Hello ,
This a very straight forward project for me . so what are the parameters you want to set ? please explain about that .
there are several parameters on ffmpeg like bitrate , frame rate , format frame size etc . I already worked with ffmpeg for converting file format only for both desktop (AIR) and web based application (using PHP).
for AIR end we just need very simple native process class .Please communicate with me for more discussion . you can communicate with me through skype . id: projjwalsen