How to convert the Dual Language RMVB to 1 Language AVI

hahakl

Hi,tvb now,tvbnow,bttvb4 {  \, x/ C6 ~6 a5 ]
公仔箱論壇* `1 Z) a- s1 z# w3 f+ ^
Anyone know what software can I use to convert the 2 language RMVB to 1 language AVI?tvb now,tvbnow,bttvb( W: f/ z1 ~. Z4 N
公仔箱論壇& k$ ^6 ]1 C/ s* \: L
Thank you very much