Python对wav文件的重采样实例
例如从2channel，4.41khz重采样到1channel，16khz
defdownsampleWav(src,dst,inrate=44100,outrate=16000,inchannels=2,outchannels=1):
importos,wave,audioop
ifnotos.path.exists(src):
print('Sourcenotfound!')
returnFalse
ifnotos.path.exists(os.path.dirname(dst)):
os.makedirs(os.path.dirname(dst))
try:
s_read=wave.open(src,'r')
s_write=wave.open(dst,'w')
except:
print('Failedtoopenfiles!')
returnFalse
n_frames=s_read.getnframes()
data=s_read.readframes(n_frames)
try:
converted=audioop.ratecv(data,2,inchannels,inrate,outrate,None)
ifoutchannels==1:
converted=audioop.tomono(converted[0],2,1,0)
except:
print('Failedtodownsamplewav')
returnFalse
try:
s_write.setparams((outchannels,2,outrate,0,'NONE','Uncompressed'))
s_write.writeframes(converted)
except:
print('Failedtowritewav')
returnFalse
try:
s_read.close()
s_write.close()
except:
print('Failedtoclosewavfiles')
returnFalse
returnTrue
若in和out都是单通道：
defdownsampleWav(src,dst,inrate=48000,outrate=16000,inchannels=1,outchannels=1):
importos,wave,audioop
ifnotos.path.exists(src):
print('Sourcenotfound!')
returnFalse
ifnotos.path.exists(os.path.dirname(dst)):
os.makedirs(os.path.dirname(dst))
try:
s_read=wave.open(src,'rb')
params=s_read.getparams()
nchannels,sampwidth,framerate,nframes=params[:4]
print(nchannels,sampwidth,framerate,nframes)
s_write=wave.open(dst,'wb')
except:
print('Failedtoopenfiles!')
returnFalse
n_frames=s_read.getnframes()
data=s_read.readframes(n_frames)
try:
converted=audioop.ratecv(data,2,inchannels,inrate,outrate,None)
ifoutchannels==1andinchannels!=1:
converted=audioop.tomono(converted[0],2,1,0)
except:
print('Failedtodownsamplewav')
returnFalse
try:
s_write.setparams((outchannels,2,outrate,0,'NONE','Uncompressed'))
s_write.writeframes(converted[0])
exceptExceptionase:
print(e)
print('Failedtowritewav')
returnFalse
try:
s_read.close()
s_write.close()
except:
print('Failedtoclosewavfiles')
returnFalse
returnTrue
方案二
y为下采样的结果，类型np.ndarray
YoucanuseLibrosa'sload()function,
importlibrosa
y,s=librosa.load('test.wav',sr=8000)#Downsample44.1kHzto8kHz
TheextraefforttoinstallLibrosaisprobablyworththepeaceofmind.
Pro-tip:wheninstallingLibrosaonAnaconda,youneedtoinstallffmpegaswell,so
pipinstalllibrosa
condainstall-cconda-forgeffmpeg
以上这篇Python对wav文件的重采样实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持毛票票。
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