How to convert the Dual Language RMVB to 1 Language AVI

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Hi,TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。$ |) z: h5 B* H8 l( J, q  t

! O! ]/ O/ ]$ {' E6 s0 D6 T0 ytvb now,tvbnow,bttvbAnyone know what software can I use to convert the 2 language RMVB to 1 language AVI?
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+ e  s" T% O9 p& B* c' d公仔箱論壇Thank you very much