python将音频进行变速的操作方法

import os
import sys
from ffmpeg import audio
audio_path = "D:\\audio\\" 
finish_path = "D:\\2x_audio\\"
 
def run():
 audio_file = os.listdir(audio_path)
 for i, audio1 in enumerate(audio_file):
  print(audio_path+audio1)
  audio.a_speed(audio_path+audio1, "2", finish_path+"2x"+audio1)
run()

import subprocess
 
# 调整音频播放速率
def a_speed(input_file, speed, out_file):
 try:
  cmd = "ffmpeg -y -i %s -filter_complex \"atempo=tempo=%s\" %s" % (input_file, speed, out_file)
  res = subprocess.call(cmd, shell=True)
 
  if res != 0:
   return False
  return True
 except Exception:
  return False

import os
import sys
#from ffmpeg import audio
 
audio_path = "D:\\audio\\" 
finish_path = "D:\\2x_audio\\"
 
def run():
 audio_file = os.listdir(audio_path)
 for i, audio1 in enumerate(audio_file):
  #print(audio_path+audio1)
  cmd="ffmpeg -n -i "+audio_path+audio1+" -filter:a atempo=2 "+finish_path+"2x"+audio1
  #print(cmd)
  os.system(cmd)
  #audio.a_speed(audio_path+audio1, "2", finish_path+"2x"+audio1)
run()