How to convert the Dual Language RMVB to 1 Language AVI

hahakl

Hi,公仔箱論壇2 W% r$ W6 \& _/ [" c7 G) F: u) g
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Anyone know what software can I use to convert the 2 language RMVB to 1 language AVI?5.39.217.768 T+ J* _  q3 }
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Thank you very much