javascript - 将媒体流绑定到带有 JsSIP 错误媒体描述的元素

Question

我一直在尝试使用 制作一个简单的视频通话界面JsSIP，到目前为止，我只设法启动了一个视频通话，并且接收者获取了我的音频和视频流，但是当我尝试添加流时（本地或远程) 到<video>我页面中的一个元素，我得到了错误"Bad Media Description"。

我的代码是这样的：

    const address = "my.address.com";
    const pass = "pass";
    const callee = "id2";
    const user = "id1";
    const sockets = [];
    const localStream = new MediaStream();
    const config = {
      sockets: sockets,
      uri: `sip:${user}@${address}`,
      password: pass
    };
        const agent = new JsSIP.UA(config);
    const servers = {
      iceServers: [
        {urls:"stun:stun.l.google.com:19302"}
      ]
    };
    const options = {
      pcConfig: servers,
      mediaConstraints: {
        audio: true,
        video: true
      }
    };
    
    document.getElementById("localVideo").srcObject = localStream;
    document.getElementById("buttonCall").addEventListener("click", call);
    
    sockets.push(
      new JsSIP
      .WebSocketInterface(`wss://${address}:443/ws`)
    );
    
    agent.start();
    
        agent.on("newRTCSession", function(data){
          let dataSession = data.session;
          
          dataSession.on("confirmed",function(e){
            let localTracks = dataSession.connection.getSenders();
            localStream.addTrack(localTracks[0].track);
            localStream.addTrack(localTracks[1].track);
            console.log(e);
            document.getElementById("localVideo").play();
          });
        });
        function call() {
            agent
            .call(
            `sip:${callee}@${address}`,
            options
            );
        }

如果有人能指出使这成为可能的正确方法，我将不胜感激。

Answer 1

我已经解决了，我的问题是我使用的是 Vue，所以通过function在我的mounted()函数中包含 s 引用this被覆盖，解决方案是function通过箭头函数更改那些 s ，() => {}如下所示：

    agent.on("newRTCSession", (data) => {
      let dataSession = data.session;
      
      dataSession.on("confirmed", () => {
        let localTracks = dataSession.connection.getSenders();
        localStream.addTrack(localTracks[0].track);
        localStream.addTrack(localTracks[1].track);
        console.log(e);
        this.$refs.localVideo.play();
      });
    });