Android ffmpeg codec library for all arm

i want to convert mp4, flv etc... files to mp3 files with ffmpeg C library with different processors codecs (arm5, arm6, arm7, arm v7 vfp v3); who has good expariance using NDK to import C codes to android eclipse i just need liblary not any desing of android apk, and simple usage of the library to my apk import the functions here is some example usages of ffmpeg libs [login to view URL] and here are example codecs and main apk main apk: [login to view URL] codecs [login to view URL] [login to view URL] [login to view URL] [login to view URL]