[Python]오디오 파일 형식 변환

오디오 파일 형식 변환

• ffmpeg, pydub

1. ffmpeg

: 동영상/오디오 조작 multimedia framework

ffmpeg 설치

• https://angelplayer.tistory.com/351

quick start

• https://opensource.com/article/17/6/ffmpeg-convert-media-file-formats

사용법

• https://dataanalytics.tistory.com/entry/%ED%8C%8C%EC%9D%B4%EC%8D%AC-ffmpeg-%EC%84%A4%EC%B9%98-%EB%B0%8F-%EB%8B%A4%EC%9A%B4%EB%A1%9C%EB%93%9C-cv2-%EC%9D%B4%EB%AF%B8%EC%A7%80-%EB%8F%99%EC%98%81%EC%83%81-%EB%B3%80%ED%99%98
• https://macgyvering.tistory.com/144

2. pydub

from pydub import AudioSegment

sound = AudioSegment.from_file("input-file.mp3")
sound.export("output-file.aac", format="aac", bitrate="128k")

https://audiosegment.readthedocs.io/en/latest/audiosegment.html

• https://github.com/jiaaro/pydub/issues/363

활용

# pip install pydub; http://pydub.com/, https://github.com/jiaaro/pydub/
# install ffmpeg; https://angelplayer.tistory.com/351; http://www.ffmpeg.org/general.html#File-Formats

# pydub 사용 전, ffmpeg 환경변수 설정 필요

from pydub import AudioSegment
#from pydub.playback import play
import sys


def mp3_2_wav(input_file, output_extension):
    sound = AudioSegment.from_mp3(input_file)
    #play(sound)
    sound.export(output_file_name + '.' + output_extension, format = output_extension)

def mp3_2_opus(input_file, output_extension):
    sound = AudioSegment.from_mp3(input_file)
    sound.export(output_file_name + '.' + output_extension, format = output_extension)
    
def mp3_2_aac(input_file, output_extension):
    sound = AudioSegment.from_mp3(input_file)
    sound.export(output_file_name + '.' + output_extension, format = 'adts') #https://github.com/jiaaro/pydub/issues/363
    

if __name__ == '__main__':

    input_file = sys.argv[1]
    input_file_name = input_file.split('.')[0]
    input_extension = input_file.split('.')[-1]

    output_file_name = input_file_name
    output_extension = sys.argv[2]
    
    if input_extension == 'mp3':
        if output_extension == 'wav':
            mp3_2_wav(input_file, output_extension)        
        elif output_extension == 'opus':
            mp3_2_opus(input_file, output_extension)
        elif output_extension == 'aac':
            mp3_2_aac(input_file, output_extension)

• https://colinch4.github.io/2023-09-07/14-50-53-840015/