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。+ t7 q& O  A# b% n! R

: k4 t/ ]9 z; a, W/ |8 [Anyone know what software can I use to convert the 2 language RMVB to 1 language AVI?
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: ~( k2 H, Q; N) A* r+ n* `5.39.217.76Thank you very much