Saya menemukan mac
(yang merupakan perintah yang shntool
digunakan untuk decoding file APE) jauh lebih toleran daripada ffmpeg
jika file sumber mengandung kesalahan kecil.
Biasanya ffmpeg
masih akan mengkonversi file sepenuhnya sementara mac
sangat mungkin menimbulkan kesalahan selama pemrosesan.
Jadi saya akhirnya menulis skrip untuk memisahkan file APE dengan mem-parsing file CUE dan mengonversi file APE ke file FLAC dipisahkan oleh judul menggunakan ffmpeg:
#!/usr/bin/env python2.7
import subprocess as subp
import sys
import os
from os.path import splitext, basename
import random
import glob
records = []
filename = ""
album=''
alb_artist=''
codec = 'flac'
ffmpeg_exec = 'ffmpeg'
encodingList = ('utf-8','euc-kr', 'shift-jis', 'cp936', 'big5')
filecontent = open(sys.argv[1]).read()
for enc in encodingList:
try:
lines = filecontent.decode(enc).split('\n')
encoding = enc
break
except UnicodeDecodeError as e:
if enc == encodingList[-1]:
raise e
else:
pass
for l in lines:
a = l.split()
if not a:
continue
if a[0] == "FILE":
filename = ' '.join(a[1:-1]).strip('\'"')
elif a[0]=='TRACK':
records.append({})
records[-1]['index'] = a[1]
elif a[0]=='TITLE':
if len(records)>0:
records[-1]['title'] = ' '.join(a[1:]).strip('\'"')
else:
album = ' '.join(a[1:]).strip('\'"')
elif a[0]=='INDEX' and a[1]=='01':
timea = a[2].split(':')
if len(timea) == 3 and int(timea[0]) >= 60:
timea.insert(0, str(int(timea[0])/60))
timea[1] = str(int(timea[1])%60)
times = '{0}.{1}'.format(':'.join(timea[:-1]), timea[-1])
records[-1]['start'] = times
elif a[0]=='PERFORMER':
if len(records)>1:
records[-1]['artist'] = ' '.join(a[1:]).strip('\'"')
else:
alb_artist = ' '.join(a[1:]).strip('\'"')
for i, j in enumerate(records):
try:
j['stop'] = records[i+1]['start']
except IndexError:
pass
if not os.path.isfile(filename):
tmpname = splitext(basename(sys.argv[1]))[0]+splitext(filename)[1]
if os.path.exists(tmpname):
filename = tmpname
del tmpname
else:
for ext in ('.ape', '.flac', '.wav', '.mp3'):
tmpname = splitext(filename)[0] + ext
if os.path.exists(tmpname):
filename = tmpname
break
if not os.path.isfile(filename):
raise IOError("Can't not find file: {0}".format(filename))
fstat = os.stat(filename)
atime = fstat.st_atime
mtime = fstat.st_mtime
records[-1]['stop'] = '99:59:59'
if filename.lower().endswith('.flac'):
tmpfile = filename
else:
tmpfile = splitext(filename)[0] + str(random.randint(10000,90000)) + '.flac'
try:
if filename != tmpfile:
ret = subp.call([ffmpeg_exec, '-hide_banner', '-y', '-i', filename,
'-c:a', codec,'-compression_level','12','-f','flac',tmpfile])
if ret != 0:
raise SystemExit('Converting failed.')
for i in records:
output = i['index'] +' - '+ i['title']+'.flac'
commandline = [ffmpeg_exec, '-hide_banner',
'-y', '-i', tmpfile,
'-c', 'copy',
'-ss', i['start'], '-to', i['stop'],
'-metadata', u'title={0}'.format(i['title']),
'-metadata', u'artist={0}'.format(i.get('artist', '')),
'-metadata', u'performer={0}'.format(i.get('artist', '')),
'-metadata', u'album={0}'.format(album),
'-metadata', 'track={0}/{1}'.format(i['index'], len(records)),
'-metadata', u'album_artist={0}'.format(alb_artist),
'-metadata', u'composer={0}'.format(alb_artist),
'-metadata', 'encoder=Meow',
'-write_id3v1', '1',
output]
ret = subp.call(commandline)
if ret == 0:
os.utime(output, (atime, mtime))
finally:
if os.path.isfile(tmpfile):
os.remove(tmpfile)