diff --git a/app.py b/app.py
index cce2c75..28a1491 100644
--- a/app.py
+++ b/app.py
@@ -69,6 +69,7 @@ def worker(id,source,region=None,stream=False):
         if not cap.isOpened():
             print("Error opening video stream.")
         while True:
+            ret, frame = cap.read()
             ret, frame = cap.read()
             if not ret:
                 print("Error read video stream.")