fixed local + hosted STUN/TURN

app.py

@@ -134,11 +134,12 @@ def video_frame_callback(frame: av.VideoFrame) -> av.VideoFrame:
 
     return av.VideoFrame.from_ndarray(image, format="bgr24")
 
+ice_servers = get_ice_servers()
 
 webrtc_ctx = webrtc_streamer(
     key="object-detection",
     mode=WebRtcMode.SENDRECV,
-    rtc_configuration={"iceServers": get_ice_servers()},
+    rtc_configuration=ice_servers,
     video_frame_callback=video_frame_callback,
     media_stream_constraints={"video": True, "audio": False},
     async_processing=True,

utils/turn.py

@@ -1,4 +1,4 @@
-import logging 
+import logging
 import os
 
 import streamlit as st
@@ -16,6 +16,11 @@ def get_ice_servers():
     See https://github.com/whitphx/streamlit-webrtc/issues/1213
     """
 
+    GOOGLE_RTC_CONFIGURATION = {
+        "iceServers": [{"urls": ["stun:stun.l.google.com:19302"]}],
+        "iceTransportPolicy": "all",
+    }
+
     # Ref: https://www.twilio.com/docs/stun-turn/api
     try:
         account_sid = os.environ["TWILIO_ACCOUNT_SID"]
@@ -24,7 +29,7 @@ def get_ice_servers():
         logger.warning(
             "Twilio credentials are not set. Fallback to a free STUN server from Google."  # noqa: E501
         )
-        return [{"urls": ["stun:stun.l.google.com:19302"]}]
+        return GOOGLE_RTC_CONFIGURATION
 
     client = Client(account_sid, auth_token)
 
@@ -34,6 +39,9 @@ def get_ice_servers():
         st.warning(
             f"Error occurred while accessing Twilio API. Fallback to a free STUN server from Google. ({e})"  # noqa: E501
         )
-        return [{"urls": ["stun:stun.l.google.com:19302"]}]
+        return GOOGLE_RTC_CONFIGURATION
 
-    return token.ice_servers
+    return {
+        "iceServers": token.ice_servers,
+        "iceTransportPolicy": "all",
+    }