Update app.py

app.py

@@ -1,5 +1,5 @@
 import streamlit as st
-from streamlit_webrtc import webrtc_streamer
+from streamlit_webrtc import webrtc_streamer, WebRtcMode
 import av
 
 st.title("Webcam Display Streamlit App")
@@ -16,5 +16,5 @@ webrtc_streamer(
     key="streamer",
     video_frame_callback=transform,  # The transform function is only used to process frames
     sendback_audio=False,  # We don't need audio in this case
-    mode="SENDRECV",  # Bidirectional mode to send and receive video
+    mode=WebRtcMode.SENDRECV,  # Use WebRtcMode enum instead of string
 )