Improve webrtc stability (#1014)

debugging webrtc failed connections

nerfstudio/viewer/app/src/modules/WebRtcWindow/WebRtcWindow.jsx

@@ -18,6 +18,7 @@ export default function WebRtcWindow() {
   const getRTCPeerConnection = () => {
     const pc = new RTCPeerConnection({
       iceServers: [
+        { urls: 'stun:stun.l.google.com:19302' },
         {
           urls: 'stun:openrelay.metered.ca:80',
         },

nerfstudio/viewer/server/viewer_utils.py

@@ -28,7 +28,12 @@ from typing import Any, Dict, Optional, Tuple
 
 import numpy as np
 import torch
-from aiortc import RTCPeerConnection, RTCSessionDescription
+from aiortc import (
+    RTCConfiguration,
+    RTCIceServer,
+    RTCPeerConnection,
+    RTCSessionDescription,
+)
 from cryptography.utils import CryptographyDeprecationWarning
 from rich.console import Console
 
@@ -503,7 +508,25 @@ class ViewerState:
         # returns the description to for WebRTC to the specific websocket connection
         offer = RTCSessionDescription(data["sdp"], data["type"])
 
-        pc = RTCPeerConnection()
+        pc = RTCPeerConnection(
+            configuration=RTCConfiguration(
+                iceServers=[
+                    RTCIceServer(urls="stun:stun.l.google.com:19302"),
+                    RTCIceServer(urls="stun:openrelay.metered.ca:80"),
+                    RTCIceServer(
+                        urls="turn:openrelay.metered.ca:80", username="openrelayproject", credential="openrelayproject"
+                    ),
+                    RTCIceServer(
+                        urls="turn:openrelay.metered.ca:443", username="openrelayproject", credential="openrelayproject"
+                    ),
+                    RTCIceServer(
+                        urls="turn:openrelay.metered.ca:443?transport=tcp",
+                        username="openrelayproject",
+                        credential="openrelayproject",
+                    ),
+                ]
+            )
+        )
         self.pcs.add(pc)
 
         video = SingleFrameStreamTrack()