Use Open Relay

app.py

@@ -1,3 +1,8 @@
 from streamlit_webrtc import webrtc_streamer
 
-webrtc_streamer(key="sample")
+from turn import get_ice_servers
+
+webrtc_streamer(
+    key="sample",
+    rtc_configuration={"iceServers": get_ice_servers()},
+)

turn.py

@@ -0,0 +1,26 @@
+import logging
+import os
+
+import requests
+import streamlit as st
+
+logger = logging.getLogger(__name__)
+
+
+OPEN_RELAY_API_HOST = os.environ.get("OPEN_RELAY_API_HOST")
+OPEN_RELAY_API_KEY = os.environ.get("OPEN_RELAY_API_KEY")
+
+
+@st.cache_data
+def get_ice_servers():
+    if not OPEN_RELAY_API_HOST or not OPEN_RELAY_API_KEY:
+        logger.warning(
+            "Open Relay API host or key is not set. Fallback to a free STUN server from Google."  # noqa: E501
+        )
+        return [{"urls": ["stun:stun.l.google.com:19302"]}]
+
+    # Get response from Open Relay API
+    response = requests.get(
+        f"https://{OPEN_RELAY_API_HOST}/api/v1/turn/credentials?apiKey={OPEN_RELAY_API_KEY}"  # noqa: E501
+    )
+    return response.json()