No Backends

When running the example I receive this error

In[2]:

import matplotlib, librosa
In [3]:

import IPython.display
import numpy as np
In [4]:

import matplotlib.pyplot as plt
%matplotlib inline
In [12]:

y, sr = librosa.load(librosa.util.example_audio_file())
---------------------------------------------------------------------------
NoBackendError                            Traceback (most recent call last)
<ipython-input-12-1c3f0c525dc9> in <module>()
----> 1 y, sr = librosa.load(librosa.util.example_audio_file())

/Library/Python/2.7/site-packages/librosa/core/audio.pyc in load(path, sr, mono, offset, duration, dtype)
    106 
    107     y = []
--> 108     with audioread.audio_open(os.path.realpath(path)) as input_file:
    109         sr_native = input_file.samplerate
    110 

/Library/Python/2.7/site-packages/audioread/__init__.pyc in audio_open(path)
     94 
     95     # All backends failed!
---> 96     raise NoBackendError()

NoBackendError: 

Any Ideas as to what could be causing this? I am running the example in Ipython notebook and OSX Yosemite 10.10

[macramole]

The solution for ubuntu based systems is: sudo apt-get install libav-tools

[bmcfee]

Were you able to resolve this?

I suspect the problem is a missing ogg vorbis codec for audioread. Installing ffmpeg or gstreamer (with plugins) should fix this for you.

.wav files should work out of the box, but we don’t ship the demo track in wav.