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VapourSynth is an application for video manipulation. Or a plugin. Or a library. Its 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. Requires Python! Full description.

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Version:r28 History


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  Latest version:
r28 (October 07, 2015)

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Download VapourSynth r28 (direct link) (5.1MB)

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Video Editors (Advanced/NLE)

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Version history / Release notes / Changelog:
R28 eControversy
Posted on October 7, 2015

Whats controversial you ask? Checking if plugins actually use the API as documented. Walls of derping on the subject were quickly created. But enough about that, now its time to list the new features and interesting changes.

The first thing youll notice is that Python 3.5 is now required instead of 3.4. This is good because its not bad. And I dont have to keep an ancient compiler around anymore when developing things. Windows development only needs VS2015 now.

Other interesting changes are:

Expr is much faster because it has runtime code generation there should be much less reason to use Lut(2) now
Expr can have 26 input clips many instances of Lut2 and other small logic filters can now be folded into one much faster expression
Float support in PlaneAverage, imwri, Lut and Lut2 (only output in the lut filters)
vs.get_core() can be used everywhere in scripts previously it would throw an error if used in script function callbacks
Much smaller installer

View full changelog

All features / Full description:
The main features compared to Avisynth are:

Multithreaded Frame level multithreading
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 dont have have to learn a special language
Support for video with format changes Some video just cant stick to one format or frame size VapourSynth can handle any kind of change

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