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codecaine · (This post was last modified: 01-14-2010 01:54 PM by codecaine.)

I was on the wiki for mp3s and I saw that the last 128 bytes of a mp3 is the tag information. So I made a script to get the tag information. The code is also attached in a zip.

Code:

#This program was coded by codecaine aka "Jerome Scott II"

import sys;

import os;

#check if the user inputed a argument

if len(sys.argv) < 1:

    print('Error: No mp3 file given as a argument');

    sys.exit(1);

#holds the file extension to check if the file is a mp3

fileExtension = sys.argv[1][-3:];

#check if the file is a mp3

if fileExtension != 'mp3':

    print('Error: This program only reads mp3s');

    sys.exit(1)

#Hold the location of the last 128 bytes a mp3

last128 = os.path.getsize(sys.argv[1]) - 128;

#read mp3 in binary mode

f = open(sys.argv[1],'rb')

#go to the last 128 bytes in the file

f.seek(last128);

#read 3 bytes for the tag

tag = f.read(3);

#read 30 bytes for title

title = f.read(30);

#read 30 bytes for artist name

artist = f.read(30);

#read 30 bytes for album name

album = f.read(30);

#read 4 bytes the year of album

year = f.read(4);

#read 30 bytes for mp3 comment

comment = f.read(30);

#read 1 byte for the genre

genre = ord(f.read(1));

#close the file

f.close();

print('########################################################');

#print the mp3 file name without directory path

print('Filename: ' + os.path.basename(f.name));

#print mp3 tag information

print('Title: ' + title);

print('Artist: ' + artist);

print('Album: ' + album);

print('Year: ' + year);

print('Comment: ' + comment);

print('Genre: ' + str(genre));

print('########################################################');

***Back_track*** · 01-14-2010, 01:23 PM

Now this is a great example to show what python can do!

Alphablend · 01-14-2010, 10:20 PM

OMG i have to check this out!

a little help please. which python are you using? mine is 2.5.4 and i hope there wont be any type missmatch.
and, why do i get this message?

Code:

Traceback (most recent call last):

  File "C:\Documents and Settings\Radic\Desktop\mp3TagReader.py", line 12, in <module>

    fileExtension = sys.argv[1][-3:];

IndexError: list index out of range

codecaine · 01-15-2010, 02:32 AM

I had reposted the source I had that sys.argv to check if the user enter the mp3 on the command line. to use the program you have to do it like so:

python mp3TagReader.py c:\myfile.mp3

if you don't put the mp3 path and file name on the command line you get a error. because then the system argument is 0 but with the repost it tell you you about it instead of the error

Alphablend · 01-16-2010, 12:24 AM

Oh I see. Thanks.

codecaine · 01-16-2010, 02:35 AM

You put you python in you system environment variables? so its global you can run python anywhere in terminal?

Alphablend · 01-16-2010, 10:47 PM

(01-16-2010 02:35 AM)codecaine Wrote: You put you python in you system environment variables? so its global you can run python anywhere in terminal?

i think i saw a thread about it. i will look up for it...

codecaine · 01-17-2010, 04:50 AM

If you install this python it should automatic set environment variables and win32api http://www.activestate.com/activepython/