VapourSynth is a free and open-source video processing framework and application for Windows, macOS, and Linux. It is designed to be a powerful, flexible, and extensible alternative to existing commercial video editing software. It features a wide range of powerful tools for video manipulation, including color correction, image scaling, frame rate conversion, image processing, and much more. VapourSynth also supports a large number of video formats and codecs, making it an ideal choice for professionals and hobbyists alike. Its powerful scripting language allows users to quickly create complex video effects, and it can be extended with plugins and scripts to add even more features and functionality. VapourSynth is a great choice for anyone looking to create professional-quality videos quickly and easily.
Discontinued The program is no longer available. The latest version, 2.0e, released in 2012, can still be downloaded from the official website.