How do I convert an FLV video file to an MPG or AVI file?

I saved a video from Photobucket to my computer and I want to import the video on Windows Movie Maker..I guess WWM doesn't upload flv files so flv to mp3 you have to convert it to a mpg or avi file. Does flv to mp4 anyone know how I can do that? Try this flv converter, It can convert almost all video formats, e.g.DivX, XviD, AVI, WMV, MPG, MPEG, MP4, M4V, FLV, 3GP, ASF, RM, RMVB, download flv MOV, MOD, ASX, MKV, OGM, SVCD, VCD, VOB to FLASH Video (SWF, FLV) formats.