How to get the size and duration of an mp3 file?

Question

I need to calculate the total length of an mp3 file.

Currently I am using a PHP class which I found @ http://www.zedwood.com/article/php-calculate-duration-of-mp3.

Answer 1

Perhaps the simplest solution is to use the audio html element to get the time duration and to obtain the size directly from the file returned by the FileReader object. A code example of this approach is shown below.

One down side of this and all the other solutions presented so far is the 10-20 second delay it takes for the audio tag's durationchanged event to fire when loading large, eg > 200MB files. Clearly there is a faster way to get this info because the duration is shown immediately when the file is entered into the browser as a file:///.... URL.

function checkMp3SizeAndDuration()
{    
    var files = document.getElementById('upload-file').files;
    var file = files[0];
    if (file.size > MAX_FILE_SIZE) {
        return;
    }

    var reader = new FileReader();
    var audio = document.createElement('audio');
    reader.onload = function (e) {
        audio.src = e.target.result
        audio.addEventListener('durationchange', function() {
            console.log("durationchange: " + audio.duration);
        },false);

        audio.addEventListener('onerror', function() {
            alert("Cannot get duration of this file.");
        }, false);
    };
    reader.readAsDataURL(file);
});

Answer 2

A Famous and Very SPI that you can use MP3 SPI and the code is also very simple

File file = new File("filename.mp3");
AudioFileFormat baseFileFormat = AudioSystem.getAudioFileFormat(file);
Map properties = baseFileFormat.properties();
Long duration = (Long) properties.get("duration");

Answer 3

Use getID3() PHP library that works for VBR files as well.

This link help you sourceforge.net.

It's very much active in development.

Answer 4

Having not been able to find something that was fast and didn't require a bunch of extra boilerplate code, I tweaked an existing server side javascript utility to run directly in the browser. Demo code is available at: https://github.com/eric-gilbertson/fast-mp3-duration

Answer 5

There is actually a library that can run at client-side, attempting to fetch just enough of the MP3 to read the ID3 tags:

http://github.com/aadsm/JavaScript-ID3-Reader

or

Try

HTML File API.

http://lostechies.com/derickbailey/2013/09/23/getting-audio-file-information-with-htmls-file-api-and-audio-element/

Answer 6

Here's how you can get mp3 duration using Web Audio API:

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()