如何在同一页面上嵌入的多个视频中一次播放一个 Youtube 视频？

Question

当用户播放新视频时，我得到了代码来暂停已经播放的视频。我必须嵌入多个 YouTube 视频。我正在做的是最初加载一些视频并在用户单击显示更多时休息。

这个代码对于已经加载的视频工作得很好，但不适用于稍后加载的视频，即window.load之后。

这是使用 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();
                            }
                        });
                    }
                }
            }
        }))
    });
}

在加载点播视频后，我尝试调用此function onYouTubeIframeAPIReady()。还是不行。

请帮忙。

Answer 1

实际上问题在于此代码在页面加载时调用了 onYouTubeIframeAPIReady() 函数。因此，它为页面加载时加载的视频创建事件侦听器而不是为稍后按需嵌入/加载的视频。

我如何解决这个问题是我只是在每次加载更多视频后调用 onYouTubeIframeAPIReady() 函数，并且我还通过他们的 id 跟踪已经绑定的玩家一个数组并在再次绑定之前检查以避免重新绑定问题。

我总共对代码做了 3 处更改。

更改 1： 在绑定之前检查已经绑定的播放器，并在绑定后将其 id 添加到 alreadyBindedPlayers 数组中。

    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），我都会调用 onYouTubeIframeAPIReady() 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。

变化 3： 我做的另一个改进是我在 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

用于在 HTML 中一次播放一个 YouTube 嵌入视频...

即使我几天前在制作视频轮播时也遇到了同样的问题...最后，我现在有了解决方案...首先使用<iframe>标签嵌入youtube视频和在视频的 url ?html5=1&enablejsapi=1... 的末尾输入以下内容，然后将以下 JavaScript 代码直接包含在您的项目中，无需对其进行任何编辑！

所需函数的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>

我会建议你将它包含在 HTML 页面本身中...

以下是解决方案的实例！！！

/*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，
奥姆乔杜里