Update app.py

Testing webcam

app.py

@@ -51,6 +51,8 @@ def predict_video(video, object, question, frame_drop_value):
     print("TimeStamp {}".format(dt_string))
     vid = cv2.VideoCapture(video)
     count = 0
+    result = None
+    answer = None
     while True:
         ret, frame = vid.read()
         if ret: