File Converter ( .flv to .mov)

Does anyone know of a god file converter program that can make .flv movies into a file-type recognizable by QuickTime?

I use a program called Super from erightsoft.com

i use riva flv coverter, its free and it encodes to mpg, which can be changed easily to most formats.

I use http://www.winavi.com/ and http://www.erightsoft.com no format that these two combined can't convert.