​LeetCode 热题100-13 最大子数组和​

先阐述一下问题，在项目中用到腾讯云的TRTC，A端发布A1、A2两个视频源，在B端订阅A1、A2使用两个view进行播放渲染

问题主流视频源和辅流视频源渲染在同一view上，控制台报错

// 播放远端视频 TRTCService.js;
setRemoteVideo(view) {
  this.trtcSdk.on(TRTC.EVENT.REMOTE_VIDEO_AVAILABLE, (event) => {
    if (event.streamType === TRTC.TYPE.STREAM_TYPE_MAIN) {
      console.log("开启主流视频源", view);
      this.trtcSdk.startRemoteVideo({
        userId: event.userId,
        streamType: event.streamType,
        view,
      });
    } else if (event.streamType === TRTC.TYPE.STREAM_TYPE_SUB) {
      console.log("开启辅流视频源", view);
      this.trtcSdk.startRemoteVideo({
        userId: event.userId,
        streamType: event.streamType,
        view,
      });
    }
  });
}

// vue组件中调用
this.setRemoteVideo(this.el_scan),
this.setRemoteVideo(this.el_other),

监听订阅远端视频事件里判断主流和辅流传不同的view实例，运行结果是主流和辅流视频渲染在同一个view上，控制台报错如下：

问题原因：

解决这个问题的步骤如下：

代码如下：

setRemoteVideo(view) {
  // 移除之前的监听器，防止重复监听
  this.trtcSdk.off(TRTC.EVENT.REMOTE_VIDEO_AVAILABLE);
  
  this.trtcSdk.on(TRTC.EVENT.REMOTE_VIDEO_AVAILABLE, (event) => {
    if (view === this.el_scan && event.streamType === TRTC.TYPE.STREAM_TYPE_MAIN) {
      console.log("开启主流视频源");
      this.trtcSdk.startRemoteVideo({
        userId: event.userId,
        streamType: event.streamType,
        view,
      });
    } else if (view === this.el_other && event.streamType === TRTC.TYPE.STREAM_TYPE_SUB) {
      console.log("开启辅流视频源");
      this.trtcSdk.startRemoteVideo({
        userId: event.userId,
        streamType: event.streamType,
        view,
      });
    }
  });
}

运行结果：

继续分析：

继续尝试：

代码如下：

setRemoteVideoMain(viewMain) {
 this.trtcSdk.on(TRTC.EVENT.REMOTE_VIDEO_AVAILABLE, (event) => {
    if (event.streamType === TRTC.TYPE.STREAM_TYPE_MAIN) {
      console.log("开启主流视频源");
      this.trtcSdk.startRemoteVideo({
        userId: event.userId,
        streamType: event.streamType,
        view: viewMain,
      });
    }
  });
}
setRemoteVideoSub(viewSub) {
  this.trtcSdk.on(TRTC.EVENT.REMOTE_VIDEO_AVAILABLE, (event) => {
    if (event.streamType === TRTC.TYPE.STREAM_TYPE_SUB) {
      console.log("开启辅流视频源");
      this.trtcSdk.startRemoteVideo({
        userId: event.userId,
        streamType: event.streamType,
        view: viewSub,
      });
    }
  });
}


// 组件中调用
this.setRemoteVideoSub(this.el_scan),
this.setRemoteVideoMain(this.el_other),

完美解决问题，主流和辅流视频源渲染在指定的位置