How to convert the Dual Language RMVB to 1 Language AVI

hahakl

Hi,公仔箱論壇7 H6 q4 F2 j6 q; v8 j2 Q
tvb now,tvbnow,bttvb$ F* W3 M# o" J
Anyone know what software can I use to convert the 2 language RMVB to 1 language AVI?
5 s+ x8 r8 w6 _' y. X5 q0 `/ vtvb now,tvbnow,bttvb公仔箱論壇* W& k- B6 M$ @9 Y
Thank you very much