RFX-GIMP provides an interface that permits the LiVES video editor to take advantage of GIMP's scripting capabilities.
In other words, you can write LiVES add-ons using GIMP Script-fu.
When you run a RFX-GIMP script, LiVES will connect to a GIMP process running in the background and transmit the script's commands over the network to the Script-fu server.
This project is still in its early stages. For now, you can visit the getting started page for more info. For those interested, I have posted about some of my experiences writing RFX-GIMP on my weblog.
EFFECTS
Edit in GAP - Allows editing of the selected range of frames in GAP (GIMP Animation Package).
Cartoonize - Gives frames a cartoon-like appearance.
Cross Process - Simulates cross-processing color negative film as though it were slide film.
Diffuse - Simulates using a diffusion filter on the camera.
Invert - Inverts the colors.
Motion Blur - Perform motion blurring.
Ripple - Apply horizontal or vertical ripples to frames.
Waves - Apply concentric wave effect such as produced by tossing a pebble in a pond.
Technicolor 3-strip - Simulates Technicolor 3-strip film process.
Unsharp Mask - Sharpens image in high-contrast regions.
Video Pattern - Adds scanline type artifacts to frames.
TRANSITIONS
Clock Wipe - Transition with wiping motion a la hands of a clock.
Jigsaw - Transition by randomly filling in jigsaw puzzle shaped pieces.
Color Match - Matches the colors of the selected range of frames to match that of the first frame in the clipboard. (This is not really a transition, but until LiVES RFX implements a way to specify an image as a parameter to an effect, it will have to do.)