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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video.js支持m3u8格式直播的实现示例