honestly, it sounds like something i would like to learn about, myself
but - for now, i don't have time to add something to my plate
if i had something like this that i wanted to accomplish....
i guess i would research writing filters and codecs and learn how to do it
then, share my findings with other forum members
my guess is - it isn't as difficult as you might think :P
also - once you get going, you will are likely to find other things you want to do