flv.js在vue中的使用方法
作者:irisMoon06
Flv.js 是 HTML5 Flash 视频(FLV)播放器,纯原生 JavaScript 开发,没有用到 Flash。由 bilibili 网站开源。它的工作原理是将 FLV 文件流转码复用成 ISO BMFF(MP4 碎片)片段,然后通过 Media Source Extensions 将 MP4 片段喂进浏览器。
使用方法
<template> <div class="video" :style="{ height: voidHeight }"> <video ref="videoElement" muted controls autoplay controlslist="nodownload noplaybackrate noremoteplayback" disablePictureInPicture="true" v-if="!imgError"></video> <div class="img_error" v-if="imgError"> <p>无法连接相关设备</p> </div> </div> </template> <script> import flvjs from "flv.js"; export default { name: "assemblyFlv", props: ["url", "height", "destroy","playon"], // 视频流路径,播放器高度,是否销毁播放器 data() { return { flvPlayer: "", imgError: false, voidHeight: "", playOn:true }; }, mounted() { // 判断是否传入高度,如果没有,高度100% this.height ? (this.voidHeight = this.height) : (this.voidHeight = "100%"); // 页面加载完成后,初始化 this.$nextTick(() => { this.init(this.url); }); }, methods: { // 初始化 init(source) { if (flvjs.isSupported()) { this.flvPlayer = flvjs.createPlayer( { type: "flv", url: source, isLive: true, }, { enableWorker: false, //不启用分离线程 enableStashBuffer: false, //关闭IO隐藏缓冲区 reuseRedirectedURL: true, //重用301/302重定向url,用于随后的请求,如查找、重新连接等。 autoCleanupSourceBuffer: true, //自动清除缓存 } ); var videoElement = this.$refs.videoElement; this.flvPlayer.attachMediaElement(this.$refs.videoElement); if (this.url !== "" && this.url !== null) { this.flvPlayer.load(); //this.flvPlayer.play(); setTimeout(() => { this.flvPlayer.play(); }, 100); // 加载完成 this.flvPlayer.on(flvjs.Events.LOADING_COMPLETE, () => { this.imgError = false; }); // 加载失败 this.flvPlayer.on( flvjs.Events.ERROR, () => { if (this.flvPlayer) { this.reloadVideo(this.flvPlayer); }else{ this.imgError = true; } }, (error) => { console.log(error); } ); this.flvPlayer.on(flvjs.Events.STATISTICS_INFO, (res) =>{ if(this.playon != false){ if (this.lastDecodedFrame == 0) { this.lastDecodedFrame = res.decodedFrames; console.log(this.lastDecodedFrame) return; } if (this.lastDecodedFrame != res.decodedFrames) { this.lastDecodedFrame = res.decodedFrames; } else { this.lastDecodedFrame = 0; console.log('卡住重连') if (this.flvPlayer) { this.reloadVideo(this.flvPlayer); console.log('卡住重连完成') } } } }); videoElement.addEventListener("progress", () => { if(videoElement.buffered.length != 0){ let end = videoElement.buffered.end(0); //获取当前buffered值(缓冲区末尾) let delta = end - videoElement.currentTime; //获取buffered与当前播放位置的差值 // 延迟过大,通过跳帧的方式更新视频 if (delta > 10 || delta < 0) { this.flvPlayer.currentTime = this.flvPlayer.buffered.end(0) - 1; console.log('跳帧') return; } // 追帧 if (delta > 1) { videoElement.playbackRate = 1.1; console.log('追帧') } else { videoElement.playbackRate = 1; console.log('正常') } } }); // 点击播放按钮后,更新视频 videoElement.addEventListener("play", () => { if(videoElement.buffered.length > 0){ let end = videoElement.buffered.end(0) - 1; this.flvPlayer.currentTime = end; console.log('播放最新') } }); // 网页重新激活后,更新视频 window.onfocus = () => { if(videoElement.buffered.length > 0){ let end1 = videoElement.buffered.end(0) - 1; this.flvPlayer.currentTime = end1; console.log('页面切换') } }; } } else { this.imgError = true; } }, //断线重连 reloadVideo(flvPlayer) { this.detachMediaElement(); this.init(this.url); console.log('断线重连') }, // 销毁 detachMediaElement() { this.flvPlayer.pause(); this.flvPlayer.unload(); this.flvPlayer.detachMediaElement(); this.flvPlayer.destroy(); this.flvPlayer = ""; }, }, watch: { url() { this.imgError = false; // 切换流之前,判断之前的流是否销毁 this.flvPlayer == "" ? "" : this.detachMediaElement(); // 初始化 this.init(this.url); }, destroy() { // 传入开关值 if (this.destroy) { this.init(this.url); } else { this.flvPlayer == "" ? "" : this.detachMediaElement(); } }, playon() { this.reloadVideo(this.flvPlayer); } }, beforeDestroy() { this.detachMediaElement(); }, }; </script> <style scoped> .video { position: relative; height: 100%; } .video video { width: 100%; height: 100%; object-fit: fill; } .video video::-webkit-media-controls-play-button{ display: none; } .video video::-webkit-media-controls-toggle-closed-captions-button { display: none; } .video video::-webkit-media-controls-timeline { display: none; } .video video::-webkit-media-controls-current-time-display { display: none; } .video video::-webkit-media-controls-time-remaining-display { display: none; } .img_error { position: absolute; top: 30%; left: 50%; margin-left: -120px; text-align: center; } .img_error > img { margin-bottom: 1em; } .img_error > p { color: #00fdff; font-weight: bold; font-size: 1.2em; } </style>
封装:
子组件封装:
<template> <div class="video-container"> <video ref="videoElement" class="centeredVideo" controls autoplay muted></video> </div> </template> <script> import flvjs from "flv.js"; //引入flv export default { props: { url : String, }, data() { return { // src: ["http://172.21.1.111/live?port=1935&app=myapp&stream=streamname"], }; }, mounted() { this.flv_load(this.url); }, methods: { flv_load(url) { if (flvjs.isSupported()) { let videoElement = this.$refs.videoElement; this.flvPlayer = flvjs.createPlayer( { type: "flv", //媒体类型 url: url, //flv格式媒体URL isLive: true, //数据源是否为直播流 hasAudio: false, //数据源是否包含有音频 hasVideo: true, //数据源是否包含有视频 enableStashBuffer: false, //是否启用缓存区 }, { enableWorker: false, // 是否启用分离的线程进行转换 enableStashBuffer: false, //关闭IO隐藏缓冲区 autoCleanupSourceBuffer: true, //自动清除缓存 } ); this.flvPlayer.attachMediaElement(videoElement); //将播放实例注册到节点 this.flvPlayer.load(); //加载数据流 this.flvPlayer.play(); //播放数据流 } }, }, }; </script> <style scoped> /* .video-container { display: inline-block; margin-right: 10px; width: 32%; height: 45%; } */ .centeredVideo { width: 100%; } </style>
父组件调用:
<template> <el-card class="box-card"> <div class="flvbox" v-for="(item,index) in src" :key="index"> <!-- <VideoFlv url="http://172.21.1.111/live?port=1935&app=myapp&stream=streamname" /> --> <VideoFlv :url="item" /> </div> </el-card> </template> <script> import VideoFlv from "./VideoFlv.vue"; export default { components:{ VideoFlv }, data() { return { src: [ "https://sf1-hscdn-tos.pstatp.com/obj/media-fe/xgplayer_doc_video/flv/xgplayer-demo-360p.flv", "https://sf1-hscdn-tos.pstatp.com/obj/media-fe/xgplayer_doc_video/flv/xgplayer-demo-360p.flv", "https://sf1-hscdn-tos.pstatp.com/obj/media-fe/xgplayer_doc_video/flv/xgplayer-demo-360p.flv", "https://sf1-hscdn-tos.pstatp.com/obj/media-fe/xgplayer_doc_video/flv/xgplayer-demo-360p.flv", "http://172.21.1.111/live?port=1935&app=myapp&stream=streamname", "https://sf1-hscdn-tos.pstatp.com/obj/media-fe/xgplayer_doc_video/flv/xgplayer-demo-360p.flv", ], }; }, }; </script> <style scoped> .flvbox { display: inline-block; margin-right: 10px; width: 32%; } </style>
因为视频需要实时的 后边发现上边写法暂停之后和切换页面之后 会有延迟 所以开发让新加个刷新按钮 也已满足 然后这个api的写法我尝试很多 追帧啊 更新视频啊 都没生效 父组件重新传值 因为值没有变化 所以也没有重新渲染 所以用到了key 属性 vue每次渲染的时候会去拿这个key 值做对比,如果这一次的key 值和上一次的key值是不一样的才会重新渲染dom 元素,否则保持上一次的元素状态。所以我用了一个时间戳方法
flv.js常用方法
1:flvjs.isSupported():判断当前浏览器是否支持播放
2:flvPlayer = flvjs.createPlayer(mediaDataSource: MediaDataSource, config?: Config):创建一个播放实例
3:flvPlayer.attachMediaElement(mediaElement: HTMLMediaElement):将播放实例注册到video节点
4:flvPlayer.load():加载数据流
5:flvPlayer.play():播放数据流
6:flvPlayer.pause():暂停播放数据流
7:flvPlayer.unload():取消数据流加载
8:flvPlayer.detachMediaElement():将播放实例从节点中取出
9:flvPlayer.destroy():销毁播放实例
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