问题
I want to convert a video file of mp4 format to audio file of mp3 format. It is simple through command line but i cannot find how can i convert it through jni. Not sure which library and which function to call. Any help regarding this issue would be much appreciated.
来源：https://stackoverflow.com/questions/15876974/ffmpeg-convert-a-mp4-to-mp3-using-ffmpeg-android-ndk