我如何对 youtube 嵌入播放器进行编程以在单击时取消静音

Question

如何将 youtube 嵌入式播放器设置为在单击时取消静音。您可以在http://www.harvestarmy.org主页上看到我所指的嵌入式播放器。它是右侧的那个，上面写着“来自 YouTube 的最新视频。我将其设置为默认静音，但我希望它在有人点击时自动取消静音。

这是我使用的代码：

<!-- 1. The <iframe> (and video player) will replace this <div> tag. -->
<div id="player"></div>

<script>
  // 2. This code loads the IFrame Player API code asynchronously.
  var tag = document.createElement('script');

  // This is a protocol-relative URL as described here:
  //     http://paulirish.com/2010/the-protocol-relative-url/
  // If you're testing a local page accessed via a file:/// URL, please set tag.src to
  //     "https://www.youtube.com/iframe_api" instead.
  tag.src = "//www.youtube.com/iframe_api";
  var firstScriptTag = document.getElementsByTagName('script')[0];
  firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);

  // 3. This function creates an <iframe> (and YouTube player)
  //    after the API code downloads.
  var player;
  function onYouTubeIframeAPIReady() {
    player = new YT.Player('player', {
      height: '98',
      width: '175',
      playerVars: {
        'list': 'UUFwY5Al1Doy7f0MdKnJ-gaw',
        'modestbranding': 1,
        'showinfo': 0,
        'autoplay': 1
      },
      events: {
        'onReady': onPlayerReady
      }
    });
  }

  // 4. The API will call this function when the video player is ready.
  function onPlayerReady(event) {
    event.target.mute();
  }

</script>

Answer 1

谢谢你的回答！我的实现方式略有不同，将其添加到 onYouTubeIframeAPIReady 函数中。

我还反转了 isUnMulated 变量的初始化值。功能上是相同的，但这样更有意义。

var player;
var isUnMuted = false;
window.onYouTubeIframeAPIReady = function() {
    player = new YT.Player('youTube', {
        videoId: '[myVideoId]',
        playerVars: {
            'rel': 0,
        },
        events: {
            'onReady': function() {
                player.mute();
                player.playVideo();
            },
            'onStateChange': function () {
                if (player.isMuted() && player.getPlayerState() == 2 && !isUnMuted) {
                    player.unMute();
                    player.playVideo();
                    isUnMuted = true;
                }
            }
        }
    });
}

这与 Facebook 新闻源中嵌入视频的行为非常相似。

Answer 2

我认为这是不可能的，因为没有“点击”或“激活”事件之类的东西。但是，您可以尝试向“onStateChange”事件添加事件处理程序，并取消静音和取消暂停播放器。我还没有尝试过，但尝试一下看看是否有效：

var isUnMuted = true;

player.addEventListener("onStateChange", function(event) {
     if( player.isMuted() && player.getPlayerState() == 2 && isUnMuted ) {
          player.unMute();
          player.playVideo(); // resume playback
          isUnMuted = false;  // you want to run this once only! 
     }
});