python对批量WAV音频进行等长分割的方法实现
(编辑:jimmy 日期: 2024/11/17 浏览:3 次 )
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()
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