WebRtc don't playe

[tazik561]

I try to test your example , But when I choose WebRTC nothing is played? this link webrtc://d.ossrs.net/live/livestream

This is result:

I/flutter (13957): Url webrtc://d.ossrs.net/live/livestream parsed to api=https://d.ossrs.net:443/rtc/v1/play/, stream=webrtc://d.ossrs.net/live/livestream
I/org.webrtc.Logging(13957): NetworkMonitorAutoDetect: link properties changed
D/FlutterWebRTCPlugin(13957): onIceCandidate
I/chatty  (13957): uid=10136(net.ossrs.flutter_live_example) signaling_threa identical 6 lines
D/FlutterWebRTCPlugin(13957): onIceCandidate
D/FlutterWebRTCPlugin(13957): onIceGatheringChangeCOMPLETE
I/flutter (13957): WebRTC request: https://d.ossrs.net:443/rtc/v1/play/ offer=3167B
I/flutter (13957): WebRTC reply: 12B, 200
E/flutter (13957): [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: {"code":400}
E/flutter (13957):
I/org.webrtc.Logging(13957): EglRenderer: Duration: 4004 ms. Frames received: 0. Dropped: 0. Rendered: 0. Render fps: .0. Average render time: NA. Average swapBuffer time: NA.