我可以为 HTML5 文件上传设置视频长度限制吗？

Question

When uploading a video through a HTML5 input such as:

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

I know it is possible to set a limit on the file size using PHP / Node.Js.

Is there a way to set a limit on the video length, not the file size?

IE: Only allow a user to upload videos which are 15 seconds or less.

Answer 1

Here's what I found:

Solution 1: Create a video element that plays a local video file and then runs video.duration on it.

 var vid = document.getElementById("myVideo"); function myFunction() { alert(vid.duration); } (function localFileVideoPlayer() { 'use strict' var URL = window.URL || window.webkitURL var displayMessage = function (message, isError) { var element = document.querySelector('#message') element.innerHTML = message element.className = isError ? 'error' : 'info' } var playSelectedFile = function (event) { var file = this.files[0] var type = file.type var videoNode = document.querySelector('video') var canPlay = videoNode.canPlayType(type) if (canPlay === '') canPlay = 'no' var message = 'Can play type "' + type + '": ' + canPlay var isError = canPlay === 'no' displayMessage(message, isError) if (isError) { return } var fileURL = URL.createObjectURL(file) videoNode.src = fileURL } var inputNode = document.querySelector('input') inputNode.addEventListener('change', playSelectedFile, false) })()

 <h3>Step 1: Upload a video</h3> <h3>Step 2: Get length</h3> <h3>Step 3: ???</h3> <h3>Step 4: Profit</h3> <button onclick="myFunction()" type="button">Get video length</button> <hr> <div id="message"></div> <input type="file" accept="video/*"/> <video controls autoplay id="myVideo"></video>

Solution 2: use mediainfo.js https://mediainfo.js.org/