Block on preprocessing

[zhang-yunke]

Hi, I am trying build my own dataset use this code. But when I excuted this code it somehow blocked at wav file feature extraction and consuming all 48 CPU. I waited for a whole night and nothing happened, any idea about it? I am using Ubuntu 16.04 and tried python 3.7 and 2.7. My wav file is in 48000 sr and 16 bit.