Calculate duration of an MP3

The original version has a bug that output mp3 duration is seconds instead of milliseconds. In order to prevent any future api change risk. A fork version is created here.

$ npm install --save mp3d

var mp3Duration = require('mp3d');

mp3Duration('file.mp3', function (err, duration) {
  if (err) return console.log(err.message);
  console.log('Your file is ' + duration + ' seconds long');
});

Type: string | Buffer

Path to the file or a buffer with the file's contents

Defaults to false. When set to true, will estimate the length of a constant-bitrate mp3. This speeds up the calculation a lot but isn't guaranteed to be accurate.

Type: function

Callback to be called once duration is calculated. It's also possible to instead use the returned Promise. duration is the duration of the mp3 in ms.

mp3Duration returns a Promise that resolves to the duration of the mp3 in seconds or rejects with some error.

MIT © Han de Boer