video.js支持m3u8格式直播的实现示例
为什么要使用video.js?
1. PC端浏览器并不支持video直接播放m3u8格式的视频
2. 手机端各式各样的浏览器定制的video界面风格不统一,直接写原生的js控制视频兼容性较差
3. video.js解决以上两个问题,还可以有各种视频状态接口暴露,优化体验
核心代码:
<!DOCTYPE html> <html> <head> <title>videojs支持hls直播实例</title> <link href="./video.css?v=bcd2ce1385" rel="stylesheet"> </head> <body> <video id="roomVideo" class="video-js vjs-default-skin vjs-big-play-centered" x-webkit-airplay="allow" poster="" webkit-playsinline playsinline x5-video-player-type="h5" x5-video-player-fullscreen="true" preload="auto"> <source src="/chat/playlist.m3u8" type="application/x-mpegURL"> </video> <script src="./video.js?v=fc5104a2ab23"></script> <script src="./videojs-contrib-hls.js?v=c726b94b9923"></script> <script type="text/javascript"> var myPlayer = videojs('roomVideo',{ bigPlayButton : false, textTrackDisplay : false, posterImage: true, errorDisplay : false, controlBar : false },function(){ console.log(this) this.on('loadedmetadata',function(){ console.log('loadedmetadata'); //加载到元数据后开始播放视频 startVideo(); }) this.on('ended',function(){ console.log('ended') }) this.on('firstplay',function(){ console.log('firstplay') }) this.on('loadstart',function(){ //开始加载 console.log('loadstart') }) this.on('loadeddata',function(){ console.log('loadeddata') }) this.on('seeking',function(){ //正在去拿视频流的路上 console.log('seeking') }) this.on('seeked',function(){ //已经拿到视频流,可以播放 console.log('seeked') }) this.on('waiting',function(){ console.log('waiting') }) this.on('pause',function(){ console.log('pause') }) this.on('play',function(){ console.log('play') }) }); var isVideoBreak; function startVideo() { myPlayer.play(); //微信内全屏支持 document.getElementById('roomVideo').style.width = window.screen.width + "px"; document.getElementById('roomVideo').style.height = window.screen.height + "px"; //判断开始播放视频,移除高斯模糊等待层 var isVideoPlaying = setInterval(function(){ var currentTime = myPlayer.currentTime(); if(currentTime > 0){ $('.vjs-poster').remove(); clearInterval(isVideoPlaying); } },200) //判断视频是否卡住,卡主3s重新load视频 var lastTime = -1, tryTimes = 0; clearInterval(isVideoBreak); isVideoBreak = setInterval(function(){ var currentTime = myPlayer.currentTime(); console.log('currentTime'+currentTime+'lastTime'+lastTime); if(currentTime == lastTime){ //此时视频已卡主3s //设置当前播放时间为超时时间,此时videojs会在play()后把currentTime设置为0 myPlayer.currentTime(currentTime+10000); myPlayer.play(); //尝试5次播放后,如仍未播放成功提示刷新 if(++tryTimes > 5){ alert('您的网速有点慢,刷新下试试'); tryTimes = 0; } }else{ lastTime = currentTime; tryTimes = 0; } },3000) } </script> </body> </html>
源码请移步github:
videojs支持hls直播实例
附:
一. 视频状态分析:
EVENTS
durationchange
ended
firstplay
fullscreenchange
loadedalldata
loadeddata
loadedmetadata
loadstart
pause
play
progress
seeked
seeking
timeupdate
volumechange
waiting
resize inherited
currentTime()可以用来发辅助判断视频播放情况
二. 视频加载优化:
通过不初始化video无用组件的方式,提高video加载速度
var myPlayer = videojs('roomVideo',{ bigPlayButton : false, textTrackDisplay : false, posterImage: true, errorDisplay : false, controlBar : false },function(){});
未简化之前:
简化后:
三. 你可能也会遇到的错误error
错误1:
{code: 4, message: "No compatible source was found for this media."}
解决:去掉video标签的data-setup="{}", 只保留js的初始配置
错误2:
video.js Uncaught TypeError: Cannot read property 'one' of undefined
解决:
正确
var myPlayer = videojs('roomVideo',{ bigPlayButton : false, textTrackDisplay : false, posterImage: false, errorDisplay : false, controlBar : { captionsButton : false, chaptersButton: false, subtitlesButton:false, liveDisplay:false, playbackRateMenuButton:false } },function(){ console.log(this) });
错误
var myPlayer = videojs('roomVideo',{ children : { bigPlayButton : false, textTrackDisplay : false, posterImage: false, errorDisplay : false, controlBar : { captionsButton : false, chaptersButton: false, subtitlesButton:false, liveDisplay:false, playbackRateMenuButton:false } } },function(){ console.log(this) });
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