使用python减小音频剪辑的音量时出错

Question

我尝试使用pydub 降低或提高音频剪辑的音量。 但是当我这样做时，它给出了以下错误。

 c:/Users/KalyanDk/vsprojects/Games/playsound.py
C:\Users\KalyanDk\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pydub\utils.py:165: RuntimeWarning: Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work
  warn("Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work", RuntimeWarning)
C:\Users\KalyanDk\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pydub\utils.py:179: RuntimeWarning: Couldn't find ffplay or avplay - defaulting to ffplay, but may not work
  warn("Couldn't find ffplay or avplay - defaulting to ffplay, but may not work", RuntimeWarning)
Traceback (most recent call last):
  File "c:/Users/KalyanDk/vsprojects/Games/playsound.py", line 12, in <module>
    play(louder_song)
  File "C:\Users\KalyanDk\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pydub\playback.py", line 71, in play
    _play_with_ffplay(audio_segment)
  File "C:\Users\KalyanDk\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pydub\playback.py", line 18, in _play_with_ffplay
    seg.export(f.name, "wav")
  File "C:\Users\KalyanDk\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pydub\audio_segment.py", line 780, in export
    out_f = _fd_or_path_or_tempfile(out_f, 'wb+')
  File "C:\Users\KalyanDk\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pydub\utils.py", line 57, in _fd_or_path_or_tempfile
    fd = open(fd, mode=mode)
PermissionError: [Errno 13] Permission denied: 'C:\\Users\\KalyanDk\\AppData\\Local\\Temp\\tmposf_nhdb.wav'

我不明白出了什么问题..这是我的代码

from pydub import AudioSegment
from pydub.playback import play

song = AudioSegment.from_wav("Bounce.wav")

louder_song = song + 6

quieter_song = song - 3

play(louder_song)

louder_song.export("Bounce.wav", format='wav')'''

并且音频文件在当前python文件所在的同一个文件夹中。

Answer 1

尝试安装 simpleaudio：pip install simpleaudio

Pydub 在整个程序中多次使用NamedTemporaryFile，包括在 play() 方法中。 NamedTemporaryFile 处理基本文件操作的方式在平台之间存在一些明显的不一致。我相信 simpleaudio 将绕过在 play() 方法中调用 NamedTemporaryFile 的代码，尽管我不清楚这是否解决了 pydub 中所有 NamedTemporaryFile 实例的问题。不过，Simpleaudio 确实为我解决了这个问题 - 无需配置，只需安装即可。

参考： https://github.com/jiaaro/pydub/issues/343