Mplayer/OGM files .......

Hello!
I'm having a bit of an issue with the mysterious OGM video file. There are some ogm. files I'd like to get to my Ipod ... but to get them to my Ipod, I have to be able to play 'em, right? Hah! Well, the file originally opened up as VLC, a supposed "Supporter." of the ogm. files, but I seem to always run into complex problems. "main: no suitable access module for `/Users/ - blah blah blah blah."
It seemed I couldn't find anyone else with the same problem ... and, trying to avoid reffuring to the forums ( Whad'uh ya' know, that's what I'm doing as we speak ... hah! ) I decided to try Mplayer, another "Supporter." Well, I opened up the file, it acted as if it was about to play, and then stopped. I've tried numerous applications, and they all either "Don't support." Something, or repeat the same thing as Mplayer. I've tried numerous converters as well ... but, if you have a suggestion, don't be shy to mention it, as I'm open for all information regardless if I've tried it or not. So, there you have it ... I'm in need of an application - or w/e you can provide me with to be able to simply at the least PLAY .ogm files ....
- THANKS! Shmelt
PS: If some miracle happens to come to pass ... I'd sure appreciate being able to convert ogm. files to Quicktime. Hehe.