Update app.py

app.py

@@ -127,7 +127,7 @@ def infer(url_in,interpolation,fps_output):
     files = final_vid
 
     depth_map = cv2.VideoCapture(final_vid)
-    print("total frames: " + len(frames_list))
+    print("total frames: " + str(len(frames_list)))
 
     ret, fr1 = depth_map.read()
     prvs = cv2.cvtColor(fr1, cv2.COLOR_RGBA2GRAY)