python对批量WAV音频进行等长分割的方法实现

对批量WAV音频进行等长分割

对WAV格式的音频以相同长度进行分割。

import os
import wave
import numpy as np
import pylab as plt
import librosa

path = r"D:\cutaudio\test"
files = os.listdir(path)
files = [path + "\\" + f for f in files if f.endswith('.wav')]
CutTime = 4 #单位长度4s

def CutAudios():
 for i in range(len(files)):
   FileName = files[i]
   f = wave.open(r"" + FileName, 'rb')
   params = f.getparams() #读取音频文件信息
   nchannels, sampwidth, framerate, nframes = params[:4] #声道数, 量化位数, 采样频率, 采样点数  
   str_data = f.readframes(nframes)
   f.close()

wave_data = np.frombuffer(str_data, dtype=np.short)
   #根据声道数对音频进行转换
   if nchannels > 1:
       wave_data.shape = -1, 2
       wave_data = wave_data.T
       temp_data = wave_data.T
   else:
       wave_data = wave_data.T
       temp_data = wave_data.T

CutFrameNum = framerate * CutTime
   Cutnum =nframes/CutFrameNum #音频片段数
   StepNum = int(CutFrameNum)
   StepTotalNum = 0

for j in range(int(Cutnum)):
     FileName = r"D:\cutaudio\11\\" + files[i][-17:-4] +"-"+ str(j) + ".wav"
     temp_dataTemp = temp_data[StepNum * (j):StepNum * (j + 1)]
     StepTotalNum = (j + 1) * StepNum
     temp_dataTemp.shape = 1, -1
     temp_dataTemp = temp_dataTemp.astype(np.short)# 打开WAV文档
     f = wave.open(FileName, 'wb')
     # 配置声道数、量化位数和取样频率
     f.setnchannels(nchannels)
     f.setsampwidth(sampwidth)
     f.setframerate(framerate)
     f.writeframes(temp_dataTemp.tostring()) # 将wav_data转换为二进制数据写入文件
     f.close()

if __name__ == '__main__' :
 CutAudios()

来源：https://blog.csdn.net/vitA_gsm/article/details/99756032