如何在JavaScript中检查上载视频的长度/持续时间 [英] How to Check Length / Duration of an Uploaded Video in JavaScript

问题描述

有没有办法检查用户上传的视频文件的长度？

Is there a way to check the length of a video file that is being uploaded by a user?

尝试。持续时间，但这似乎只适用于已在DOM中引用的托管视频。

Tried .duration, but this seems to only work on hosted videos that is already referenced in the DOM.

推荐答案

某事怎么样喜欢这个？

// create the video element but don't add it to the page
var vid = document.createElement('video');
document.querySelector('#input').addEventListener('change', function() {
  // create url to use as the src of the video
  var fileURL = URL.createObjectURL(this.files[0]);
  vid.src = fileURL;
  // wait for duration to change from NaN to the actual duration
  vid.ondurationchange = function() {
    alert(this.duration);
  };
});

<input type="file" id="input">

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