How do you convert FLV to FLV en masse?

I have a whole mess of FLV files that I need to downconvert. Like over a hundred. They will all have to have the same info, ultimately, so is there a program that can do a mass conversion for me? Where I input the info and it outputs all the files as the same?
Recommend you a free editing software: FLV Editor Lite Beta. It is professinal editing flv software. It can merge, trim, split,cut FLV, replace music in timeline and output FLV files. Get it here: http://www.exp-flv.com/