나는 오디오 파일 사이의 상관 관계를 도입하지 않기 때문에 Neil의 대답이 가장 마음에 들었습니다. 단 하나의 게인 레벨을 선택하고 모든 것을 조정하십시오.
그러나 나는 가지고 normalize-ogg있는 일부 파일 의 출력을 구문 분석하는 데 문제가있었습니다 . 또한 하나의 불쾌한 문제가 있습니다 bc: 실제 반올림을하지 않고 잘립니다.
그래서 결국 쉘 스크립팅을 포기하고 파이썬으로 옮겼습니다.
참고 1 : exiftool 부분은 과잉 일 수 있지만 원래 비트 전송률이 유지되도록 100 % 확신하고 싶었습니다.
참고 2 : 원본을 덮어 쓰므 로 보존하려는 경우 normalize-ogg에 대한 마지막 호출에서 --backup을 사용하십시오. 그러나 사본을 별도의 안전한 디렉토리에 보관하는 것이 더 실용적이라는 것을 알았습니다.
참고 3 : 이 솔루션은 ogg 파일을 처리하지만 mp3에 맞게 수정하는 것은 쉽지 않습니다. "ogg"를 "mp3"으로 대체하십시오.
여기에 문제가 있습니다. 최신 버전은 여기에서 찾을 수 있습니다 : regain.py
#!/usr/bin/python3
"""
Parallel normalize gains
"""
'
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
'
# Absolute value, in dB for the desired gain of each file
TARGET_GAIN = -12
#
MAX_THREADS = 2
from subprocess import Popen, PIPE
from multiprocessing.dummy import Pool as ThreadPool
from os import listdir
import logging
def initlogger(logfile="log.log", mainlevel=logging.DEBUG,
filelevel=logging.DEBUG, consolelevel=logging.DEBUG):
'''initlogger'''
# create logger
logger = logging.getLogger()
logger.setLevel(mainlevel)
# create file handler which logs even debug messages
fh = logging.FileHandler(logfile)
fh.setLevel(filelevel)
# create console handler also logging at DEBUG level
ch = logging.StreamHandler()
ch.setLevel(consolelevel)
# create formatter and add it to the handlers
formatter = logging.Formatter("%(asctime)s [%(threadName)-12.12s] [%(levelname)-5.5s] %(message)s")
fh.setFormatter(formatter)
ch.setFormatter(formatter)
# add the handlers to the logger
logger.addHandler(fh)
logger.addHandler(ch)
def logcommand(command=[]):
'''logcommand'''
if not isinstance(command, list):
return "", "", -1
logging.info("Command:\n" + " ".join(command) + "\n")
proc = Popen(command, stdin=PIPE, stdout=PIPE, stderr=PIPE)
output, err = proc.communicate()
output = output.decode("utf-8")
err = err.decode("utf-8")
logging.info("Output:\n" + output + "\n")
logging.info("Error:\n" + err + "\n")
logging.info("Return Code:\n" + str(proc.returncode) + "\n")
return output, err, proc.returncode
def regain(target):
'''regain'''
logging.info("============================ Start File ============================")
logging.warning(target["name"])
logging.info("Extracting gain info.\n")
commandgetlevels = ['normalize-ogg', '-n', target["name"]]
output, err, retcode = logcommand(commandgetlevels)
level = output.split()[0]
logging.debug("Level: " + level)
if "dBFS" in level:
level = level.split("dBFS")[0]
level = level.replace(',', '.')
level = int(round(float(level)))
delta = target["gain"] - level
logging.info("Required adjustment: " + str(delta) + "\n")
if delta is 0:
logging.warning(target["name"] + " is already at the correct level")
return 0
logging.info("Extracting average bitrate.\n")
commandgetinfo = ['exiftool', target["name"]]
output, err, retcode = logcommand(commandgetinfo)
bitrate = '0'
for line in output.split('\n'):
if 'Nominal Bitrate' in line:
bitrate = line.split(':')[1].split()[0]
break
logging.info("Average bitrate is: " + str(bitrate) + "\n")
if bitrate is '0':
logging.error("No valid bitrate found, aborting conversion.\n")
exit(-1)
logging.info("Re-normalizing.\n")
commandrenormalize = ['normalize-ogg', '--ogg', '--bitrate', bitrate,
'-g', str(delta) + 'db', target["name"]]
output, err, retcode = logcommand(commandrenormalize)
if retcode is not 0:
log.error("Output:\n" + output)
log.error("err:\n" + err)
exit(retcode)
return retcode
# function to be mapped over
def parallelregain(gain=TARGET_GAIN, threads=MAX_THREADS):
'''parallelregain'''
logging.info("Creating thread pool with " + str(threads) + " elements.\n")
pool = ThreadPool(threads)
targets = []
files_list = listdir(".")
files_list.sort()
counter = 0
for filename in files_list:
if filename.endswith("ogg"):
target = {
"name":filename,
"gain":gain,
}
targets.append(target)
counter = counter + 1
pool.map(regain, targets)
pool.close()
pool.join()
if __name__ == "__main__":
initlogger(logfile="normalize.log", consolelevel=logging.WARNING)
parallelregain()
