I have a couple of MKV files that are just a bit too big to fit on my dvd. I'm planning on reconverting a couple of them into mkv again, but i can't find any good guides on the matroska main webpage, and can't find any programs to do it either. i don't know how to do command line, and i don't know how to reconvert them. i can't rar them or zip them or watching it on another computer would be a pain, and it still won't fit. i heard of demuxing and converting the video and audio files seperatly and merging it together. any way of doing this free? also, i don't know how to find out what audio and video that's inside of my videos. can anybody help?