QuickTime .mov to .avi

Hi All, please, how can I convert a QuickTime movie .mov from my Minolta Dimage Z1 to DivX or other format? I use compiled mplayer for viewing, I havn't found any other player. Xine ignores codec (???) and xmovie from http://heroinewarrior.com/index.php3 shows a blue screen only (no video). Thanks. Marek