AC3 5.1 and Dolby codecs

AC3 encoding via ffmpeg 

Hi, though it is mentionned that usually the encoding is not done in the mixing software, I have a case where I want a multilingual dvd available as fast as possible after the recording. I would love to use reapers direct encoding functionnality together with my firepod to have the aac files availables right when I stop my recording. Integrating ffmpeg dll also for audio export would provide the ac3 codec as well as many others. Does anybody know if it is on a roadmap ? Thanks