"Under 100MB" is a very vague term... because it says nothing about its source. Where did you get these MKV/OGM files and what are they in terms of resolution, content, and length? What codec do they use? Why do you need them converted to Realmedia?
ok....i still don't like them, is there away to make them smaller? 300mb per lecture is a bit to much for me But i do have to say the MKV has very very good video and sound quality but i just really don't have the space.... maybe theres an app i can buy? I want to make this easy too or atleast has steps thats why im asking for a tut i don't care if i lose some quality......the cam is on a guy on a stand but putting subs in isn't a bad idea, sometimes you can't understand them, is there an app so you can make subs and put it in the video?
Pretty much any of the applications in can recompress them. You'll lose some quality and it'll take a while, but you do what you have to do. Adding subs is a very manual, labor-intensive process, and the best resources for that are anime fansubbing how-tos, the guides for using Aegissub.
To compress a 300MB file to 100MB, the quality must will be sacrificed (perhaps, picture will be much smaller, bitrate will be much lower...). If you do need to convert to rm/rmvb format, I recommend you .