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<?xml version="1.0"?>
<api>
  <query>
    <pages>
      <page ns="0" title="API" missing="" />
      <page pageid="343" ns="0" title="Main Page">
        <revisions>
          <rev user="Admin" timestamp="2025-12-06T13:41:55Z" comment="removed reference to avisynth.org" xml:space="preserve">__NOTOC__
&lt;div style=&quot;min-width: 700px; max-width: 1400px; margin: auto;&quot;&gt;
&lt;p style=&quot;clear:both; margin-top:-3px; margin-bottom: 1em; font-variant: small-caps; text-align: center; font-size: 105%;&quot;&gt;
&lt;!-- These should be fundamental categories --&gt; 
[[AviSynth FAQ]] | 
[[Internal filters]] | 
[[External filters]] | 
[[AviSynth Syntax]] | 
[http://sourceforge.net/projects/avisynth2/ Sourceforge] | 
[http://forum.doom9.org/forumdisplay.php?s=&amp;forumid=33 Doom9 Forum]
&lt;/p&gt;
[[File:Avisynth-logo-tray.png|center|280px|AviSynth]] 

{| role=&quot;presentation&quot; style=&quot;border:0; margin:0;&quot; width=&quot;90%&quot; cellspacing=&quot;10&quot;

| colspan=&quot;2&quot;| &lt;!-- Row 0 --&gt;
=== {{ReverseHeading3|Donations}} === __NOEDITSECTION__
Hello everyone! I have been hosting this wiki for a long time. I have been hosting it since around 2010 (from Richard Berg). Although the content is maintained by several people, and I'm very grateful for their time, the hosting costs a lot of money. If you are happy with the site, please make a donation! I would be very grateful and we can keep this site alive:
* You can donate by buying me a coffee: https://buymeacoffee.com/avisynth
* You can donate using PayPal: https://paypal.me/avisynth/

=== {{ReverseHeading3|What is AviSynth?}} === __NOEDITSECTION__
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.
&lt;p&gt;
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 laborious 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.
&lt;/p&gt;
&lt;p&gt;
AviSynth is free open-source software, and licensed under the [http://www.gnu.org/licenses/gpl-2.0.html GNU General Public License GPLv2].
&lt;/p&gt;

|-
| style=&quot;vertical-align: top; width:50%; padding-right:2em; padding-top: 1em;&quot; |  &lt;!-- Row 1 Left --&gt;
=== {{ReverseHeading3|New to AviSynth – Start Here}} === __NOEDITSECTION__
* '''[[first script|Your first script]]''' – A guide for total newbies.
* '''[[Getting started]]''' – An introductory guide.
* '''[[Grammar]]''' – An introduction to the AviSynth scripting language.
* '''[[Filter introduction]]''' – An introductory guide to most common AviSynth [[Filter|filters]].
* '''[[Script examples]]''' – Putting everything together in the real world.
* '''[[AviSynth FAQ]]''' – Answers to many common problems.
* [[More_about_AviSynth|More information]] ''(How does it work? When is it useful? Why no GUI? What applications work well with AviSynth?)''
* [[Guides]] – Guides explaining the basics, tips on specific conversion types and common tasks.
* [[Troubleshooting]] your scripts and configuration.


{|style=&quot;border:none;max-width:26em;margin-left:1em&quot;
|style=&quot;padding:0.5em&quot;|[[File:Overlay-example-lighten.png|104px|link=Overlay|Overlay: Lighten mode]]
|style=&quot;padding:0.5em&quot;|[[File:Layer-example-lite.png|104px|link=Layer|Layer: Lighten mode]]
|style=&quot;padding:0.5em&quot;|[[File:Overlay-example-subtract.png|104px|link=Overlay|Overlay: Subtract mode]]
|-
|style=&quot;padding:0.5em&quot;|[[File:Overlay-example-add.png|104px|link=Overlay|Overlay: Add mode]]
|style=&quot;padding:0.5em&quot;|[[File:Layer-example-mul-rgb.png|104px|link=Layer|Layer: Multiply mode]]
|style=&quot;padding:0.5em&quot;|[[File:Layer-base-Lena.png|104px|link=File:Lenna.png|Lenna]]
|}

|style=&quot;vertical-align: top; width:50%; padding-top: 1em;&quot; |  &lt;!-- Row 1 Right --&gt;
=== {{ReverseHeading3|Download AviSynth}} === __NOEDITSECTION__
*'''Current Builds'''
::{{AvsPlusFullname}}
::New features, backward compatible, native support for Unix-like OSes.
::[[AviSynth%2B|Wiki page]]
::[http://www.avs-plus.net/ Homepage (avs-plus.net)&amp;nbsp;]
::[https://github.com/AviSynth/AviSynthPlus/releases Latest release (GitHub)&amp;nbsp;]
::[https://forum.doom9.org/showthread.php?t=181351 Discussion] at forum.doom9.org

*''Deprecated Official builds''
::[http://sourceforge.net/projects/avisynth2/ v.2.6.0 ST, 32-bit] at [[SourceForge]]

*''Deprecated Unofficial builds''
::[http://forum.doom9.org/showthread.php?t=148782 v.2.6.0 MT, 32-bit, author SET] &lt;br&gt;at forum.doom9.org

*'''Universal Installer'''
::Install&amp;mdash;and quickly switch between&amp;mdash;AviSynth versions:
::* Avisynth 2.5.8, 2.6.0, 2.6.0 MT, 2.6.1 Alpha
::* Avisynth+ 32-bit, 64-bit
::Get it [http://forum.doom9.org/showthread.php?t=172124 here] at forum.doom9.org

*''Deprecated Multithread Version''
::v.2.5.8 MT, 32-bit, author SET, &lt;br&gt;[http://forum.doom9.org/showthread.php?t=148117 discussion at forum.doom9.org]
::v.2.5.8 MT, 64-bit, author SET, &lt;br&gt;[http://forum.doom9.org/showthread.php?t=152800 compiled by JoshyD at forum.doom9.org] 
::[https://github.com/avxsynth/avxsynth AvxSynth] &lt;br&gt;AviSynth 2.5.8 running on Ubuntu 32/64. 

*''Old Bugs and issues''
::[[Known Issues v2.58|Known Issues in v2.58]].
::[[Known Issues|Known Issues in v2.60]].

|-
|style=&quot;vertical-align:top; width:50%; padding-right:2em; padding-top: 1em;&quot; | &lt;!-- Row 2 Left --&gt;
=== {{ReverseHeading3|Script Syntax}} === __NOEDITSECTION__
''The official reference documentation.''
* [[AviSynth Syntax|AviSynth Syntax overview]]
** '''[[Script variables]]''' – How to declare and use them in scripts.
** '''[[Operators]]''' – Available operators and relative precedence.
** '''[[Internal functions]]''' – General purpose functions for math, logic etc.
** '''[[Clip properties]]''' – Properties such as Width, Height, Framerate etc.
** '''[[Control structures]]''' – Language constructs for script flow control.
** '''[[User defined script functions]]''' – How to define and use them in scripts.
** '''[[Plugins]]''' – How to load them (AviSynth, VirtualDub, VFAPI and C-plugins); autoloading and name-precedence explained. Most '''[[External filters]]''' are plugins; the rest are regular scripts.
** '''[[Runtime environment]]''' – Scripting on a per-clip frame basis.
** '''[[Function objects]]''' – {{AvsPluscon}}user defined functions as variables, capture external variables, use them in ScriptClip instead of stringified script fragments.

|style=&quot;vertical-align:top; width:50%; padding-top: 1em;&quot; | &lt;!-- Row 2 Right --&gt;
=== {{ReverseHeading3|Filters and Utilities}} === __NOEDITSECTION__
* '''[[Internal filters]]''' – Included media [[Filter|filters]], organized by category.
* '''[[External filters]]''' – Hundreds of separately downloadable filters, organized by category.
* User pages hosted on this site:
** [http://www.avisynth.nl/users/warpenterprises/ AviSynth Filter Collection – Warpenterprises] 20250316: the names of the AviSynth 2.5 plugins are messed up, put 5F before 25 in the filename (thus for example avsmon25a_5F25_dll_20030125.zip instead of avsmon25a_25_dll_20030125.zip)
** [http://www.avisynth.nl/users/fizick/fizick.html Fizick’s AviSynth plugins]
** [http://www.avisynth.nl/users/vcmohan/ vcmohan’s Plugin Filters]
** [http://www.avisynth.nl/users/stickboy/ stickboy’s AviSynth Stuff]
* [[Shared functions]] – Commonly used script functions.
* [[Utilities]] – A list of GUIs, command-line, batch and other AviSynth related utilities.

|-
|style=&quot;vertical-align:top; width:50%; padding-right:2em; padding-top: 1em;&quot; | &lt;!-- Row 3 Left --&gt;
=== {{ReverseHeading3|Scripting reference}} === __NOEDITSECTION__
''Beyond scripting basics''
* [[Scripting reference|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.

|style=&quot;vertical-align:top; width:40%; padding-top: 1em;&quot; | &lt;!-- Row 3 Right --&gt;
&lt;br&gt;&lt;br&gt;
[[File:ChannelMixer_Before%26After.png|center|240px|link=ChannelMixer|ChannelMixer before and after]]
&lt;div style=&quot;text-align:center;&quot;&gt;
[[File:Maskhs.jpg|100px|link=MaskHS|MaskHS(startHue=105, endHue=138)]] 
[[File:Histogram audiolevels.jpg|120px|link=Histogram#Audiolevels_mode|Histogram(mode=&quot;audiolevels&quot;)]]

[[File:Histogram-tournesol-color2.png|center|240px|link=Histogram#Color2_mode|Histogram(mode=&quot;color2&quot;)]]
&lt;/div&gt;

|-
|style=&quot;vertical-align:top; width:50%; padding-right:2em; padding-top: 1em;&quot; | &lt;!-- Row 4 Left --&gt;
=== {{ReverseHeading3|Advanced topics}} === __NOEDITSECTION__
* [[Advanced Scripting Tips]] – Using recursion, weaving 3 clips, and other programming tips.
* [[Advanced topics]] – Chroma Upsampling Error, color conversions, hybrid video, motion compensation, and other advanced subjects.
* [[Aspect ratios|Aspect ratios explained]] – Introduction to aspect ratios (DAR, PAR, SAR), and how to use that for resizing your clip.
* [[High_bit-depth_Support_with_Avisynth|High bit-depth ('''Deep Color''') support with AviSynth]]
{|
|[[File:Downsampling_bilinear.png|center|180px|link=Resampling#Bilinear_resampler|Resampling: Bilinear upsampling]]
|[[File:Blackman.jpg|center|180px|link=Resampling#Blackman_resampler|Resampling: Blackman filter response]]
|}

|style=&quot;vertical-align:top; width:50%; padding-top: 1em;&quot; | &lt;!-- Row 4 Right --&gt;
=== {{ReverseHeading3|Development}} === __NOEDITSECTION__
* Want to [[get involved]]?
* The [http://sourceforge.net/projects/avisynth2/ official project].
* Learn how to [[Filter_SDK/Compile AviSynth|install compilers and setup environments]].
* Learn how to [[Filter_SDK/Compile AviSynth|compile AviSynth]], [[Filter_SDK/Compiling_instructions|AviSynth plugins]] and [[Filter_SDK/Compiling_instructions|console applications that access AviSynth]].
* Learn how to debug [[Filter_SDK/Debugging_instructions|AviSynth]], [[Filter_SDK/Debugging_instructions|AviSynth plugins]] and [[Filter_SDK/Debugging_instructions|console applications that access AviSynth]].
* [[Filter SDK]] – AviSynth plugin programming tips.
* [[Avisynth Plugin Development in C]] – A tutorial to write a plugin with&amp;nbsp;C.
* [http://forum.doom9.org/forumdisplay.php?s=&amp;forumid=69 AviSynth Developer Forum]
* The ongoing [[changelist]].
* About the development of [[AviSynth v3]] (which will be platform independent).
* References to [[Image Processing Algorithms|image processing algorithms]].

|-
| colspan=&quot;1&quot; style=&quot;vertical-align:top; padding-top: 1em;&quot; | &lt;!-- Row 5 Left --&gt;
=== {{ReverseHeading3|About This Website}} === __NOEDITSECTION__
We need your help to build and improve our site! 
*'''Editing''' is easy! Please see [http://www.mediawiki.org/wiki/Help:Editing_pages Editing pages] and [http://www.mediawiki.org/wiki/Help:Formatting Formatting].
*To port this site to '''another language''', please see the [http://www.mediawiki.org/wiki/Localisation MediaWiki Localisation Guide.]   
*'''Filter and script authors''' – please see [http://forum.doom9.org/showthread.php?t=171356 ''Submit your Documentation''] on doom9.org, and the documentation template [[ExampleFilter]].

|style=&quot;vertical-align:top; font-size:96%; width:50%; padding-top: 1em;&quot; | &lt;!-- Row 5 Right --&gt;
=== {{ReverseHeading3|Documentation Copyright}} === __NOEDITSECTION__
AviSynth documentation is [[Avisynth_wiki:Copyrights|Copyright (c) 2002-{{CURRENTYEAR}}]] AviSynth developers and contributors.

The contents of [http://avisynth.nl avisynth.nl] is released under the ''Creative Commons Attribution-ShareAlike 3.0 License'' [http://creativecommons.org/licenses/by-sa/3.0/ (CC BY-SA 3.0)].

|}
&lt;/div&gt;
[[Category:AviSynth]]</rev>
        </revisions>
      </page>
    </pages>
  </query>
</api>