how to read mp3 file tags

Question

Hi all,

I want to have a program (might be an idea for simple program), to read metadata from a Mp3 file.

My program should also able to edit these meta data. what can i do?

I got to search out for some open source code. But they have code; but not simplified idea for my job they are going to do.

When i read further i found there are thing stored in the MP3 file itself. But i am not able to make a 360 degree of idea of my baby program.

any help will be appreciated; with a program or very idea(like algorithm ). :)

Answer 1

http://www.id3.org/Implementations would be a good place to start

Answer 2

The last 128 bytes of a mp3 file contains meta data about the mp3 file., You can write a program to read the last 128 bytes...

UPDATE:

ID3v1 Implementation

The Information is stored in the last 128 bytes of an MP3. The Tag has got the following fields, and the offsets given here, are from 0-127.

 Field      Length    Offsets
 Tag        3           0-2
 Songname   30          3-32
 Artist     30         33-62
 Album      30         63-92
 Year       4          93-96
 Comment    30         97-126
 Genre      1           127

WARINING- This is just an ugly way of getting metadata and it might not actually be there because the world has moved to id3v2. id3v1 is actually obsolete. Id3v2 is more complex than this, so ideally you should use existing libraries to read id3v2 data from mp3s . Just putting this out there.

Answer 3

jd3lib is a Java library that handles MP3s, and their tags. Probably a useful starting point.