How to convert the Dual Language RMVB to 1 Language AVI

hahakl

Hi,os.tvboxnow.com8 {7 p2 A( N% ]5 D1 S

* x' m4 B/ |$ E) q% ros.tvboxnow.comAnyone know what software can I use to convert the 2 language RMVB to 1 language AVI?
& w# ?3 ^, f' yos.tvboxnow.comtvb now,tvbnow,bttvb' U! i8 `; V' \" r' b# x
Thank you very much