You may try this total video converter, I always use it to convert video including AVI, WMV, 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. If you are interested in it, here is a step by step guide about how to use it
http://www.freedvdripper.net/guides/convert-video-to-ipod-psp-zune-cell-phone.html
