javascript 如何获取 mp3 文件的大小和持续时间？
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How to get the size and duration of an mp3 file?
提问by Ricky
I need to calculate the total length of an mp3 file.
我需要计算一个 mp3 文件的总长度。
Currently I am using a PHP class which I found @ http://www.zedwood.com/article/php-calculate-duration-of-mp3.
目前我正在使用一个 PHP 类，我发现它 @ http://www.zedwood.com/article/php-calculate-duration-of-mp3。
This is working perfectly if the mp3 file in same server.
如果 mp3 文件在同一服务器中，这将完美运行。
but if I have a URL from other site it throwing error. Please help me.
但是如果我有来自其他站点的 URL，它会抛出错误。请帮我。
Is there any JavaScript J-Query function to get the length of the mp3 file
是否有任何 JavaScript J-Query 函数来获取 mp3 文件的长度
<?php include("mp3.class.php");
$f = 'http://cdn.enjoypur.vc/upload_file/5570/5738/5739/7924/Blue%20Eyes%20-%20Yo%20Yo%20Honey%20Singh%20(PagalWorld.com)%20-192Kbps%20.mp3';
$m = new mp3file($f);
$a = $m->get_metadata();
if ($a['Encoding']=='Unknown')
echo "?";
else if ($a['Encoding']=='VBR')
print_r($a);
else if ($a['Encoding']=='CBR')
print_r($a);
unset($a);
?>
回答by user2486495
There is actually a library that can run at client-side, attempting to fetch just enough of the MP3 to read the ID3 tags:
实际上有一个可以在客户端运行的库，试图获取足够的 MP3 来读取 ID3 标签：
http://github.com/aadsm/JavaScript-ID3-Reader
http://github.com/aadsm/JavaScript-ID3-Reader
or
或者
Try
尝试
HTML File API.
HTML 文件 API。
回答by Ilyich
Here's how you can get mp3 duration using Web Audio API:
以下是使用 Web Audio API 获取 mp3 时长的方法：
const mp3file = 'https://raw.githubusercontent.com/prof3ssorSt3v3/media-sample-files/master/doorbell.mp3'
const audioContext = new (window.AudioContext || window.webkitAudioContext)()
const request = new XMLHttpRequest()
request.open('GET', mp3file, true)
request.responseType = 'arraybuffer'
request.onload = function() {
audioContext.decodeAudioData(request.response,
function(buffer) {
let duration = buffer.duration
console.log(duration)
document.write(duration)
}
)
}
request.send()回答by Adarsh Nahar
Use getID3()PHP library that works for VBR files as well.
使用getID3()也适用于 VBR 文件的 PHP 库。
This link help you sourceforge.net.
此链接可帮助您sourceforge.net。
It's very much active in development.
它在开发中非常活跃。
回答by Kirk
A Famous and Very SPI that you can use MP3 SPIand the code is also very simple
一个非常有名的SPI，可以使用MP3 SPI，代码也很简单
File file = new File("filename.mp3");
AudioFileFormat baseFileFormat = AudioSystem.getAudioFileFormat(file);
Map properties = baseFileFormat.properties();
Long duration = (Long) properties.get("duration");
