I just realized that I haven't submitted info about VS at HN when I discovered it back then, so I'm fixing it right now. :)
About page gives good idea what it is and how it differs from Avisynth.
VapourSynth is an application for video manipulation. Or a plugin. Or a
library. It's hard to tell because it has a core library written in C++
and a Python module to allow video scripts to be created. It came to be
when I started thinking about alternative designs for Avisynth and most
of it was written over a 3 month period. The software has been heavily
inspired by Avisynth and aims to be a 21st century rewrite, taking
advantage of the advancements computers have made since the late 90s.
The main features compared to Avisynth are:
* Multithreaded - Frame level multithreading that scales well
* Generalized Colorspaces - New Colorspaces can be specified at runtime
* Per Frame Properties - Additional metadata can be attached to frames
* Python Based - The scripting part is implemented as a Python module
so you don't have to learn a special language
* Support for video with format changes - Some video just can't stick
to one format or frame size. VapourSynth can handle any kind of
change
* Compatible with a large number of already existing Avisynth plugins
Mind that it is still WIP. It's not complete Avisynth drop-in replacement, but it's close as possible, yet diverges whenever things can/should be done better. It's mostly ABI-compatible for Windows Avisynth plugins.
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[ 4.1 ms ] story [ 21.5 ms ] threadAbout page gives good idea what it is and how it differs from Avisynth.
(taken from https://github.com/vapoursynth/vapoursynth/blob/master/doc/a...)Mind that it is still WIP. It's not complete Avisynth drop-in replacement, but it's close as possible, yet diverges whenever things can/should be done better. It's mostly ABI-compatible for Windows Avisynth plugins.