AviSynth Syntax

This section contains basic information about the AviSynth script language. It presents the fundamental properties and elements of the language and the ways that they can be combined to build an AviSynth script.

• Grammar

The grammar of AviSynth script language. An introduction to AviSynth scripting.

• Script variables

How to declare and use variables in your scripts.

• Operators

Available operators for each type of variable and their relative precedence.

• Clip properties

Functions that return a property of a clip.

• Control structures

Language constructs for controlling the script flow.

• Internal functions

Ready-made non-clip functions to use in your scripts.

• User defined script functions

How to define and use your own custom functions in AviSynth scripts.

• Plugins

How to load plugins (AviSynth, VirtualDub, VFAPI and C-plugins). Plugin autoloading and name-precedence.

• Runtime environment

Scripting on a per-frame basis.