OpenVIP is a flexible video-processing tool for Unix and Windows.
Support for a wide range of multimedia files including AVI, MPEG, MP3. We use codecs from the ffmpeg project and it is also possible to read AVI files using native codecs under Windows.
A lot of nice plugins including colour transformations, geometric distortions, basic sound processing and transitions between two movies.
A simple interface for developing your own plugins in C/C++. It is described in the developer's documentation.

ядро позволяющее выполнять обработку видео по сценарию (задается в XML) и GUI интерфейс на Python