Command-line video compositing and audio mixing tools
Render is a program for creating composite BMP image sequences. These images are composited as specified in a text configuration file.
Mixer is a program for mixing film soundtracks. It accepts input files in WAV format and outputs a mixed soundtrack in WAV format. Each input channel can contain one or more audio files that are edited and mixed using a cue sheet. The maximum number of channels is a compile-time parameter.
GLIP-Lib is an OpenGL image processing library written in C++. It features all the necessary tools to quickly build texture filters and pipelines and operate them on the GPU.
edje2yuv exports arbitrary Edje animations to YUV4MPEG streams
...Edje is a complex graphical design & layout library based on the Enlightenment Foundation Libraries (EFL) allowing extremely flexible dynamic layouts and animations.
YUV4MPEG streams is a intermediary raw video format widely used in pipes of video conversion tools such as ffmpeg, mencoder, mjpeg-tools and should easily be readable by any video editor.