如何解决保存.wav文件时出现随机系统错误
我有一个脚本,可以加载,重新采样,重命名并将音频数据保存到新的(或相同的)位置。
在过去的两天里,我一直试图在Google Cloud上运行此脚本。对于8个CPU,此操作大约需要8个小时。我今天有6个小时,它变成梨形。
不幸的是,我在此过程中的某个随机时刻一直遇到系统错误:
RemoteTraceback:
"""
Traceback (most recent call last):
File "/opt/conda/lib/python3.7/multiprocessing/pool.py",line 121,in worker
result = (True,func(*args,**kwds))
File "/opt/conda/lib/python3.7/multiprocessing/pool.py",line 47,in starmapstar
return list(itertools.starmap(args[0],args[1]))
File "/home/jupyter/jn-kaggle/birdsong/who-said-what/wsw/preprocessing.py",line 27,in write_audio
with sf.SoundFile(path,'w',sr,channels=1,format='WAV') as f:
File "/opt/conda/lib/python3.7/site-packages/soundfile.py",line 629,in __init__
self._file = self._open(file,mode_int,closefd)
File "/opt/conda/lib/python3.7/site-packages/soundfile.py",line 1184,in _open
"Error opening {0!r}: ".format(self.name))
File "/opt/conda/lib/python3.7/site-packages/soundfile.py",line 1357,in _error_check
raise RuntimeError(prefix + _ffi.string(err_str).decode('utf-8','replace'))
RuntimeError: Error opening '/home/jupyter/jn-kaggle/birdsong/data/resampled/solsan/XC448920.wav': System error.
"""
现在,我已经读到该系统错误通常是因为文件路径不存在。但是,由于我是在尝试打开文件之前创建文件的,所以我认为这是不可能的:
os.makedirs(os.path.dirname(path),exist_ok=True)
with sf.SoundFile(path,format=format) as f:
f.write(audio)
因此,由于路径已定义和创建,因此我认为将路径弄错不是问题。
这是完整的脚本:
def resample_all(old_path,new_path,sr):
# Get every folder in a directory
folders = [d for d in os.scandir(old_path) if os.path.isdir(d.path)]
n_folders = len(folders)
# for each folder,get each file
for i,folder in enumerate(folders):
dirname = folder.name
# get every file from
files = [f.name for f in os.scandir(folder) if os.path.isfile(f.path)]
# rename name file with .wav extension
renamed = map(rename,files)
# get original path of every file
r_paths = [f.path for f in os.scandir(folder)]
# get path to write to for every file.
w_paths = [os.path.join(new_path,dirname,f) for f in renamed]
with Pool(os.cpu_count()) as p:
# resample audio
data = p.starmap(read_audio,zip(r_paths,[sr] * len(r_paths)))
# save audio
aud,srs = zip(*data)
p.starmap(write_audio,zip(w_paths,aud,srs))
正在传递给multiprocessing.Pool
的三个帮助函数是:
def read_audio(file_path,sr=22050):
with warnings.catch_warnings():
warnings.simplefilter("ignore",UserWarning)
return librosa.load(file_path,sr=sr)
def write_audio(path,audio,format='WAV'):
os.makedirs(os.path.dirname(path),format=format) as f:
f.write(audio)
def rename(file_path,ext='.wav'):
return os.path.splitext(file_path)[0] + ext
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