FFmpeg-JNI

This project transcode mp3 files into pcm files by using FFmpeg native method.

Why

Native methods can improve transcoding efficiency and reduce the cost of process switching.
Most of voice evaluation system require pcm source files, and this format is not commonly used. So audio transcoding will be used frequently.

Build

Install FFmpeg
Modify shell variable
Compile to binary using linux.sh or mac.sh
Modify AudioTranscoder.java
Run AudioTranscoder main method