如何一次播放一个Youtube视频，多个嵌入同一页面？

Question

当用户播放新视频时，我得到暂停已经播放的视频的代码。我必须嵌入多个YouTube视频。我正在做的是最初加载几个视频，当用户点击显示更多时休息。

此代码适用于已加载的视频，但不适用于稍后加载的视频，即window.load之后。

以下是使用YouTube的iframe API的JavaScript代码：

    var tag = document.createElement("script");
tag.src = "//www.youtube.com/iframe_api";
var firstScriptTag = document.getElementsByTagName("script")[0];
firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);

function onYouTubeIframeAPIReady() {
  console.log("function called");
    var $ = jQuery;
    var players = [];
    $("iframe").filter(function(){return this.src.indexOf("http://www.youtube.com/") == 0}).each( function (k, v) {
        if (!this.id) { this.id="embeddedvideoiframe" + k }
        players.push(new YT.Player(this.id, {
            events: {
                "onStateChange": function(event) {
                    console.log("Event called");
                    if (event.data == YT.PlayerState.PLAYING) {
                        $.each(players, function(k, v) {
                            if (this.getIframe().id != event.target.getIframe().id) {
                                this.pauseVideo();
                            }
                        });
                    }
                }
            }
        }))
    });
}

我在加载点播视频后尝试调用此function onYouTubeIframeAPIReady()。仍然没有工作。

请帮忙。

Answer 1

实际上问题是这段代码在页面加载时调用了YouTubeIframeAPIReady（）函数。因此，它为页面加载上加载的视频创建了事件监听器，而不是为了稍后嵌入/加载的视频。

我是如何解决这个问题的，我只是在每次加载更多视频后调用onYouTubeIframeAPIReady（）函数而我也按照他们的ID保存已经绑定的玩家的跟踪一个数组并在再次绑定之前检查以避免重新绑定问题。

我在代码中做了3次更改。

更改1： 在绑定之前检查已绑定的播放器，并在绑定后在alreadyBindedPlayers数组中添加其id。

    if(alreadyBindedPlayers.indexOf(this.id)==-1){
     //create event listener
     players.push(new YT.Player(this.id, {
            events: {
                "onStateChange": function(event) {
                    console.log("Event called");
                    if (event.data == YT.PlayerState.PLAYING) {
                        $.each(players, function(k, v) {
                            if (this.getIframe().id !=   
                               event.target.getIframe().id) {
                                this.pauseVideo();
                            }
                        });
                    }
                }
            }
        }));
        alreadyBindedPlayers.push(this.id);  //pushing player id in array
    } 

更改2： 每次按需加载更多视频后（在window.load（）之后），我都调用了YouTubeIframeAPIReady（）函数。这样这个函数也可以为新嵌入的视频创建事件监听器。

更改3： 我做的另一项改进是我在onYouTubeIframeAPIReady（）函数之外声明了player []数组，以避免重新声明。

感谢@kos的支持。

Answer 2

用于一次以HTML播放一个YouTube嵌入式视频...

即使几天前我在处理视频轮播时也遇到了同样的问题...最后，我现在有一个解决方案...首先使用<iframe>标签嵌入youtube视频，然后在视频网址?html5=1&enablejsapi=1的末尾键入以下内容...然后将以下JavaScript代码直接包含在您的项目中，而无需对其进行任何编辑！

所需功能的JavaScript代码如下-

      <script>
    var ytplayerList;

    function onPlayerReady(e) {
        var video_data = e.target.getVideoData(),
            label = video_data.video_id+':'+video_data.title;
        e.target.ulabel = label;
        console.log(label + " is ready!");

    }
    function onPlayerError(e) {
        console.log('[onPlayerError]');
    }
    function onPlayerStateChange(e) {
        var label = e.target.ulabel;
        if (e["data"] == YT.PlayerState.PLAYING) {
            console.log({
                event: "youtube",
                action: "play:"+e.target.getPlaybackQuality(),
                label: label
            });
            //if one video is play then pause other
            pauseOthersYoutubes(e.target);
        }
        if (e["data"] == YT.PlayerState.PAUSED) {
            console.log({
                event: "youtube",
                action: "pause:"+e.target.getPlaybackQuality(),
                label: label
            });
        }
        if (e["data"] == YT.PlayerState.ENDED) {
            console.log({
                event: "youtube",
                action: "end",
                label: label
            });
        }
        //track number of buffering and quality of video
        if (e["data"] == YT.PlayerState.BUFFERING) {
            e.target.uBufferingCount?++e.target.uBufferingCount:e.target.uBufferingCount=1; 
            console.log({
                event: "youtube",
                action: "buffering["+e.target.uBufferingCount+"]:"+e.target.getPlaybackQuality(),
                label: label
            });
            //if one video is play then pause other, this is needed because at start video is in buffered state and start playing without go to playing state
            if( YT.PlayerState.UNSTARTED ==  e.target.uLastPlayerState ){
                pauseOthersYoutubes(e.target);
            }
        }
        //last action keep stage in uLastPlayerState
        if( e.data != e.target.uLastPlayerState ) {
            console.log(label + ":state change from " + e.target.uLastPlayerState + " to " + e.data);
            e.target.uLastPlayerState = e.data;
        }
    }
    function initYoutubePlayers(){
        ytplayerList = null; //reset
        ytplayerList = []; //create new array to hold youtube player
        for (var e = document.getElementsByTagName("iframe"), x = e.length; x-- ;) {
            if (/youtube.com\/embed/.test(e[x].src)) {
                ytplayerList.push(initYoutubePlayer(e[x]));
                console.log("create a Youtube player successfully");
            }
        }

    }
    function pauseOthersYoutubes( currentPlayer ) {
        if (!currentPlayer) return;
        for (var i = ytplayerList.length; i-- ;){
            if( ytplayerList[i] && (ytplayerList[i] != currentPlayer) ){
                ytplayerList[i].pauseVideo();
            }
        }  
    }
    //init a youtube iframe
    function initYoutubePlayer(ytiframe){
        console.log("have youtube iframe");
        var ytp = new YT.Player(ytiframe, {
            events: {
                onStateChange: onPlayerStateChange,
                onError: onPlayerError,
                onReady: onPlayerReady
            }
        });
        ytiframe.ytp = ytp;
        return ytp;
    }
    function onYouTubeIframeAPIReady() {
        console.log("YouTubeIframeAPI is ready");
        initYoutubePlayers();
    }
    var tag = document.createElement('script');
    //use https when loading script and youtube iframe src since if user is logging in youtube the youtube src will switch to https.
    tag.src = "https://www.youtube.com/iframe_api";
    var firstScriptTag = document.getElementsByTagName('script')[0];
    firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);    

  </script>

我建议您将其包含在HTML页面本身中...

以下是该解决方案的实时示例！！！

/*javascipt for the following slider*/
/* Create an array to hold the different image positions */
      var itemPositions = [];
      var numberOfItems = $('#scroller .item').length;
      
      /* Assign each array element a CSS class based on its initial position */
      function assignPositions() {
        for (var i = 0; i < numberOfItems; i++) {
          if (i === 0) {
            itemPositions[i] = 'left-hidden';
          } else if (i === 1) {
            itemPositions[i] = 'left';
          } else if (i === 2) {
            itemPositions[i] = 'middle';
          } else if (i === 3) {
            itemPositions[i] = 'right';
          } else {
            itemPositions[i] = 'right-hidden';
          }
        }
        /* Add each class to the corresponding element */
        $('#scroller .item').each(function(index) {
          $(this).addClass(itemPositions[index]);
        });
      }
      
      /* To scroll, we shift the array values by one place and reapply the classes to the images */
      function scroll(direction) {
        if (direction === 'prev') {
          itemPositions.push(itemPositions.shift());
        } else if (direction === 'next') {
          itemPositions.unshift(itemPositions.pop());
        }
        $('#scroller .item').removeClass('left-hidden left middle right right-hidden').each(function(index) {
          $(this).addClass(itemPositions[index]);
        });
      }
      
      /* Do all this when the DOMs ready */
      $(document).ready(function() {
      
        assignPositions();
        var autoScroll = window.setInterval("scroll('next')", 4000);
      
        /* Hover behaviours */
        $('#scroller').hover(function() {
          window.clearInterval(autoScroll);
          $('.nav').stop(true, true).fadeIn(200);
        }, function() {
          $('.nav').stop(true, true).fadeOut(200);
        });
      
        /* Click behaviours */
        $('.prev').click(function() {
          scroll('prev');
        });
        $('.next').click(function() {
          scroll('next');
        });
      
      });

html {
  scroll-behavior: smooth;
}

body {
  overflow-x: hidden;
  margin: 0;
  padding: 0;
  width: 100vw;
  user-select: none;
  -ms-overflow-style: none;
}

body::-webkit-scrollbar {
  display: none;
}

.carousel {
  background-image: url(carousel1.jpg);
  width: 100vw;
  height: 52.5vw;
  background-size: 100vw 52.5vw;
}

#scroller {
  position: absolute;
  top: 12vw;
  left: 25vw;
  width: 50vw;
  height: 28vw;
  margin: 0 auto;
  padding: 0;
  -webkit-perspective: 40vw;
  -moz-perspective: 50vw;
  -o-perspective: 50vw;
}

#scroller .item {
  width: 50vw;
  height: 28vw;
  display: block;
  position: absolute;
  border-radius: 1vw;
  -webkit-box-reflect: below 0px -webkit-gradient(linear, left top, left bottom, from(transparent), color-stop(.85, transparent), to(rgba(255, 255, 255, 0.15)));
  -webkit-transition: all 0.4s ease-in-out;
  -moz-transition: all 0.4s ease-in-out;
  -o-transition: all 0.4s ease-in-out;
  z-index: 0;
}
/* Since inset shadows don't play nice with images, we'll create a pseudo element and apply our image styling to that instead */

#scroller .item .youtube-video {
  display: block;
  border-radius: 1vw;
}

#scroller .left {
  pointer-events: none;
  -webkit-transform: rotateY(25deg) translateX(-320px) skewY(-5deg) scale(0.4, 0.6);
  -moz-transform: rotateY(25deg) translateX(-320px) skewY(-5deg) scale(0.4, 0.6);
  -o-transform: rotateY(25deg) translateX(-320px) skewY(-5deg) scale(0.4, 0.6);
}

#scroller .middle {
  z-index: 1;
  -webkit-transform: rotateY(0deg) translateX(0) scale(1);
  -moz-transform: rotateY(0deg) translateX(0) scale(1);
  -o-transform: rotateY(0deg) translateX(0) scale(1);
}

#scroller .right {
  pointer-events: none;
  -webkit-transform: rotateY(-25deg) translateX(320px) skewY(5deg) scale(0.4, 0.6);
  -moz-transform: rotateY(-25deg) translateX(320px) skewY(5deg) scale(0.4, 0.6);
  -o-transform: rotateY(-25deg) translateX(320px) skewY(5deg) scale(0.4, 0.6);
}

#scroller .left-hidden {
  opacity: 0;
  z-index: -1;
  pointer-events: none;
  -webkit-transform: rotateY(25deg) translateX(-430px) skewY(-5deg) scale(0.3, 0.5);
  -moz-transform: rotateY(25deg) translateX(-430px) skewY(-5deg) scale(0.3, 0.5);
  -o-transform: rotateY(25deg) translateX(-430px) skewY(-5deg) scale(0.3, 0.5);
}

#scroller .right-hidden {
  opacity: 0;
  z-index: -1;
  pointer-events: none;
  -webkit-transform: rotateY(-25deg) translateX(430px) skewY(5deg) scale(0.3, 0.5);
  -moz-transform: rotateY(-25deg) translateX(430px) skewY(5deg) scale(0.3, 0.5);
  -o-transform: rotateY(-25deg) translateX(430px) skewY(5deg) scale(0.3, 0.5);
}

.nav {
  position: absolute;
  width: 50vw;
  height: 2vw;
  margin: 14vw 0 0;
  z-index: 2;
  display: none;
}

.prev,
.next {
  position: absolute;
  display: block;
  height: 2vw;
  width: 2vw;
  background-color: rgba(255, 255, 255, 0.85);
  border-radius: 2vw;
  color: #1d1919;
  bottom: 20px;
  font-size: 2vw;
  text-align: center;
  line-height: 1.5vw;
  cursor: pointer;
  border: 2px solid #000;
}

.prev {
  left: 1vw;
}

.next {
  left: inherit;
  right: 1vw;
}

.prev:hover,
.next:hover {
  border: 0.01vw solid #000;
}

<!DOCTYPE html>
<html lang="en" dir="ltr">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">    
    <link rel="stylesheet" type="text/css" href="index1.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
    <!-- Load font awesome icons -->
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

    <title>Gully Ball - carousel</title>
    <link rel="icon" href="logo.png" type="image/jpg" sizes="18x18">

  </head>
  <body>
    <div class="carousel">
      <div class="slideshow-container" id="scroller">
  
        <div class="nav">
          <a class="prev">&laquo;</a>
          <a class="next">&raquo;</a>
        </div>
  
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/xOiVl3qaFkw?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/keTYvc-xU64?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div> 
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/ejlFMXU_Lg0?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/73f3QPsm80Y?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/z3L8EqCb958?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/uKkFIjsLVOo?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/W4gVYFMBU88?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/EsU5tKG4rxk?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/DyI57PYkmDA?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/CbZpZpUb_5A?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/yfOsin7OcA0?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/6cJcfVv35oU?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/lTwl7UQN_CQ?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/Sc77-58rtlI?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/GbN5LBNAYMY?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
        <div class="item">
          <iframe class="youtube-video" width="100%" height="100%" src="https://www.youtube.com/embed/UYNwSeupjUM?html5=1&enablejsapi=1;rel=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        </div>
      </div>
    </div>  
      <script>
        var ytplayerList;

        function onPlayerReady(e) {
            var video_data = e.target.getVideoData(),
                label = video_data.video_id+':'+video_data.title;
            e.target.ulabel = label;
            console.log(label + " is ready!");
         
        }
        function onPlayerError(e) {
            console.log('[onPlayerError]');
        }
        function onPlayerStateChange(e) {
            var label = e.target.ulabel;
            if (e["data"] == YT.PlayerState.PLAYING) {
                console.log({
                    event: "youtube",
                    action: "play:"+e.target.getPlaybackQuality(),
                    label: label
                });
                //if one video is play then pause other
                pauseOthersYoutubes(e.target);
            }
            if (e["data"] == YT.PlayerState.PAUSED) {
                console.log({
                    event: "youtube",
                    action: "pause:"+e.target.getPlaybackQuality(),
                    label: label
                });
            }
            if (e["data"] == YT.PlayerState.ENDED) {
                console.log({
                    event: "youtube",
                    action: "end",
                    label: label
                });
            }
            //track number of buffering and quality of video
            if (e["data"] == YT.PlayerState.BUFFERING) {
                e.target.uBufferingCount?++e.target.uBufferingCount:e.target.uBufferingCount=1; 
                console.log({
                    event: "youtube",
                    action: "buffering["+e.target.uBufferingCount+"]:"+e.target.getPlaybackQuality(),
                    label: label
                });
                //if one video is play then pause other, this is needed because at start video is in buffered state and start playing without go to playing state
                if( YT.PlayerState.UNSTARTED ==  e.target.uLastPlayerState ){
                    pauseOthersYoutubes(e.target);
                }
            }
            //last action keep stage in uLastPlayerState
            if( e.data != e.target.uLastPlayerState ) {
                console.log(label + ":state change from " + e.target.uLastPlayerState + " to " + e.data);
                e.target.uLastPlayerState = e.data;
            }
        }
        function initYoutubePlayers(){
            ytplayerList = null; //reset
            ytplayerList = []; //create new array to hold youtube player
            for (var e = document.getElementsByTagName("iframe"), x = e.length; x-- ;) {
                if (/youtube.com\/embed/.test(e[x].src)) {
                    ytplayerList.push(initYoutubePlayer(e[x]));
                    console.log("create a Youtube player successfully");
                }
            }
            
        }
        function pauseOthersYoutubes( currentPlayer ) {
            if (!currentPlayer) return;
            for (var i = ytplayerList.length; i-- ;){
                if( ytplayerList[i] && (ytplayerList[i] != currentPlayer) ){
                    ytplayerList[i].pauseVideo();
                }
            }  
        }
        //init a youtube iframe
        function initYoutubePlayer(ytiframe){
            console.log("have youtube iframe");
            var ytp = new YT.Player(ytiframe, {
                events: {
                    onStateChange: onPlayerStateChange,
                    onError: onPlayerError,
                    onReady: onPlayerReady
                }
            });
            ytiframe.ytp = ytp;
            return ytp;
        }
        function onYouTubeIframeAPIReady() {
            console.log("YouTubeIframeAPI is ready");
            initYoutubePlayers();
        }
        var tag = document.createElement('script');
        //use https when loading script and youtube iframe src since if user is logging in youtube the youtube src will switch to https.
        tag.src = "https://www.youtube.com/iframe_api";
        var firstScriptTag = document.getElementsByTagName('script')[0];
        firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);    
                
      </script>
  </body>
</html>

祝你有美好的一天！
问候，
欧姆乔杜里（Om Chaudhary）