AviSynth

Avisynth is a scripting-based tool for video processing that lets users define a sequence of filters and operations to apply to video frames. It acts as a frameserver, producing video streams that can be consumed by encoders and players without creating intermediate files. The project is hosted at avisynth.nl, serving as the official site for documentation and resources related to Avisynth.

AI named AviSynth from January 2026 to September 2026.