Video frame editing software

I've searched the web for a few days and I've still not found exactly 
what I need to do frame-by-frame editing on a video file.

What I want to do is capture all of the frames in a (short) video to BMP 
or JPG files, edit the files individually, and then reconstruct the 
video from the altered files.

Anyone seen any software that can do any of this?

Thanks

- Walt