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。
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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()
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原文链接：https://blog.csdn.net/vitA_gsm/article/details/99756032