用 HTML5视频标签播放本地(硬盘)视频文件？

我想做到以下几点。

<video src="file:///Users/username/folder/video.webm">
</video>

其目的是让用户能够从他/她的硬盘驱动器中选择一个文件。

不上传的原因当然是传输成本和存储配额。没有理由保存文件。

有可能吗？

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小开

That will be possible only if the HTML file is also loaded with the file protocol from the local user's harddisk.

If the HTML page is served by HTTP from a server, you can't access any local files by specifying them in a src attribute with the file:// protocol as that would mean you could access any file on the users computer without the user knowing which would be a huge security risk.

As Dimitar Bonev said, you can access a file if the user selects it using a file selector on their own. Without that step, it's forbidden by all browsers for good reasons. Thus, while his answer might prove useful for many people, it loosens the requirement from the code in the original question.

小开
最佳答案

It is possible to play a local video file.

<input type="file" accept="video/*"/>
<video controls autoplay></video>

When a file is selected via the input element:

  1. 'change' event is fired
  2. Get the first File object from the input.files FileList
  3. Make an object URL that points to the File object
  4. Set the object URL to the video.src property

  5. Lean back and watch :)

http://jsfiddle.net/dsbonev/cCCZ2/embedded/result,js,html,css/

(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)
})()
video,
input {
display: block;
}


input {
width: 100%;
}


.info {
background-color: aqua;
}


.error {
background-color: red;
color: white;
}
<h1>HTML5 local video file player example</h1>
<div id="message"></div>
<input type="file" accept="video/*" />
<video controls autoplay></video>

小开

Ran in to this problem a while ago. Website couldn't access video file on local PC due to security settings (understandable really) ONLY way I could get around it was to run a webserver on the local PC (server2Go) and all references to the video file from the web were to the localhost/video.mp4

<div id="videoDiv">
<video id="video" src="http://127.0.0.1:4001/videos/<?php $videoFileName?>" width="70%" controls>
</div>
<!--End videoDiv-->

Not an ideal solution but worked for me.

小开

I tried to simplify the answer of Dimitar Bonev as much as I could.

<html>
<head>
<title>HTML5 local video file player example</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body>
<h1>HTML5 local video file player example</h1>
<input type="file" accept="video/*"><br>
<video controls></video>
<script type="text/javascript">
(function localFileVideoPlayer() {
'use strict'
var playSelectedFile = function(event) {
var file = this.files[0]
var URL = window.URL || window.webkitURL
var fileURL = URL.createObjectURL(file)
var videoNode = document.querySelector('video')
videoNode.src = fileURL
}
var inputNode = document.querySelector('input')
inputNode.addEventListener('change', playSelectedFile, false)
})()
</script>
<p>I hereby signed confess solemnly that I have no idea what this code does. But it now works.
<p>Firefox Lubuntu 18.03
<p>Simplified: `http://jsfiddle.net/dsbonev/cCCZ2/` `https://stackoverflow.com/users/691308/dimitar-bonev`
</body>
</html>

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