\nTotal: {total_results} | {elapsed:.1f}s | {total_fps:.1f} FPS")
+                        for sid, stats in stream_stats.items():
+                            s_elapsed = time.time() - stats['start']
+                            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: