vue + typescript + video.js实现流媒体播放视频监控功能

来源：jb51　　时间：2019/7/8 8:30:34　　对本文有异议

视频才用流媒体，有后台实时返回数据，要支持flash播放，所以需安装对应的flash插件。当视频播放时，每间隔3秒向后台发送请求供检测心跳，表明在线收看状态,需要后台持续发送视频数据。

1. yarn add video.js videojs-flash

2. 创建videp.js声明文件

3. 创建video_player.vue组件，供外部调用。源码如下

<script lang="ts">
import { Component, Emit, Prop, Vue } from 'vue-property-decorator';
 
import 'video.js/dist/video-js.css';
 
import _videojs from 'video.js';
const videojs = (window as any).videojs || _videojs;
import 'videojs-flash';
 
 
@Component({
 name: 'video-player',
})
export default class VideoPlayer extends Vue {
 /* ------------------------ INPUT & OUTPUT ------------------------ */
 @Prop({ type: Object, default: () => {}}) private options!: object;
 
 /* ------------------------ VUEX (vuex getter & vuex action) ------------------------ */
 
 /* ------------------------ LIFECYCLE HOOKS (created & mounted & ...) ------------------------ */
 private mounted() {
  this.player = videojs(this.$refs.videoPlayer, this.options, function onPlayerReady() {
   // console.log('onPlayerReady');
  });
 }
 
 private beforeDestroy() {
  if (this.player) {
   this.player.dispose();
  }
 }
 /* ------------------------ COMPONENT STATE (data & computed & model) ------------------------ */
 private player: any;
 
 /* ------------------------ WATCH ------------------------ */
 
 /* ------------------------ METHODS ------------------------ */
}
 
</script>
 
<template>
<div class="module_video_player">
 <video ref="videoPlayer" class="video-js" autoplay></video>
</div>
</template>
 
<style lang="stylus" scoped>
@import '~@/assets/styles/var.styl';
 
.module_video_player
 position relative
 width 780px
 
</style>

4. 在需要使用的模块（如show_monitor.vue）调用。组件创建后，向后台发送轻轻获取rtmp视频播放地址，并更新videoOptions中的src。触发video_player的创建、挂载等。

import VideoPlayer from '@/components/video_player.vue';
 
components: {
 VideoPlayer,
}
 
 private videoOptions = {
  techOrder: ['flash', 'html5'],
  sourceOrder: true,
  flash: {
   hls: { withCredentials: false },
  },
  html5: { hls: { withCredentials: false } },
  sources: [{
   type: 'rtmp/flv',
   src: '', // 'rtmp://live.hkstv.hk.lxdns.com/live/hks2', // 香港卫视，可使用此地址测试
  }],
  autoplay: true,
  controls: true,
  width: '778',
  height: '638',
 };
<video-player :options="videoOptions" v-if="videoOptions.sources[0].src !== ''"></video-player>

5. 心跳检测

在show_monitor.vue创建时，新建定时器，每隔3秒向后台发送一个包含当前监控设备id的请求，告知后台此设备监控被调用播放。show_monitor.vue销毁时，清空定时器，后台将停止传输视频数据。

private intervalFunc: any;
 
private created() {
 // ****
 this.intervalFunc = setInterval(() => {
  EquipmentService.monitor_continue_test(this.eqmtid);
 }, 3000);
}
 
private destroyed() {
 clearInterval(this.intervalFunc);
}