如何解决错误：未知格式：3尝试读取音频wavfile时
我正在尝试使用下面显示的以下功能清除音频并对其进行降采样。我陷入了我不了解的错误。有人愿意解释并希望能帮助我解决此问题吗？
我看到它与wavio功能有关，并且无法读取文件。
以下代码：
def envelope(y,rate,threshold):
mask = []
y = pd.Series(y).apply(np.abs)
y_mean = y.rolling(window=int(rate/20),min_periods=1,center=True).max()
for mean in y_mean:
if mean > threshold:
mask.append(True)
else:
mask.append(False)
return mask,y_mean
def downsample_mono(path,sr):
obj = wavio.read(path)
wav = obj.data.astype(np.float32,order='F')
rate = obj.rate
try:
tmp = wav.shape[1]
wav = to_mono(wav.T)
except:
pass
wav = resample(wav,sr)
wav = wav.astype(np.int16)
return sr,wav
def save_sample(sample,target_dir,fn,ix):
fn = fn.split('.wav')[0]
dst_path = os.path.join(target_dir.split('.')[0],fn+'_{}.wav'.format(str(ix)))
if os.path.exists(dst_path):
return
wavfile.write(dst_path,sample)
def check_dir(path):
if os.path.exists(path) is False:
os.mkdir(path)
def split_wavs(args):
src_root = args.src_root
dst_root = args.dst_root
dt = args.delta_time
wav_paths = glob('{}/**'.format(src_root),recursive=True)
wav_paths = [x for x in wav_paths if '.wav' in x]
dirs = os.listdir(src_root)
check_dir(dst_root)
classes = os.listdir(src_root)
for _cls in classes:
target_dir = os.path.join(dst_root,_cls)
check_dir(target_dir)
src_dir = os.path.join(src_root,_cls)
for fn in tqdm(os.listdir(src_dir)):
src_fn = os.path.join(src_dir,fn)
rate,wav = downsample_mono(src_fn,args.sr)
mask,y_mean = envelope(wav,threshold=args.threshold)
wav = wav[mask]
delta_sample = int(dt*rate)
# cleaned audio is less than a single sample
# pad with zeros to delta_sample size
if wav.shape[0] < delta_sample:
sample = np.zeros(shape=(delta_sample,),dtype=np.int16)
sample[:wav.shape[0]] = wav
save_sample(sample,0)
# step through audio and save every delta_sample
# discard the ending audio if it is too short
else:
trunc = wav.shape[0] % delta_sample
for cnt,i in enumerate(np.arange(0,wav.shape[0]-trunc,delta_sample)):
start = int(i)
stop = int(i + delta_sample)
sample = wav[start:stop]
save_sample(sample,cnt)
def test_threshold(args):
src_root = args.src_root
wav_paths = glob('{}/**'.format(src_root),recursive=True)
wav_path = [x for x in wav_paths if args.fn in x]
if len(wav_path) != 1:
print('audio file not found for sub-string: {}'.format(args.fn))
return
rate,wav = downsample_mono(wav_path[0],args.sr)
mask,env = envelope(wav,threshold=args.threshold)
plt.style.use('ggplot')
plt.title('Signal Envelope,Threshold = {}'.format(str(args.threshold)))
plt.plot(wav[np.logical_not(mask)],color='r',label='remove')
plt.plot(wav[mask],color='c',label='keep')
plt.plot(env,color='m',label='envelope')
plt.grid(False)
plt.legend(loc='best')
plt.show()
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='Cleaning audio data')
parser.add_argument('--src_root',type=str,default='Audio Data/Ordered Files',help='directory of audio files in total duration')
parser.add_argument('--dst_root',default='Audio Data/Clean Audio',help='directory to put audio files split by delta_time')
parser.add_argument('--delta_time','-dt',type=float,default=2.0,help='time in seconds to sample audio')
parser.add_argument('--sr',type=int,default=44100,help='rate to downsample audio')
parser.add_argument('--fn',default='HBJQWAO',help='file to plot over time to check magnitude')
parser.add_argument('--threshold',default=20,help='threshold magnitude for np.int16 dtype')
args,_ = parser.parse_known_args()
test_threshold(args)
#split_wavs(args)
错误：
Error Traceback (most recent call last)
<ipython-input-16-97e9b68095c0> in <module>()
17 args,_ = parser.parse_known_args()
18
---> 19 test_threshold(args)
20 #split_wavs(args)
6 frames
<ipython-input-14-fe4eeabe5e06> in test_threshold(args)
85 print('audio file not found for sub-string: {}'.format(args.fn))
86 return
---> 87 rate,args.sr)
88 mask,threshold=args.threshold)
89 plt.style.use('ggplot')
<ipython-input-14-fe4eeabe5e06> in downsample_mono(path,sr)
14
15 def downsample_mono(path,sr):
---> 16 obj = wavio.read(path)
17 wav = obj.data.astype(np.float32,order='F')
18 rate = obj.rate
/usr/local/lib/python3.6/dist-packages/wavio.py in read(file)
166 with values that have been sign-extended.
167 """
--> 168 wav = _wave.open(file)
169 rate = wav.getframerate()
170 nchannels = wav.getnchannels()
/usr/lib/python3.6/wave.py in open(f,mode)
497 mode = 'rb'
498 if mode in ('r','rb'):
--> 499 return Wave_read(f)
500 elif mode in ('w','wb'):
501 return Wave_write(f)
/usr/lib/python3.6/wave.py in __init__(self,f)
161 # else,assume it is an open file object already
162 try:
--> 163 self.initfp(f)
164 except:
165 if self._i_opened_the_file:
/usr/lib/python3.6/wave.py in initfp(self,file)
141 chunkname = chunk.getname()
142 if chunkname == b'fmt ':
--> 143 self._read_fmt_chunk(chunk)
144 self._fmt_chunk_read = 1
145 elif chunkname == b'data':
/usr/lib/python3.6/wave.py in _read_fmt_chunk(self,chunk)
258 self._sampwidth = (sampwidth + 7) // 8
259 else:
--> 260 raise Error('unknown format: %r' % (wFormatTag,))
261 self._framesize = self._nchannels * self._sampwidth
262 self._comptype = 'NONE'
Error: unknown format: 3
解决方法
用例如soxi，您会发现WAVE不是以int16格式编写的，而是float编写的。我怎么知道This code读取wFormatTag标签。在您的情况下，异常返回的代码为3（reference），FLOAT。
一种选择是使用pySoundFile并指定float作为数据格式。
import soundfile as sf
data,samplerate = sf.read('file.wav',dtype='float32')
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