How to convert the Dual Language RMVB to 1 Language AVI

hahakl

Hi,
  x2 M. g  U4 l( h8 `% m: @公仔箱論壇公仔箱論壇, \6 n4 V6 ~' g- R- a
Anyone know what software can I use to convert the 2 language RMVB to 1 language AVI?
* Q7 E8 y) M! A; L9 l5 ttvb now,tvbnow,bttvb$ n: T5 c0 `4 M
Thank you very much