LAMEでWAVをまとめてMP3にするスクリプト（古いもの）

lame.py

# lame.py
# Convert WAV files into MP3 format by using LAME.
# Copyright (C) 2010/06/11~ by Odashi.

import os
import sys
import subprocess

# Global settings
LAME_PATH       = '"C:\\Program Files\\LAME\\lame.exe"'
DIR_SEPARATOR   = '\\'
DEFAULT_SETTING = { 'quality': 2, 'bitrate': 128, 'del_infile': False, 'recursive': False }

# Divide arguments
def splitargv(argv):
	setting = {}
	i = 1
	while i < len(argv):
		if len(argv[i]) <= 2:
			break
		if argv[i][0:2] != '--':
			break
		keylist = argv[i].lstrip('-').split('=', 1)
		if len(keylist) == 2:
			setting[keylist[0]] = keylist[1]
		else:
			setting[keylist[0]] = True
		i += 1
	return setting, argv[i:len(argv)]

# Merge settings
def merge(user_setting):
	setting = DEFAULT_SETTING
	if isinstance(user_setting, dict):
		for key in user_setting.keys():
			setting[key] = user_setting[key]
	return setting

# Convert an audio file into MP3 format
def lame(infile, outfile, setting = None):
	# Make command
	command = LAME_PATH
	command += ' -q ' + str(setting['quality'])
	command += ' -b ' + str(setting['bitrate'])
	command += ' "' + infile + '"'
	command += ' "' + outfile + '"'
	# Show information
	print('=' * 80)
	print('inflie  : ' + infile)
	print('outfile : ' + outfile)
	# Execute LAME
	print('-' * 40)
	print('Execute LAME ...')
	print(command)
	print('')
	retcode = subprocess.call(command)
	print('')
	print('Lame Return Code: ' + str(retcode))
	if retcode != 0:
		print('LAME Error occered.')
		print('')
		return False
	# Remove input file
	print('-' * 40)
	if setting['del_infile']:
		print('Removing "' + infile + '" ...')
		os.remove(infile)
	else:
		print('"' + infile + '" was kept.')
	print('')
	return True

# Convert all WAV files in a directory into MP3 format
def dirlame(directory, setting):
	# Check if directory exists
	if not os.path.isdir(directory):
		print('"' + directory + '" is not such a directory.')
		return False
	# Search
	for path, dirs, files in os.walk(directory):
		# If "--recursive" is not selected, this program doesn't search sub directory.
		if path != directory and not setting['recursive']:
			break
		# Find ".wav" extended file
		for filename in files:
			root, ext = os.path.splitext(filename)
			if ext != '.wav':
				continue
			outfile = root + '.mp3'
			# Convert
			if not lame(path + DIR_SEPARATOR + filename, path + DIR_SEPARATOR + outfile, setting):
				return False
	return True

# Manual
def manual():
	print('Usage   : ' + sys.argv[0] + ' [options] <directories>')
	print('Options :')
	print('  --bitrate=<num> : Set MP3 bitrate[kbps]. default:' + str(DEFAULT_SETTING['bitrate']))
	print('  --quality=<num> : Set MP3 quality(0-9). default:' + str(DEFAULT_SETTING['quality']))
	print('  --del_infile    : Delete input .wav file after convertion finished.')
	print('  --recursive     : Search all sub directories too.')

# Main routine
def main():
	if len(sys.argv) == 1:
		manual()
		return
	setting, argv = splitargv(sys.argv)
	setting = merge(setting)
	if argv == []:
		print('No any target directories.')
		return
	# Run "dirlame" every directories
	for directory in argv:
		if not dirlame(directory, setting):
			print('Some error occured.')
			return
	print('Convert finished completely.')

main()