Splitty splits an audio file into tracks, given the track list with start times. It uses ffmpeg.

splitty.py

import ffmpy
import re
import os
import sys
import getopt


def get_opts(argv):
	usage_msg = '{} -i <inputfile> -t <tracks> -o <outputfolder>'.format(__file__)
	try:
		opts, args = getopt.getopt(argv,"hi:t:o:",["ifile=","tracks=", "ofolder="])
	except getopt.GetoptError:
		print(usage_msg)
		sys.exit(2)
	inputfile = ""
	tracklist = ""
	outputfolder = ""
	for opt, arg in opts:
		if opt == '-h':
			print(usage_msg)
			sys.exit()
		elif opt in ("-i", "--ifile"):
			inputfile = arg
		elif opt in ("-t", "--tracks"):
			tracklist = arg
		elif opt in ("-o", "--ofolder"):
			outputfolder = arg

	return inputfile, tracklist, outputfolder


if __name__=='__main__':
	inputfile, tracklist, outputfolder = get_opts(sys.argv[1:])
	cwd = os.getcwd()
	inputfile = os.path.join(cwd, inputfile)
	tracklist = os.path.join(cwd, tracklist)
	outputfolder = os.path.join(cwd, outputfolder)
	os.makedirs(outputfolder, exist_ok=True)

	# open txt file with youtube track list (with start times)
	with open(tracklist, 'r') as tracks_file:
		tracks = tracks_file.readlines()

	time_pattern = re.compile("\d*\d*:*\d*\d:\d\d")
	time_zeros = '00:00:00'

	for idx, t in enumerate(tracks):
		# set start time
		if idx == 0:
			try:
				start_raw = re.search(time_pattern, t).group()
			except:
				start_raw = ''
			start = time_zeros
		else:
			start_raw = re.search(time_pattern, t).group()
			# format time to HH:MM:SS
			start = time_zeros[0:-len(start_raw)] + start_raw

		# set end time
		if idx < (len(tracks) - 1):
			end_raw = re.search(time_pattern, tracks[idx + 1]).group()
			# format HH:MM:SS
			end = time_zeros[0:-len(end_raw)] + end_raw
		else:
			end = '9999999999'
			end_raw = end

		track_name = t.replace(start_raw, '').strip('\n').replace('()', '')

		mp3_track_fullpath = os.path.join(outputfolder, track_name + '.mp3')

		extract_track = ffmpy.FFmpeg(
				inputs={inputfile: None},
				outputs={mp3_track_fullpath: ['-acodec', 'copy', '-to', end, '-ss', start]}
		)
		extract_track.run()