vlc in android studio with ffmpeg in linux

[bgu]

hey need some help..
i am using vlc in android studio with ffmpeg in linux i need to modify some code in ffmpeg c file.
when i compile ffmpeg and run vlc app in android it uses the original version of ffmpeg and not the modified .

any suggestion why this occured maybe another way to compile or how to find the source of ffmpeg

*if i delete the file of ffmpeg and compile it restrore the ffmpeg file from somewhere dont know how.

tnx