fixing camera n1235

src/streamlit_app.py

@@ -323,6 +323,25 @@ def create_confidence_chart(detections):
     
     return fig
 
+def get_rtc_configuration():
+    """Build RTC config from env vars (TURN optional)."""
+    turn_url = os.getenv("TURN_URL")
+    turn_username = os.getenv("TURN_USERNAME")
+    turn_password = os.getenv("TURN_PASSWORD")
+
+    ice_servers = [
+        {"urls": ["stun:stun.l.google.com:19302", "stun:stun1.l.google.com:19302"]}
+    ]
+
+    if turn_url and turn_username and turn_password:
+        ice_servers.append({
+            "urls": [turn_url],
+            "username": turn_username,
+            "credential": turn_password
+        })
+
+    return {"iceServers": ice_servers}
+
 class RealtimeVideoProcessor(VideoProcessorBase):
     def __init__(self, model, conf_threshold):
         self.model = model
@@ -533,16 +552,17 @@ def main():
 
         model = st.session_state.model
 
+        rtc_config = get_rtc_configuration()
+
+        if not os.getenv("TURN_URL"):
+            st.info("Live camera may fail on some networks without TURN. Set TURN_URL, TURN_USERNAME, TURN_PASSWORD to improve connectivity.")
+
         webrtc_ctx = webrtc_streamer(
             key="realtime_camera",
             video_processor_factory=lambda: RealtimeVideoProcessor(model, conf_threshold),
             media_stream_constraints={"video": True, "audio": False},
             async_processing=True,
-            rtc_configuration={
-                "iceServers": [
-                    {"urls": ["stun:stun.l.google.com:19302", "stun:stun1.l.google.com:19302"]}
-                ]
-            }
+            rtc_configuration=rtc_config
         )
 
         realtime_detections = None