Flutter WebRTC中RTCPeerConnection.addStream失效问题求助

报错提示AddStream is not available with Unified Plan SdpSemantics. Please use AddTrack instead.是因为Unified Plan SDP语义已废弃addStream方法，必须改用addTrack逐个添加媒体轨道。

修改步骤： #

• 删除原代码中的pc.addStream(_localStream!);
• 遍历本地流的所有媒体轨道，通过addTrack添加到PeerConnection

修改后的完整代码： #

Map<String, dynamic> configuration = {
  "iceServers": [
    {"url": "stun:stun1.l.google.com:19302"},
  ]
};
final Map<String, dynamic> offerSdpConstraints = {
  "mandatory": {
    "OfferToReceiveAudio": true,
    "OfferToReceiveVideo": true,
  },
  'optional': [
    {'DollsSftpKeyAgreement': true},
  ],
};

Map<String,dynamic> mediaConstraints = {
  'audio': true,
  'video': true,
};
_localStream = await navigator.mediaDevices.getUserMedia(mediaConstraints);
_localRenderer.srcObject = _localStream;


RTCPeerConnection pc = await createPeerConnection(configuration,offerSdpConstraints);
// 替换原addStream方法
_localStream!.getTracks().forEach((track) {
  pc.addTrack(track, _localStream!);
});

内容的提问来源于stack exchange，提问作者EbrahimAghdasi