Hi, I'm curious to find out exacly which audio/video codecs or codec derivitive ratDVD is using for encoding and decoding.
In your FAQ you only state that you do not use H.263 (MPEG-4 ASP) or H.264 (MPEG-4 AVC)?, I just find that a bit odd,
(I don't want to wildly speculate but I suspect you using a H.264 derivitive for video and down-sampled AC3 for audio?).

Did you really code both your audio and video codec from scratch?, or did you borrow code and specs/docs from others?
Would you consider sharing those codecs with the OSD community so non-DirectShow based players can use them too?
(ex. if you submit the code to decode ratDVD codecs to the FFmpeg project then MPlayer, XINE, VLC, etc. can use them).

PS! Hope you will someday open source your whole project, in the mean-time please consider that when you code ratDVD,
I mean no offense, just know that some GPL'ed project-members (and the MPAA) take code/spec 'stealing' very seriously).

hmm, reading my post I realize it might sound a bit offensive but know that isn't the case, I really wish you all the best.

Best regards and respect / Gamester17