Well, after finally getting the time to try some things, here is what I found out.
When I convert a MKV to AVI, I *Add File*, then select the file, then *open*. The window that opens is titled *H.264(And Others)Special Convertion Process*. I then choose the bitrate and frame rate with the *No Skip Option* window.
This is the file I get the *Codec is NOT supported*, after converting then...
2009-06-07 15:21:43 UTC in convert ogm, mkv to avi with subtitle