I use a program call "Pavtube"
Pavtube Video Converter-best software to convert WMV, AVI, TiVo, MKV, AVCHD MTS files.
Its really easy to use and does a great job converting DVD to mp4 format to play on my Atrix 4G and my wife's Samsung tablet. I suggest only converting 2 min. of a movie to see how it plays once converted. This way you will save time. (It takes a few hours to convert a 2hrs movie.)