LiveGBS中GB28181协议摄像头语音对讲前端采集代码

GB28181流媒体服务搭建：https://www.liveqing.com/docs/download/LiveGBS.html

代码示例

在vue中，利用websocket进行高性能的GB28181语音对讲前端代码

    ......
    talkStart(e) {
      if(!this.ws) {
        var ws = new WebSocket(this.wsTalkURL());
        ws.onopen = evt => {
          console.log("ws talk open");
          this.ws = ws;
        }
        ws.onclose = evt => {
          console.log("ws talk close");
        }
        ws.onerror = evt => {
          console.log("ws talk error", evt);
        }
      }
      var $target = $(e.currentTarget);
      if(this.recorder) {
        $target.addClass("active");
        this.recorder.start();
        return;
      }
      LiveRecorder.get((rec, err) => {
        if(err) {
          alert(err);
          return
        }
        // this.$refs["player"].setMuted(true);
        $target.addClass("active");
        this.recorder = rec;
        this.recorder.start();
      }, {
        sampleBits: 16,
        sampleRate: 8000,
        pcmCallback: pcm => {
          // binary to base64 string
          var reader = new window.FileReader();
          reader.onloadend = () => {
            var base64 = reader.result;
            var base64 = base64.split(',')[1];
            if(this.ws) {
              this.ws.send(base64);
            }
          }
          reader.readAsDataURL(pcm);
        }
      })
    },
    talkStop() {
      if(this.recorder) {
        this.recorder.stop();
        // this.recorder = null;
        $(this.$el).find(".fa-microphone.active").removeClass("active");
        // this.$refs["player"].setMuted(false);
      }
      if(this.ws) {
        this.ws.close();
        this.ws = null;
      }
    }, 
  ......