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：
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：
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)
}); 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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