How to convert the Dual Language RMVB to 1 Language AVI

hahakl

Hi,
8 I9 p( y' T+ Ctvb now,tvbnow,bttvb
5 W9 F+ S  f0 N+ D$ l公仔箱論壇Anyone know what software can I use to convert the 2 language RMVB to 1 language AVI?公仔箱論壇( n7 o8 b0 J* C$ f, P% T
www.tvboxnow.com* p# o9 P; d2 H  `
Thank you very much