Id 标记导致音频无法在 chrome 中播放

Question

我在网页上有一个音频元素，我需要向该元素添加一个 id 标签 "player"。我正在使用 getElementById("player").

问题中的元素：

<audio id="player" controls loop>
     <source src="Out_of_the_Skies_Under_the_Earth.mp3" type="audio/mp3">
</audio>

我正在使用 'player' 标签使接下来的两行有用，使用网络音频 API:

var mediaElement = document.getElementById('player');
var sourceNode = context.createMediaElementSource(mediaElement);

这是我唯一使用 ID 'player,' 的地方，我愿意接受任何替代方案。

当我添加 id 标签时，音频不会在 Chrome 中播放（它会在没有标签的情况下播放）。它可以在 Safari 和 Opera 中正常播放，但不能 Chrome。我曾尝试使用 .ogg 将文件弹跳到较小的 bit/sample 速率，改为使用 getElementByClassName，但似乎没有任何效果。

编辑：另外，我想指出播放器确实显示了正确的音频文件长度 (6:03)，并且显示了进度条的移动和正确的时间更新。就好像静音一样

由于我的音频文件是本地的，因此这段代码不一定是我遇到的问题。

自从 post 开始我注意到我得到了错误：'MediaElementAudioSource outputs zeroes due to CORS access restrictions for [local file]' 我认为将文件托管在我自己的域下并具有所需的 CORS header 可能会解决这个问题。我现在没有时间实施这个，但我会在下面的答案中更新 post 我的解决方案。

但与此同时，任何建议都会很棒。

var ctx = window.AudioContext || window.webkitAudioContext;
var context = new ctx();

var mediaElement = document.getElementById('player');
var sourceNode = context.createMediaElementSource(mediaElement);

// create the equalizer. It's a set of biquad Filters

var filters = [];

    // Set filters
    [60, 170, 350, 1000, 3500, 10000].forEach(function(freq, i) {
      var eq = context.createBiquadFilter();
      eq.frequency.value = freq;
      eq.type = "peaking";
      eq.gain.value = 0;
      filters.push(eq);
    });

 // Connect filters in serie
   sourceNode.connect(filters[0]);
   for(var i = 0; i < filters.length - 1; i++) {
      filters[i].connect(filters[i+1]);
    }

// connect the last filter to the speakers
filters[filters.length - 1].connect(context.destination);

function changeGain(sliderVal,nbFilter) {
  var value = parseFloat(sliderVal);
  filters[nbFilter].gain.value = value;

  // update output labels
  var output = document.querySelector("#gain"+nbFilter);
  output.value = value + " dB";
}

div audio {
  display: block;
  margin-bottom:10px;
}

.eq {
  margin: 32px;
  border:1px solid;
  border-radius:15px;
  background-color:lightGrey;
  padding:10px;
  width:300px;
  box-shadow: 10px 10px 5px grey;
  text-align:center;
  font-family: "Open Sans";
  font-size: 12px;
}


div.controls:hover {
  color:blue;
  font-weight:bold;
}
div.controls label {
  display: inline-block;
  text-align: center;
  width: 50px;
}

div.controls label, div.controls input, output {
    vertical-align: middle;
    padding: 0;
    margin: 0;
   font-family: "Open Sans",Verdana,Geneva,sans-serif,sans-serif;
  font-size: 12px;
}

<!DOCTYPE html>
<html lang="en" >

<head>
  <meta charset="UTF-8">
  <title>Equalizer with Bi-Quad Filters</title>



      <link rel="stylesheet" href="css/style.css">


</head>

<body>

  <html lang="en">
  <head>
  </head>
<body>

<div class="eq">
  <audio id="player" controls crossorigin="anonymous" loop>
  <source src="https://vocaroo.com/i/s1lfs67BmoTC">

</audio>
  <div class="controls">
    <label>60Hz</label>
    <input type="range" value="0" step="1" min="-30" max="30" oninput="changeGain(this.value, 0);"></input>
  <output id="gain0">0 dB</output>
  </div>
  <div class="controls">
    <label>170Hz</label>
    <input type="range" value="0" step="1" min="-30" max="30" oninput="changeGain(this.value, 1);"></input>
<output id="gain1">0 dB</output>
  </div>
  <div class="controls">
    <label>350Hz</label>
    <input type="range" value="0" step="1" min="-30" max="30" oninput="changeGain(this.value, 2);"></input>
<output id="gain2">0 dB</output>
  </div>
  <div class="controls">
    <label>1000Hz</label>
    <input type="range" value="0" step="1" min="-30" max="30" oninput="changeGain(this.value, 3);"></input>
<output id="gain3">0 dB</output>
  </div>
  <div class="controls">
    <label>3500Hz</label>
    <input type="range" value="0" step="1" min="-30" max="30" oninput="changeGain(this.value, 4);"></input>
<output id="gain4">0 dB</output>
  </div>
  <div class="controls">
    <label>10000Hz</label>
    <input type="range" value="0" step="1" min="-30" max="30" oninput="changeGain(this.value, 5);"></input>
<output id="gain5">0 dB</output>
  </div>
</div>
</body>
</html>



    <script  src="js/index.js"></script>




</body>

</html>

Answer 1

在 <source> 元素 src 属性中设置的 URL 不使用 CORS headers 并且不是 .mp3 文件。

避免

MediaElementAudioSource outputs zeroes due to CORS access restrictions for <URL>

错误，您可以使用 fetch()、Body.blob() 来获取使用 Access-Control-Allow-Origin header、URL.createObjectURL() 提供的资源以将 Blob 到 Blob URL，然后将 <audio> 元素 src 设置为 Blob URL。

还要注意 <input> 标签是 self-closing； filters 应该全局定义。

var ctx = window.AudioContext || window.webkitAudioContext;
var context = new ctx();
var url = "https://ia600305.us.archive.org/30/items/return_201605/return.mp3";

var filters = [];

fetch(url)
  .then(response => response.blob())
  .then(blob => {
    var blobURL = URL.createObjectURL(blob);
    var mediaElement = document.getElementById('player');
    mediaElement.src = blobURL;
    var sourceNode = context.createMediaElementSource(mediaElement);

    // create the equalizer. It's a set of biquad Filters
    // Set filters
    [60, 170, 350, 1000, 3500, 10000].forEach(function(freq, i) {
      var eq = context.createBiquadFilter();
      eq.frequency.value = freq;
      eq.type = "peaking";
      eq.gain.value = 0;
      filters.push(eq);
    });

    // Connect filters in serie
    sourceNode.connect(filters[0]);
    for (var i = 0; i < filters.length - 1; i++) {
      filters[i].connect(filters[i + 1]);
    }

    // connect the last filter to the speakers
    filters[filters.length - 1].connect(context.destination);

  });

function changeGain(sliderVal, nbFilter) {
  var value = parseFloat(sliderVal);
  filters[nbFilter].gain.value = value;

  // update output labels
  var output = document.querySelector("#gain" + nbFilter);
  output.value = value + " dB";
}

div audio {
  display: block;
  margin-bottom: 10px;
}

.eq {
  margin: 32px;
  border: 1px solid;
  border-radius: 15px;
  background-color: lightGrey;
  padding: 10px;
  width: 300px;
  box-shadow: 10px 10px 5px grey;
  text-align: center;
  font-family: "Open Sans";
  font-size: 12px;
}

div.controls:hover {
  color: blue;
  font-weight: bold;
}

div.controls label {
  display: inline-block;
  text-align: center;
  width: 50px;
}

div.controls label,
div.controls input,
output {
  vertical-align: middle;
  padding: 0;
  margin: 0;
  font-family: "Open Sans", Verdana, Geneva, sans-serif, sans-serif;
  font-size: 12px;
}

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Equalizer with Bi-Quad Filters</title>

</head>
<body>

    <div class="eq">
      <audio id="player" controls crossorigin="anonymous" loop></audio>
      <div class="controls">
        <label>60Hz</label>
        <input type="range" value="0" step="1" min="-30" max="30" oninput="changeGain(this.value, 0);">
        <output id="gain0">0 dB</output>
      </div>
      <div class="controls">
        <label>170Hz</label>
        <input type="range" value="0" step="1" min="-30" max="30" oninput="changeGain(this.value, 1);">
        <output id="gain1">0 dB</output>
      </div>
      <div class="controls">
        <label>350Hz</label>
        <input type="range" value="0" step="1" min="-30" max="30" oninput="changeGain(this.value, 2);">
        <output id="gain2">0 dB</output>
      </div>
      <div class="controls">
        <label>1000Hz</label>
        <input type="range" value="0" step="1" min="-30" max="30" oninput="changeGain(this.value, 3);">
        <output id="gain3">0 dB</output>
      </div>
      <div class="controls">
        <label>3500Hz</label>
        <input type="range" value="0" step="1" min="-30" max="30" oninput="changeGain(this.value, 4);">
        <output id="gain4">0 dB</output>
      </div>
      <div class="controls">
        <label>10000Hz</label>
        <input type="range" value="0" step="1" min="-30" max="30" oninput="changeGain(this.value, 5);">
        <output id="gain5">0 dB</output>
      </div>
    </div>
  </body>

  </html>

Id 标记导致音频无法在 chrome 中播放

Id tag causes audio to not play in chrome

html

javascript

audio

google-chrome

web-audio-api