librosa can't open .wav created by librosa?

Question

i'm trying to use librosa to generate some data by cutting 1s pieces from some .wav file with a duration of 60s.

This part works, i create all my files and i can also listen to them via any player, but if i try to open them with librosa.load i receive this error:

>>> librosa.load('.\\train\\audio\\silence\\0doing_the_dishes.wav', sr=None)
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "C:\Users\gionata\AppData\Local\Programs\Python\Python36\lib\site\packages\librosa\core\audio.py", line 107, in load
with audioread.audio_open(os.path.realpath(path)) as input_file: File "C:\Users\gionata\AppData\Local\Programs\Python\Python36\lib\site-packages\audioread\__init__.py", line 116, in audio_open 
raise NoBackendError()
audioread.NoBackendError

Do you have any suggestion? I create the file.wav with this function:

def create_silence():
    path=DB+"_background_noise_/"
    sounds = [x[len(DB):] for x in glob.glob(path+ '*.wav')]
    for elem in enumerate(sounds):
       sound=elem.split('\\')[1]
       print(sound)
       for j,i in enumerate(np.arange(0.0, 59.0, 0.3)):
           y, sr=librosa.load(DB+elem, sr=None, offset=i, duration=1.0)
           librosa.output.write_wav(DB+'silence/'+str(j)+sound, y, sr=sr, norm=False)

The problem only presents itself with file created by librosa, librosa.load has worked with other files with no problems at all.

Answer 1

It's about ffmpeg, if you use windows, you can solve this according to here and if you use linux, if can try:

sudo apt-get install libav-tools