Librosa raised NoBackendError() error in windows environment during media file reading.
Librosa does not handle audio coding directly. It relies on the audioread package to interface between different decoding libraries (pymad, gstreamer, ffmpeg, etc).
The
exception that you're getting is coming from audioread because it can't
find a back-end to handle mp3 encoding. You should verify that one of
the mp3-supporting back-ends is properly installed.
for more detail follow https://groups.google.com/forum/#!topic/librosa/Z1-HXBsHLi0FFmpeg is the leading multimedia framework to decode, encode, transcode, mux, demux, stream, filter and play. FFmpeg supports a wide variety of video formats and can utilize hardware acceleration to minimize conversion time.
Download the FFmpeg program. When you visit the download page, you will see a variety of options. Download the latest Static version in either 32-bit or 64-bit, depending on your operating system. follow instruction given @ http://www.wikihow.com/Install-FFmpeg-on-Windows
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