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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