动态变化的视频使 play() 请求被新的加载请求中断答案

【问题标题】：dynamically changing video gives the play() request was interrupted by a new load request动态变化的视频使 play() 请求被新的加载请求中断
【发布时间】：2017-03-07 04:51:00
【问题描述】：

动态更改视频时，我在服务器控制台下收到以下错误

(index):71 Uncaught (in promise) DOMException: The play() request was interrupted by a new load request.

发生更改时我正在使用以下代码

function playlocalVID()
{
        var player = document.getElementById("video");
        var currentVID = document.getElementById('currentVID');
        var selectedLocalVID = document.getElementById('howtovideo').files[0];
        currentVID.setAttribute('src', URL.createObjectURL(new Blob([selectedLocalVID])));
        player.load();
        player.play();
}

但是当更改视频 3 - 4 次或点击删除按钮时

我遇到了问题

Uncaught (in promise) DOMException: The play() request was interrupted by a new load request.

这是我的小提琴

https://jsfiddle.net/q3hhk17e/36/

请告诉我如何解决这个问题。

【问题讨论】：

能否请您告诉我在这种情况下引导程序是什么意思？
stackoverflow.com/questions/36803176/…
删除按钮调用了什么函数？

标签： javascript

【解决方案1】：

将canplay 事件附加到#video 元素，在playlocalVID() 内调用从File 对象创建Blob URL，注意不必也以File 对象作为参数调用Blob()；将当前File.name 设置为#video .dataset；将<input type="file"> 元素.value 设置为null，以便在连续选择相同文件时调用change 事件；在#video 元素上调用.load()；等待canplay 或canplaythrough 事件在#video 元素处分派；在canplay 事件处理程序调用.play() 在#video 元素。

<!DOCTYPE html>
<html>

<head>
</head>

<body>
  <div class="form-group last">
    <label class="control-label col-md-3">How to video</label>
    <div class="col-md-9">
      <div class="fileinput fileinput-new" data-provides="fileinput">
        <figure>
          <video id="video" width="150" height="100" controls>
            <source id='currentVID' src="" type="video/mp4">
          </video>
          <figcaption></figcaption>
        </figure>
        <div class="fileinput-preview fileinput-exists" style="max-width: 200px; max-height: 150px;"></div>
        <div>
          <span class="btn default btn-file">
            <span class="fileinput-new"> Select Video </span>
          <span class="fileinput-exists"> Change </span>
          <input type="file" id="howtovideo" name="howtovideo" accept="video/mp4" autoplay onchange="playlocalVID();" />
          </span>
          <a href="javascript:;" class="btn red fileinput-exists removepic" data-name="removeforhowtovideo" data-dismiss="fileinput"> Remove </a>
        </div>
      </div>
    </div>
  </div>
  <script>
    var player = document.getElementById("video");
    var currentVID = document.getElementById('currentVID');
    var caption = document.querySelector("figcaption");
    var selectedLocalVID = document.getElementById("howtovideo");
     // reference to `Blob URL` to be created at `playLocalVID`
    var url;
     // attach `canplay` event to `player`
    player.addEventListener("canplay", function handleEvent(e) {
      this.play();
      // set `figcaption` to current video `File.name`
      caption.innerHTML = this.dataset.currentVideo;
    });

    function playlocalVID() {
      if (url) {
        console.log(url);
        // if `url` is defined revoke existing `Blob URL`
        URL.revokeObjectURL(url);
      }
      // create `Blob URL` of `File` object
      url = URL.createObjectURL(selectedLocalVID.files[0]);
      // set `.name` of current `File` at `player.dataset.currentVideo`
      player.dataset.currentVideo = selectedLocalVID.files[0].name;
      // reset `input type="file"` event
      selectedLocalVID.value = null;
      // call `.pause()` at `player`
      player.pause();
      // set new `src` at `<source>` element
      currentVID.setAttribute("src", url);
      // call `.load()` on `player`
      // wait for `canplay` event
      player.load();
    }
  </script>
</body>

</html>

【讨论】：

有点乱，但它对我有用。（重要的部分只是：github.com/sampotts/plyr/issues/331#issuecomment-529398384）