peerConnection can not addStream or createOffer

[123zzl321]

the peerConnection that i create is not null. but i get logs below.how to solve this problem,can you help me.

E/flutter ( 5051): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exc eption: PlatformException(peerConnectionAddStreamFailed, peerConnectionAddStream() peerConnection is null, null)
E/flutter ( 5051): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:564:7)
E/flutter ( 5051): #1 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:302:33)
E/flutter ( 5051):
E/flutter ( 5051): #2 RTCPeerConnection.addStream (package:flutter_webrtc/rtc_peerconnection.dart:253:20)
E/flutter ( 5051):
E/flutter ( 5051): #3 RTCSignaling._createPeerConnection (package:zzlrtc/rtc_signaling.dart:251:10)
E/flutter ( 5051):
E/flutter ( 5051): #4 RTCSignaling.invite (package:zzlrtc/rtc_signaling.dart:316:5)
E/flutter ( 5051): #5 _P2PDemoState._invitePeer (package:zzlrtc/p2p_demo.dart:130:17)
E/flutter ( 5051):
E/flutter ( 5051): #6 _P2PDemoState._buildRow. (package:zzlrtc/p2p_demo.dart:162:17)
E/flutter ( 5051): #7 _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:511:14)
E/flutter ( 5051): #8 _InkResponseState.build. (package:flutter/src/material/ink_well.dart:566:30)
E/flutter ( 5051): #9 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:166:24)
E/flutter ( 5051): #10 TapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:240:9)
E/flutter ( 5051): #11 TapGestureRecognizer.acceptGesture (package:flutter/src/gestures/tap.dart:211:7)
E/flutter ( 5051): #12 GestureArenaManager.sweep (package:flutter/src/gestures/arena.dart:156:27)
E/flutter ( 5051): #13 _WidgetsFlutterBinding&BindingBase&GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:225:20)
E/flutter ( 5051): #14 _WidgetsFlutterBinding&BindingBase&GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:199:22)
E/flutter ( 5051): #15 _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7)
E/flutter ( 5051): #16 _WidgetsFlutterBinding&BindingBase&GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7)
E/flutter ( 5051): #17 _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7)
E/flutter ( 5051): #18 _rootRunUnary (dart:async/zone.dart:1136:13)
E/flutter ( 5051): #19 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
E/flutter ( 5051): #20 _CustomZone.runUnaryGuarded (dart:async/zone.dart:931:7)
E/flutter ( 5051): #21 _invoke1 (dart:ui/hooks.dart:233:10)
E/flutter ( 5051): #22 _dispatchPointerDataPacket (dart:ui/hooks.dart:154:5)
E/flutter ( 5051):
E/flutter ( 5051): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: Unable to RTCPeerConnection::createOffer: peerConnection is null
E/flutter ( 5051): #0 RTCPeerConnection.createOffer (package:flutter_webrtc/rtc_peerconnection.dart:230:7)
E/flutter ( 5051):
E/flutter ( 5051): #1 RTCSignaling._createOffer (package:zzlrtc/rtc_signaling.dart:215:43)
E/flutter ( 5051):
E/flutter ( 5051): #2 RTCSignaling.invite. (package:zzlrtc/rtc_signaling.dart:322:7)
E/flutter ( 5051): #3 _rootRunUnary (dart:async/zone.dart:1132:38)
E/flutter ( 5051): #4 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
E/flutter ( 5051): #5 _FutureListener.handleValue (dart:async/future_impl.dart:126:18)
E/flutter ( 5051): #6 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:639:45)
E/flutter ( 5051): #7 Future._propagateToListeners (dart:async/future_impl.dart:668:32)
E/flutter ( 5051): #8 Future._complete (dart:async/future_impl.dart:473:7)
E/flutter ( 5051): #9 _SyncCompleter.complete (dart:async/future_impl.dart:51:12)
E/flutter ( 5051): #10 _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:28:18)
E/flutter ( 5051): #11 _completeOnAsyncReturn (dart:async-patch/async_patch.dart:294:13)
E/flutter ( 5051): #12 RTCSignaling._createPeerConnection (package:zzlrtc/rtc_signaling.dart)
E/flutter ( 5051): #13 _asyncThenWrapperHelper. (dart:async-patch/async_patch.dart:77:64)
E/flutter ( 5051): #14 _rootRunUnary (dart:async/zone.dart:1132:38)
E/flutter ( 5051): #15 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
E/flutter ( 5051): #16 _FutureListener.handleValue (dart:async/future_impl.dart:126:18)
E/flutter ( 5051): #17 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:639:45)
E/flutter ( 5051): #18 Future._propagateToListeners (dart:async/future_impl.dart:668:32)
E/flutter ( 5051): #19 Future._complete (dart:async/future_impl.dart:473:7)
E/flutter ( 5051): #20 _SyncCompleter.complete (dart:async/future_impl.dart:51:12)
E/flutter ( 5051): #21 _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:28:18)
E/flutter ( 5051): #22 _completeOnAsyncReturn (dart:async-patch/async_patch.dart:294:13)
E/flutter ( 5051): #23 createPeerConnection (package:flutter_webrtc/rtc_peerconnection_factory.dart)
E/flutter ( 5051): #24 _asyncThenWrapperHelper. (dart:async-patch/async_patch.dart:77:64)
E/flutter ( 5051): #25 _rootRunUnary (dart:async/zone.dart:1132:38)
E/flutter ( 5051): #26 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
E/flutter ( 5051): #27 _FutureListener.handleValue (dart:async/future_impl.dart:126:18)
E/flutter ( 5051): #28 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:639:45)
E/flutter ( 5051): #29 Future._propagateToListeners (dart:async/future_impl.dart:668:32)
E/flutter ( 5051): #30 Future._complete (dart:async/future_impl.dart:473:7)
E/flutter ( 5051): #31 _SyncCompleter.complete (dart:async/future_impl.dart:51:12)
E/flutter ( 5051): #32 _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:28:18)
E/flutter ( 5051): #33 _completeOnAsyncReturn (dart:async-patch/async_patch.dart:294:13)
E/flutter ( 5051): #34 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart)
E/flutter ( 5051): #35 _asyncThenWrapperHelper. (dart:async-patch/async_patch.dart:77:64)
E/flutter ( 5051): #36 _rootRunUnary (dart:async/zone.dart:1132:38)
E/flutter ( 5051): #37 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
E/flutter ( 5051): #38 _FutureListener.handleValue (dart:async/future_impl.dart:126:18)
E/flutter ( 5051): #39 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:639:45)
E/flutter ( 5051): #40 Future._propagateToListeners (dart:async/future_impl.dart:668:32)
E/flutter ( 5051): #41 Future._completeWithValue (dart:async/future_impl.dart:483:5)
E/flutter ( 5051): #42 Future._asyncComplete. (dart:async/future_impl.dart:513:7)
E/flutter ( 5051): #43 _rootRun (dart:async/zone.dart:1124:13)
E/flutter ( 5051): #44 _CustomZone.run (dart:async/zone.dart:1021:19)
E/flutter ( 5051): #45 _CustomZone.runGuarded (dart:async/zone.dart:923:7)
E/flutter ( 5051): #46 _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:963:23)
E/flutter ( 5051): #47 _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
E/flutter ( 5051): #48 _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)

[binghandsom]

I got the same error,actually struggled for 2 days,nothing processed.first i run my own app has this error next,I run the example code still this error.below is my terminal error log:
E/flutter (23955): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: PlatformException(peerConnectionAddStreamFailed, peerConnectionAddStream() peerConnection is null, null)
E/flutter (23955): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:569:7)
E/flutter (23955): #1 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:321:33)
E/flutter (23955):
E/flutter (23955): #2 RTCPeerConnection.addStream (package:flutter_webrtc/rtc_peerconnection.dart:243:20)
E/flutter (23955): #3 Signaling._createPeerConnection (package:social_app/ui/pages/chat/rtc/signaling.dart:331:29)
E/flutter (23955):
E/flutter (23955): #4 Signaling.invite (package:social_app/ui/pages/chat/rtc/signaling.dart:126:5)
E/flutter (23955): #5 _VoiceMatchState._invitePeer (package:social_app/ui/pages/chat/match/voice_match.dart:152:18)
E/flutter (23955): #6 _VoiceMatchState._connectSignalServer. (package:social_app/ui/pages/chat/match/voice_match.dart:122:9)
E/flutter (23955): #7 Signaling.startMatch. (package:social_app/ui/pages/chat/rtc/signaling.dart:429:16)
E/flutter (23955): #8 MyDio._requstHttp (package:social_app/common/network/my_dio.dart:178:22)
E/flutter (23955):
E/flutter (23955): #9 MyDio.get (package:social_app/common/network/my_dio.dart:52:5)
E/flutter (23955): #10 Signaling.startMatch (package:social_app/ui/pages/chat/rtc/signaling.dart:422:25)
E/flutter (23955): #11 _VoiceMatchState.build. (package:social_app/ui/pages/chat/match/voice_match.dart:43:28)
E/flutter (23955): #12 _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:706:14)
E/flutter (23955): #13 _InkResponseState.build. (package:flutter/src/material/ink_well.dart:789:36)
E/flutter (23955): #14 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24)
E/flutter (23955): #15 TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:486:11)
E/flutter (23955): #16 BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:264:5)
E/flutter (23955): #17 BaseTapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:199:7)
E/flutter (23955): #18 PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:467:9)
E/flutter (23955): #19 PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:76:12)
E/flutter (23955): #20 PointerRouter._dispatchEventToRoutes. (package:flutter/src/gestures/pointer_router.dart:117:9)
E/flutter (23955): #21 _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:379:8)
E/flutter (23955): #22 PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:115:18)
E/flutter (23955): #23 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:101:7)
E/flutter (23955): #24 GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:218:19)
E/flutter (23955): #25 GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:198:22)
E/flutter (23955): #26 GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7)
E/flutter (23955): #27 GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7)
E/flutter (23955): #28 GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7)
E/flutter (23955): #29 _rootRunUnary (dart:async/zone.dart:1138:13)
E/flutter (23955): #30 _CustomZone.runUnary (dart:async/zone.dart:1031:19)
E/flutter (23955): #31 _CustomZone.runUnaryGuarded (dart:async/zone.dart:933:7)
E/flutter (23955): #32 _invoke1 (dart:ui/hooks.dart:273:10)
E/flutter (23955): #33 _dispatchPointerDataPacket (dart:ui/hooks.dart:182:5)
E/flutter (23955):
I/flutter (23955): Unable to RTCPeerConnection::createOffer: peerConnection is null

[binghandsom]

@123zzl321 Have you came through this error.I think this is a bug of fultter_webrtc framework

[binghandsom]

@123zzl321 Now I find that when I change the iceServers config as it was this error don‘t occur，so it is very likely due to my setting of iceServers.Hope this can help you.

[123zzl321]

leave your email address i'll send source code to you

[123zzl321]

@binghandsom

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.