update example.

Author: cloudwebrtc

lib/src/rtc_video_element.dart

@@ -1,7 +1,6 @@
 import 'dart:html' as html;
 
 import '../dart_webrtc.dart';
-import 'media_stream_impl.dart';
 
 class RTCVideoElement {
   RTCVideoElement() {
@@ -61,4 +60,6 @@ class RTCVideoElement {
   void load() => _html.load();
 
   void removeAttribute(String name) => _html.removeAttribute(name);
+
+  Future<void> setSinkId(String sinkId) => _html.setSinkId(sinkId);
 }

web/main.dart

@@ -37,12 +37,15 @@ void loopBackTest() async {
   list.forEach((e) {
     print('${e.runtimeType}: ${e.label}, type => ${e.kind}');
   });
-
-  await navigator.mediaDevices.selectAudioOutput(AudioOutputOptions(
-      deviceId: list
-          .where((element) => element.kind == 'audiooutput')
-          .last
-          .deviceId));
+  var sinkId =
+      list.where((element) => element.kind == 'audiooutput').last.deviceId;
+  try {
+    await navigator.mediaDevices
+        .selectAudioOutput(AudioOutputOptions(deviceId: sinkId));
+  } catch (e) {
+    print('selectAudioOutput error: ${e.toString()}');
+    await localVideo.setSinkId(sinkId);
+  }
 
   var pc = await createPeerConnection({});
   pc.onAddStream = (MediaStream stream) {};