Disclaimer: it seems that the publisher's website is closed and that the software is no longer supported. Thus, even though the version linked to this page is the latest to exist, it may no longer work on your computer, or run with recurring error messages.
As its names suggests it, AMV Convert Tool is a tool that converts video files into AMV format. It accepts the following input formats: AVI, MPEG, DAT, WMV, WMA, ASF, RM, RAM, RMVB, MOV, QT, VOB.
Note: This program requires DirectX 9 and Windows Media Player 9 (or higher).