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=== What is AviSynth? === __NOEDITSECTION__
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*It’s a powerful tool for '''video post-production.'''
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*It’s a '''[[frameserver]]''', providing instant transfer to other video applications without the need for temporary files.
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*It’s a '''script system''' for '''[[NLE|non-linear editing]]''' and '''[[Filter|video filters]]''' and effects.
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AviSynth is a powerful tool for video post-production. It provides ways of editing and processing videos. AviSynth works as a [[frameserver]], providing instant editing without the need for temporary files.
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AviSynth itself does not provide a graphical user interface (GUI). While scripting may at first seem tedious and unintuitive, it is a very good way to manage projects in a precise, consistent, and reproducible manner. Because text-based scripts are '''human readable''', projects are inherently '''self-documenting'''. You have complete control of everything.
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AviSynth itself does not provide a graphical user interface (GUI), but instead relies on a script system that allows advanced [[NLE|non-linear editing]]. While this may at first seem tedious and unintuitive, it is remarkably powerful and is a very good way to manage projects in a precise, consistent, and reproducible manner. Because text-based scripts are human readable, projects are inherently self-documenting. The scripting language is simple yet powerful, and complex filters can be created from basic operations to develop a sophisticated palette of useful and unique effects.
 
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The scripting language is '''simple yet powerful''' – basic [[Filter|filters]] can be combined to create useful and unique effects. It is easy to [[Script_examples|create a quick script]] to solve some video problem. It can do '''much more''' than that, though: to get an idea, take a quick glance at all the [[External_filters|third-party plugins]] available, or [http://forum.doom9.org/forumdisplay.php?s=&forumid=33 browse the doom9 forum] to see what AviSynth users and developers are getting up to lately!
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AviSynth is free open-source software, under the [http://www.gnu.org/licenses/gpl-2.0.html GNU General Public License GPLv2].
 
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AviSynth takes its name from [[wikipedia:Audio_Video_Interleave|''AVI'']], a digital media format, and ''Synthesis'', because it creates [http://en.wikipedia.org/wiki/Synthesizer (synthesizes)] a ''virtual'' (in memory, not on disk) media file – “generating video and audio data according to the script and feeding it to the application as needed.” (in the [[Original_AviSynth_announcement|words of its inventor]], Ben Rudiak-Gould). It ''could'' be used as a [http://en.wikipedia.org/wiki/Video_synthesizer Video Synthesizer], but this is not its usual function.
 
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AviSynth is '''free open-source software''', under the [http://www.gnu.org/licenses/gpl-2.0.html GNU General Public License GPLv2]; see [[Avisynth_wiki:Copyrights|Copyrights]].
 
 
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Revision as of 00:59, 15 November 2015

AviSynth FAQ | Internal filters | External filters | AviSynth Syntax | Sourceforge | Doom9 Forum

AviSynth

What is AviSynth?

AviSynth is a powerful tool for video post-production. It provides ways of editing and processing videos. AviSynth works as a frameserver, providing instant editing without the need for temporary files. AviSynth itself does not provide a graphical user interface (GUI), but instead relies on a script system that allows advanced non-linear editing. While this may at first seem tedious and unintuitive, it is remarkably powerful and is a very good way to manage projects in a precise, consistent, and reproducible manner. Because text-based scripts are human readable, projects are inherently self-documenting. The scripting language is simple yet powerful, and complex filters can be created from basic operations to develop a sophisticated palette of useful and unique effects.

AviSynth is free open-source software, under the GNU General Public License GPLv2.

New to AviSynth – Start Here

Download AviSynth

  • Official builds
v.2.6.0 ST, 32-bit at SourceForge
  • Unofficial builds
v.2.6.0 MT, 32-bit, author SET at forum.doom9.org
  • Forks
AviSynth+, 32-bit and 64-bit, author ultim at forum.doom9.org. Download: avs-plus.net | Wiki page: AviSynth+
AvxSynth: a Linux port of AviSynth AvxSynth is a native port of AviSynth 2.5.8 running on Ubuntu 32/64.
  • Deprecated
v.2.5.8 MT, 32-bit, author SET, discussion at forum.doom9.org
v.2.5.8 MT, 64-bit, author SET, compiled by JoshyD at forum.doom9.org
  • Bugs and issues
Known Issues in v2.58.
Known Issues in v2.60.

Script Syntax

The official reference documentation.

Filters and Utilities

Scripting reference

Beyond scripting basics

  • Scripting reference overview
    • The full AviSynth grammar – The AviSynth grammar revisited and explained in detail.
    • The script execution model – The steps behind the scenes from the script to the final video clip output. The filter graph. Scope and lifetime of variables. Evaluation of runtime scripts.
    • User functions – How to effectively write and invoke user defined script functions; common pitfalls to avoid; ways to organise your function collection and create libraries of functions, and many more.
    • Block statements – Techniques and coding idioms for creating blocks of AviSynth script statements.
    • Arrays – Using arrays (and array operators) for manipulating collections of data in a single step.
    • Scripting at runtime – How to unravel the power of runtime filters and create complex runtime scripts that can perform interesting (and memory/speed efficient) editing/processing operations and effects.
ChannelMixer before and after

MaskHS(startHue=105, endHue=138) Histogram(mode="audiolevels")

Histogram(mode="color2")

Advanced topics

Resampling: Bilinear upsampling
Resampling: Blackman filter response

Development

About This Website

We need your help to build and improve our site!

Documentation Copyright

AviSynth documentation is Copyright (c) 2002-2019 AviSynth developers and contributors.

The contents of avisynth.org and avisynth.nl are released under the Creative Commons Attribution-ShareAlike 3.0 License (CC BY-SA 3.0).

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