how to convert (RMVP to wmv)

Could anyone tell me how to convert RMVP to wmv....? (or any format could be read at Pockeet PC) I want to watch movie at Pocket PC! TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。! f+ P$ ]% E' E; H$ T
tvb now,tvbnow,bttvb2 E w- d( q3 b" i3 i. P6 M9 j
I am very appreciated if someone could be help this issue