i try to open an audio with m4a format and i got NoBackendError

[Jason]

hi ! thanks for this lib!
i have a audio with m4a format and i want get the content through audioread , but when i doing this i get an error , my code like this:

import audioread
file = './tingting.m4a'
with audioread.audio_open(file) as f:
    print(f.duration, f.channels)
    for buf in f:
        print(f)

the error like this:

NoBackendError                            Traceback (most recent call last)
<ipython-input-8-da9eca8a7457> in <module>()
      1 import audioread
      2 file = './tingting.m4a'
----> 3 with audioread.audio_open(file) as f:
      4     print(f.duration, f.channels)
      5     for buf in f:

D:\Users\keltsing\Anaconda3\lib\site-packages\audioread\__init__.py in audio_open(path)
    114 
    115     # All backends failed!
--> 116     raise NoBackendError()

NoBackendError: 

do i choice a wrong audio format? if that's true, which format audioread support?

[Adrian Sampson]

Hello! It supports all the formats that all the backends support. So depending on your OS, you may consider installing ffmpeg or GStreamer with its full suite of plugins.

[Deleted user]

thanks