split mp3 in 20 min intervals using mp3splt

mp3_split.py

"""
    install mp3splt http://mp3splt.sourceforge.net/mp3splt_page/home.php
    add to environment variable PATH=>C:\Program Files (x86)\mp3splt or
    save and run this file from that location
"""

import os
import glob
from subprocess import call

class Mp3Split:
    def __init__(self):
        self.DIRECTORY = "A:\\Directory\\Where\\Your\\Files\\Are"
        # change to whatever you want {} is for disc number
        self.new_file_name = "new_file_name_{}" 
        self.output_dir = self.DIRECTORY + "output"

    def create_output_directory(self):
        if not os.path.exists(self.output_dir):
            os.makedirs(self.output_dir)

    def get_files(self):
        return glob.glob(self.DIRECTORY + "*.mp3")

    def get_new_file_name(self, disc_number):
        return self.new_file_name.format(disc_number)

    def get_cmd(self, mp3, output_name):
        return " ".join([
            "mp3splt",
            "\"{0}\"".format(mp3),
            "-g",
            "r%[@N=0,@t=\"{0}_@N\"]".format(output_name),
            "-d",
            "\"{0}\"".format(self.output_dir),
            "-o",
            "\"{0}_@n\"".format(output_name),
            "-t",
            "20.0"
        ])

    def split_files(self):
        files = self.get_files()

        for disc_number, mp3 in enumerate(files, start=1):
            output_name = self.get_new_file_name(disc_number)
            command = self.get_cmd(mp3, output_name)
            print command
            call(command)

    def main(self):
        self.create_output_directory()
        self.split_files()

if __name__ == "__main__":
    split = Mp3Split()
    split.main()