stopRecord() {
    let that = this
    let token = fns.getStorage('token');
    console.log("开始")
    this.ctx.stopRecord({
      success: (res) => {
        console.log(res)
        
        wx.getFileSystemManager().readFile({
          filePath: res.tempVideoPath,
          encoding: 'base64', 
          success: (base) =>{
            console.log(base.data) // 
            net.request(urls.liveDetection,{videoStr:base.data}).then(res =>{
              console.log(res)
            }).catch(err =>{
              console.log(err)
            })
          }
        })
      }
    })

  },

结束录制以后，把视频转base64格式 传给后台

后台无法接受，用开发者工具调试 也一直掉线重连