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PythonでflacをaacやALACに変換する。

Posted at

flac形式がiphone対応してないため、変換するツール作りたい。

事前準備

pydubとffmpegをインストールする。

開発環境は以下

  • Windows10 64bit Pro
  • VS Code

実装

from pydub import AudioSegment

sound = AudioSegment.from_file("C:/Project/audio/music.flac", format="flac")
# AAC形式への変換
sound.export("convert320k.m4a", format="ipod", codec="aac", bitrate="320K")
# ALAC(AppleLossless)形式への変換
sound.export("convert.alac", format="ipod", codec="alac")

はまった点

formatにalacを指定するとエラーとなり、ffmpeg側から怒られた。
mp3ならmp3で通るので拡張子と同じ設定だなと思いこみで、半日潰れた。

    sound.export("convert.alac", format="alac", codec="alac") # NG
    sound.export("convert.alac", format="ipod", codec="alac") # OK

参考

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