This was posted by me way back in September AlltoAvi http://alltoavi.sourceforge.net/ works good and it's free....I've only converted one mkv file but it went smoothly. Converted it to DivX then used ConvertXtoDVD(which kept giving me errors trying to use it to convert the mkv file)to convert and burn to DVD. I tried the mpeg option in AlltoAvi but that didn't work so I went with the DivX option..........AllToAvi lets you choose one audio and one subtitle track I believe.