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<p></p> <p><b>New page</b></p><div>This section is a walkthrough to the internals of the AviSynth script engine. Its aim is to provide a better understanding of how AviSynth transforms script commands to actual video frames and help a user that has already grasped the basics of AviSynth scripting to start writing better and optimised scripts.<br /> <br /> The following subsections present the various parts that when combined together form what can be called the AviSynth's &quot;script execution model&quot;: <br /> <br /> * [[The_script_execution_model/Sequence_of_events|Sequence of events]]<br /> : A detailed description of the sequence of events that occur when you execute (ie load and render to your favorite encoder) an AviSynth script.<br /> <br /> * [[The_script_execution_model/The_filter_graph|The (implicit) filter graph]]<br /> : A glance at the basic internal data structure that holds the representation of a parsed AviSynth script.<br /> <br /> * [[The_script_execution_model/The_fetching_of_frames|The fetching of frames (from bottom to top)]]<br /> : How the AviSynth engine requests frames from filters.<br /> <br /> * [[The_script_execution_model/Scope_and_lifetime_of_variables|Scope and lifetime of variables]]<br /> : The interplay of variables' scope and lifetime with the other features of AviSynth [[AviSynth_Syntax|syntax]].<br /> <br /> * [[The_script_execution_model/Evaluation_of_runtime_scripts|Evaluation of runtime scripts]]<br /> : The details of runtime scripts' evaluation.<br /> <br /> * [[The_script_execution_model/Performance_considerations|Performance considerations]]<br /> : Various performance-related issues and advice on how to optimise your AviSynth scripts and configuration.<br /> <br /> ----<br /> Back to [[Scripting_reference|scripting reference]].<br /> [[Category:AviSynth_Syntax]]<br /> [[Category:Scripting_Reference]]</div>

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