Update app.py

app.py

@@ -13,7 +13,7 @@ if st.button("example"):
 
 ## Process video
 if file_video is not None:
-    video = open(file_video)
+    video = open(file_video, "wb")
     video_bytes = video.read()
     output = smartcities(video_bytes)
     col1, col2 = st.columns(2)