You may try this total video converter, I always use it to convert video including AVI, WMV, MKV, MP4, MPEG, MOV, VOB, 3GP, FLV, etc. my friends recommend it to me, it's safe and works pretty well. The conversion quality is good, and the conversion speed is really fast. Here is the download link
http://video-converte...rter-wondershare.html
If you are interested in it, here is a step by step guide about how to use it
http://www.freedvdrip...-zune-cell-phone.html
Hope it helps. Contact me if you have any other question.