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RTCPeerConnection 连接状态永远不会从“新”移动到“检查”/“已连接”

我已经从某人那里接手了一个 WebRTC 项目，尽管我开始理解这些概念，但我仍然被一个特定问题所困扰：将 WebRTC 连接从/new移至/等......checkingcompleted

这是的输出范围chrome://webrtc-internals：

我们的代码调用connect()：

connect(mediaStream, interviewUid, applicantUid) {
    return new Promise((resolve, reject) => {
      this.connectRtcPeerConnection()
        .then(() => {
          this.connectionState = Socket.CONNECTION_STATES.connected;
          this.rtcPeer.addStream(mediaStream);
          return this.rtcPeer.createOffer({ offerToReceiveAudio: 1, offerToReceiveVideo: 1 });
        }).then((offer) => {
          console.log('offer created', offer);
          return this.rtcPeer.setLocalDescription(offer);
        }).then(() => {
          const message = {
            id: SENDABLE_MESSAGES.connect,
            sdpOffer: this.rtcPeer.localDescription,
            interviewUid,
            applicantUid,
          };
          this.sendMessageToServer(message);
          resolve();
        })
        .catch((error) => {
          console.error(error);
          reject();
        });
    });
  }

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这又调用connectRtcPeerConnection()：

connectRtcPeerConnection(