How to convert the Dual Language RMVB to 1 Language AVI

hahakl

Hi,公仔箱論壇/ S2 c0 e0 `! t/ ~9 {. P
公仔箱論壇* [9 q3 j# ?6 Q% w1 }1 }3 O- f" J
Anyone know what software can I use to convert the 2 language RMVB to 1 language AVI?
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Thank you very much