video.js支持m3u8格式直播

時間 2019-11-18

標籤 video.js video 支持 m3u8 格式直播欄目 JavaScript 简体版

原文原文鏈接

爲何要使用video.js？javascript

1. PC端瀏覽器並不支持video直接播放m3u8格式的視頻css

2. 手機端各式各樣的瀏覽器定製的video界面風格不統一，直接寫原生的js控制視頻兼容性較差html

3. video.js解決以上兩個問題，還能夠有各類視頻狀態接口暴露，優化體驗java

核心代碼：git

<!DOCTYPE html>
<html>
<head>
    <title>videojs支持hls直播實例</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');
                //加載到元數據後開始播放視頻
                startVideo();
            })

            this.on('ended',function(){
                console.log('ended')
            })
            this.on('firstplay',function(){
                console.log('firstplay')
            })
            this.on('loadstart',function(){
            //開始加載
                console.log('loadstart')
            })
            this.on('loadeddata',function(){
                console.log('loadeddata')
            })
            this.on('seeking',function(){
            //正在去拿視頻流的路上
                console.log('seeking')
            })
            this.on('seeked',function(){
            //已經拿到視頻流,能夠播放
                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();

            //微信內全屏支持
            document.getElementById('roomVideo').style.width = window.screen.width + "px";
            document.getElementById('roomVideo').style.height = window.screen.height + "px";


            //判斷開始播放視頻，移除高斯模糊等待層
            var isVideoPlaying = setInterval(function(){
                var currentTime = myPlayer.currentTime();
                if(currentTime > 0){
                    $('.vjs-poster').remove();
                    clearInterval(isVideoPlaying);
                }
            },200)

            //判斷視頻是否卡住，卡主3s從新load視頻
            var lastTime = -1,
                tryTimes = 0;
            
            clearInterval(isVideoBreak);
            isVideoBreak = setInterval(function(){
                var currentTime = myPlayer.currentTime();
                console.log('currentTime'+currentTime+'lastTime'+lastTime);

                if(currentTime == lastTime){
                    //此時視頻已卡主3s
                    //設置當前播放時間爲超時時間，此時videojs會在play()後把currentTime設置爲0
                    myPlayer.currentTime(currentTime+10000);
                    myPlayer.play();

                    //嘗試5次播放後，如仍未播放成功提示刷新
                    if(++tryTimes > 5){
                        alert('您的網速有點慢，刷新下試試');
                        tryTimes = 0;
                    }
                }else{
                    lastTime = currentTime;
                    tryTimes = 0;
                }
            },3000)

        }
    </script>

</body>
</html>

源碼請移步github：github

videojs支持hls直播實例web

附：瀏覽器

一.　　視頻狀態分析：微信

EVENTS

durationchange
ended
firstplay
fullscreenchange
loadedalldata
loadeddata
loadedmetadata
loadstart
pause
play
progress
seeked
seeking
timeupdate
volumechange
waiting
resize inherited

currentTime()能夠用來發輔助判斷視頻播放狀況app

二.　　視頻加載優化：

經過不初始化video無用組件的方式，提升video加載速度

var myPlayer = videojs('roomVideo',{
            bigPlayButton : false,
            textTrackDisplay : false,
            posterImage: true,
            errorDisplay : false,
            controlBar : false
        },function(){});

未簡化以前：

簡化後：

三.　　你可能也會遇到的錯誤error

錯誤1：

{code: 4, message: "No compatible source was found for this media."}

解決：去掉video標籤的data-setup="{}"，只保留js的初始配置

錯誤2：

video.js Uncaught TypeError: Cannot read property 'one' of undefined

解決：

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)
    });

正確

    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)
    });