How to convert the Dual Language RMVB to 1 Language AVI

hahakl

Hi,# @- _8 C( `( [; |+ ?, L* l
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Anyone know what software can I use to convert the 2 language RMVB to 1 language AVI?' K+ U% Z3 H4 |; z
tvb now,tvbnow,bttvb; [, q2 c. x8 a6 `: g
Thank you very much