Casio ExilimEX-S770 Decode Video File Format

I have a Casio Exilim EX-S700, I would like to edit the videos I capure. I can crop the video at the beginning middle and end with the camera or some software that came with the camera. But I would really like to cut add visual affects and music with Sony Vegas 5.0 But the AVI files are coded in some way that will only load the audio portion or the file into Sony Vegas. Please help is there any way to convert the file into a usable format or decode the file???