I Tried to use AviSubDetector and with some avi i could open it, and with another avi an error appeared.

This is the error, in this file Fullmetal_Alchemist_01[v2].DVD(AAC)[KAA][BB60F687].avi

If Someone know what is needed to resolve this problem please tell me.

EDIT: I already found out what is needed, it was this codec: WMV9 VCM, Windows Media Video 9 encoder/decoder.