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对招聘网站页面设计做建议,推广一般收多少钱,网站域名备案证书,网盟官方网站前言这里主要是来看一下海康视频的一个九宫格播放的需求然后在实际使用的过程中产生了一些问题, 比如增加一个视频, 应该只增量请求这一个视频的服务, 而一些实现下是全量请求了整个视频列表的服务另外就是全屏播放, 如果是自己写样式来实现全屏播放, 可能需要 …

前言

这里主要是来看一下海康视频的一个九宫格播放的需求

然后在实际使用的过程中产生了一些问题, 比如增加一个视频, 应该只增量请求这一个视频的服务, 而一些实现下是全量请求了整个视频列表的服务

另外就是全屏播放, 如果是自己写样式来实现全屏播放, 可能需要重新创建海康的player, 进而需要重新请求海康的视频服务

另外还有 cpu, 内存占用过高的情况, 然后还有一些疑似内存泄露的情况

这里调整一个版本记录一下

以下有一些版本, 一个是自定义实现九宫格, 这样做的问题还是挺多的, 以上的问题基本上都占了, 然后另外一个版本是直接使用海康自己提供的 api 来实现九宫格, 会稍微好一些

整体来说, 一个比较良好的情况是, 否则的话可能会出现一些较高的资源占用的问题

新增一个视频的时候, 仅仅增量请求这一个视频的数据, 增量的和海康建立连接
全屏的时候使用海康的 api, 它自己已经实现了自适应, 否则自己处理的话自适应有可能需要重新和海康建立连接, 重新渲染
尽量避免并发和请求海康的接口, 经常会崩溃, 尽量避免频繁的和海康断开视频连接, 重新创建视频连接

自己自定义九宫格

这个就相当于是海康的视频播放器只播放一个视频

然后这里是循环 codeUrlList, 一个视频对应于一个 player, 虽然同时播放了多个 player 但是实际上核心占用资源的貌似是其中一个

key 需要指定, 否则在一些需要重新渲染海康player 的场景下面, 模型改变了但是每一个 div 内部的 player 的 dom 不会重新渲染, 可能会导致视频错位等问题

这个问题就是需要自己实现全屏的样式, 以及全拼的时候需要全部重新渲染一次, 才能适应全屏之后的窗口

其他的增量的获取海康服务, 避免并发的请求海康接口就需要自己处理了

以下的测试代码看 (!singlePlayer) 部分

业务组件如下

<template><div class="indexDiv"><div v-if="!singlePlayer" v-for="item in codeUrlList" :key="item.code" style="width:400px; display: inline; float:left;"><Player :palyer-code="item.code" :play-url="item.url"></Player></div><PlayerSplitByHk ref="playerHk" v-if="singlePlayer"></PlayerSplitByHk><button @click="handleFullScreen" >全屏</button></div>
</template><script>import Player from "./Player.vue"
import PlayerSplitByHk from "./PlayerSplitByHk.vue"export default {name: "Index",components: {Player,PlayerSplitByHk,},data() {return {singlePlayer: false,codeUrlList: [{"code":"61092100561310001001","url":"ws://112.110.110.109/openUrl/KG6aIkE"},{"code":"61102600581328004001","url":"ws://112.110.110.109:559/openUrl/KHubaKc"},{"code":"61092200561310001001","url":"ws://112.110.110.109:559/openUrl/KIs4xbO"},{"code":"61092200561310001002","url":"ws://112.110.110.109:559/openUrl/KJcCKwo"},{"code":"61092200561310002701","url":"ws://112.110.110.109/openUrl/KK6g812"},{"code":"61092200561310001901","url":"ws://112.110.110.109:559/openUrl/KL11U1W"},{"code":"61092800561310002101","url":"ws://112.110.110.109:559/openUrl/KLJjkk0"},{"code":"61092800561310002402","url":"ws://112.110.110.109:559/openUrl/KMu98ME"},{"code":"61092800561310002901","url":"ws://112.110.110.109/openUrl/KNaIYik"}]};},mounted() {// test for hk sudokuif(this.singlePlayer) {this.$refs.playerHk.updateCodeUrlList(this.codeUrlList)// call updateCodeUrlList if codeUrlList updatedlet _this = thissetTimeout(function() {let updatedCodeUrlList = []_this.codeUrlList.map(ele => updatedCodeUrlList.push(ele))updatedCodeUrlList.splice(5, 3)_this.$refs.playerHk.updateCodeUrlList(updatedCodeUrlList)console.log(" splice with idx 6, 7, 8 ")console.log(" ----------------------------- ")}, 5000)setTimeout(function() {let updatedCodeUrlList = []_this.codeUrlList.map(ele => updatedCodeUrlList.push(ele))updatedCodeUrlList.splice(5, 3)updatedCodeUrlList.push({code: "code1", url: "url1"})updatedCodeUrlList.push({code: "code2", url: "url2"})_this.$refs.playerHk.updateCodeUrlList(updatedCodeUrlList)console.log(" push url1, url2 ")console.log(" ----------------------------- ")}, 10000)}},methods: {handleFullScreen() {// test for hk sudokuif(this.singlePlayer) {this.$refs.playerHk.handleFullScreen()}}}
}</script><style scoped></style>

视频播放组件如下

<template><div clas="outerDiv" ><div class="main" :id="'playerDiv' + this.palyerCode"  ></div></div>
</template><script>export default {name: "Player",props: {palyerCode: {type: String,default: "",},playUrl: {type: String,default: "",},},data() {return {player: null};},mounted() {this.createPlayer()this.startPlay()},methods: {createPlayer() {this.player = new window.JSPlugin({szId: 'playerDiv' + this.palyerCode,szBasePath: "./",iMaxSplit: 4,iCurrentSplit: 1,openDebug: true,oStyle: {borderSelect: '#000',}})// 事件回调绑定let _this = thisthis.player.JS_SetWindowControlCallback({windowEventSelect: function (iWndIndex) {  //插件选中窗口回调console.log('windowSelect callback: ', iWndIndex);_this.player.JS_Stop(iWndIndex).then(() => { console.log('stop play ' + iWndIndex + ' success') },e => { console.error(e) })},pluginErrorHandler: function (iWndIndex, iErrorpalyerCode, oError) {  //插件错误回调console.log('pluginError callback: ', iWndIndex, iErrorpalyerCode, oError);},windowFullCcreenChange: function (bFull) {  //全屏切换回调console.log('fullScreen callback: ', bFull);},firstFrameDisplay: function (iWndIndex, iWidth, iHeight) {  //首帧显示回调console.log('firstFrame loaded callback: ', iWndIndex, iWidth, iHeight);},performanceLack: function () {  //性能不足回调console.log('performanceLack callback: ');}});},startPlay() {let playURL = this.playUrllet model = 1console.log(" start replay with url : " + playURL)// this.player.JS_Play(playURL, { playURL, model }, 0).then(//     () => { console.log('realplay success') },//     e => { console.error(e) }// )}}
}</script><style scoped></style>

使用 hik 提供的 api 实现九宫格

这里的九宫格的实现就是直接基于 hk 的 api 了, 比如这里的 this.player.JS_ArrangeWindow, this.player.JS_Play

然后全屏基于 this.player.JS_FullScreenDisplay, 然后全拼的状态可以通过 windowFullCcreenChange 进行获取

一些常见的回调函数, 也在 demo 中有体现

然后降低客户端和海康服务器这边的开销的处理, 主要是如下的更新前后的视频列表, 如果目标索引的视频变了, 才重新发起请求, 重新建立视频连接

这样的话开始的时候点击九个视频, 资源占用大概是 cpu100%, 内存差不多是 500M 左右, 然后随着时间的推移, 主项目的js引擎[不是海康player的js引擎] 占用内存逐渐升高, 这个具体就得看这个 player 的问题了, 然后刷新 Index.vue 的页面, 这个内存占用依然存在

这里就不深究了

业务组件如下

<template><div class="indexDiv"><div v-if="!singlePlayer" v-for="item in codeUrlList" :key="item.code" style="width:400px; display: inline; float:left;"><Player :palyer-code="item.code" :play-url="item.url"></Player></div><PlayerSplitByHk ref="playerHk" v-if="singlePlayer"></PlayerSplitByHk><button @click="handleFullScreen" >全屏</button></div>
</template><script>import Player from "./Player.vue"
import PlayerSplitByHk from "./PlayerSplitByHk.vue"export default {name: "Index",components: {Player,PlayerSplitByHk,},data() {return {singlePlayer: false,codeUrlList: [{"code":"61092100561310001001","url":"ws://112.110.110.109/openUrl/KG6aIkE"},{"code":"61102600581328004001","url":"ws://112.110.110.109:559/openUrl/KHubaKc"},{"code":"61092200561310001001","url":"ws://112.110.110.109:559/openUrl/KIs4xbO"},{"code":"61092200561310001002","url":"ws://112.110.110.109:559/openUrl/KJcCKwo"},{"code":"61092200561310002701","url":"ws://112.110.110.109/openUrl/KK6g812"},{"code":"61092200561310001901","url":"ws://112.110.110.109:559/openUrl/KL11U1W"},{"code":"61092800561310002101","url":"ws://112.110.110.109:559/openUrl/KLJjkk0"},{"code":"61092800561310002402","url":"ws://112.110.110.109:559/openUrl/KMu98ME"},{"code":"61092800561310002901","url":"ws://112.110.110.109/openUrl/KNaIYik"}]};},mounted() {// test for hk sudokuif(this.singlePlayer) {this.$refs.playerHk.updateCodeUrlList(this.codeUrlList)// call updateCodeUrlList if codeUrlList updatedlet _this = thissetTimeout(function() {let updatedCodeUrlList = []_this.codeUrlList.map(ele => updatedCodeUrlList.push(ele))updatedCodeUrlList.splice(5, 3)_this.$refs.playerHk.updateCodeUrlList(updatedCodeUrlList)console.log(" splice with idx 6, 7, 8 ")console.log(" ----------------------------- ")}, 5000)setTimeout(function() {let updatedCodeUrlList = []_this.codeUrlList.map(ele => updatedCodeUrlList.push(ele))updatedCodeUrlList.splice(5, 3)updatedCodeUrlList.push({code: "code1", url: "url1"})updatedCodeUrlList.push({code: "code2", url: "url2"})_this.$refs.playerHk.updateCodeUrlList(updatedCodeUrlList)console.log(" push url1, url2 ")console.log(" ----------------------------- ")}, 10000)}},methods: {handleFullScreen() {// test for hk sudokuif(this.singlePlayer) {this.$refs.playerHk.handleFullScreen()}}}
}</script><style scoped></style>

视频播放组件如下

<template><div class="outerDiv" ><div class="main" id="playerDiv" ></div></div>
</template><script>export default {name: "PlayerSplitByHk",props: {},data() {return {player: null,videoListMax: 0,isFirstClick: false,codeUrlList: null,};},mounted() {this.createPlayer()},methods: {updateCodeUrlList(newCodeUrlList) {let oldCodeUrlList = this.codeUrlListthis.codeUrlList = newCodeUrlListthis.videoListMax = Math.max(this.videoListMax, newCodeUrlList.length)let matrixLen = newCodeUrlList.length > 4 ? 3 : (newCodeUrlList.length > 1 ? 2 : 1)this.isFirstClick = truethis.player.JS_ArrangeWindow(matrixLen)for(let i=newCodeUrlList.length; i<this.videoListMax; i++) {console.log(" stop replay with idx : " + i)this.player.JS_Stop(i);}for(let i=0; i<newCodeUrlList.length; i++) {let newItem = newCodeUrlList[i]let oldItem = oldCodeUrlList && oldCodeUrlList[i]if((!oldItem) || (oldItem.code !== newItem.code)) {this.startPlay(i)}}},handleFullScreen() {this.player.JS_FullScreenDisplay(true).then(() => { console.log(`wholeFullScreen success`) },e => { console.error(e) })},createPlayer() {this.player = new window.JSPlugin({szId: 'playerDiv',szBasePath: "/static",iMaxSplit: 9,iCurrentSplit: 1,iWidth: 400,iHeight: 300,openDebug: true,oStyle: {// border: '#green',// borderSelect: '#ffcc00',}})// 事件回调绑定let _this = thisthis.player.JS_SetWindowControlCallback({windowEventSelect: function (iWndIndex) {  //插件选中窗口回调if(_this.isFirstClick) {_this.isFirstClick = falsereturn ;}console.log(" do what you want ")},pluginErrorHandler: function (iWndIndex, iErrorpalyerCode, oError) {console.log('pluginError callback: ', iWndIndex, iErrorpalyerCode, oError);},windowFullCcreenChange: function (bFull) {console.log('fullScreen callback: ', bFull);},firstFrameDisplay: function (iWndIndex, iWidth, iHeight) {console.log('firstFrame loaded callback: ', iWndIndex, iWidth, iHeight);},performanceLack: function () {console.log('performanceLack callback: ');}});},startPlay(idx) {let playURL = this.codeUrlList[idx].urllet model = 1console.log(" start replay with idx : " + idx)// this.player.JS_Play(playURL, { playURL, model }, idx).then(//     () => { console.log('realplay success') },//     e => { console.error(e) }// )}}
}</script><style scoped></style>

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