Doesn't work with Mac or Linux

[franblas]

https://github.com/florianriche/AudioFingerPrinting/blob/master/Fra_part_Spectrogram/audiofile/FFSplit.java#L34

https://github.com/florianriche/AudioFingerPrinting/blob/master/Fra_part_Spectrogram/audiofile/Ffmpeg.java#L71

[franblas]

Correction done but code has to be test
6f93efa