With some expert help (Thanks Brian!), here is the solution : VLC will convert the file using the following syntax: ..Program Files\..\VLC>vlc -I dummy -vvv "AUDIO.m4a" --sout=#transcode{vcodec=FLV1,acodec=mp3}:standard{access=file,mux=ffmpeg{mux=flv},dst=C:\Users\doc\Documents\FLASH-VERSI...