python音频文件中pcm格式提取

https://ffmpeg.org/download.html#build-windows
#选择对于系统
如果是windows直接访问一下连接
https://github.com/BtbN/FFmpeg-Builds/releases
选择xxx-shared.zip
https://github.com/BtbN/FFmpeg-Builds/releases/download/autobuild-2020-09-27-12-31/ffmpeg-N-99395-ga3a6b56200-win64-gpl-shared.zip
#再解压把ffmpeg.exe所在路径配置环境变量中

ffmpeg -i 1.mp3 -f s16be -ar 16000 -ac 1 -acodec pcm_s16be 1.pcm

from ffmpy import FFmpeg

#将mp3转化没pcm
ff = FFmpeg(inputs={r'd:\test\1.mp3':"-i"},
           outputs={r'd:\test\1.pcm':"-f s16be -ar 16000 -ac 1 -acodec pcm_s16be"})

print(ff.cmd)
ff.run()

#将pcm转化为mp3
ff1 = FFmpeg(inputs={r'd:\test\1.pcm':"-f s16be -ar 16000 -ac 1 -acodec pcm_s16be"},
           outputs={r'd:\test\1.mp3':None})

print(ff1.cmd)
ff1.run()

参数说明：https://blog.csdn.net/weixin_33890499/article/details/88708622