You could try an online converter
http://vixy.net/
http://www.zamzar.com/
http://www.mediaconverter.org/
http://media-convert.com/convert/index.php
or a free conversion program
SUPER © v2007
http://www.erightsoft.net/SUPER.html
http://www.erightsoft.com/Superdc.html
SUPER © IS UNIVERSAL as it supports a wide variety of input/source file format to play
or encode (to & from) without any additional third party software.
Supported input source file formats are:
- Video format: 3gp/3g2(Nokia,Siemens,Sony,Ericsson) asf, avi (DivX,H263,H263+,H264,XviD,MPEG4,MSmpeg4 etc..), dat,
fli, flc, flv (used in Flash), mkv, mpg (Mpeg I,Mpeg II), mov(H263,H263+,H264,MPEG4 etc..), mp4(H263,H263+,H264,MPEG4), ogg,
qt, rm, ram, rmvb, str (Play Station), swf (Flash), ts (HDTV), viv, vob, wmv
- Audio format: aac, ac3, amr, mmf, mp2, mp3, mp4, mpc, ogg, ra, wav, wma
- AviSynth Script Files: avs. Let you specify advanced encoding commands using AviSynth scripts!
SUPER © supports the conversion (encoding both ways, to & from ) of ALL the listed formats.