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ExtendScript Coverage

Implementation progress of ExtendScript API attributes in py_aep.

Each row lists the attributes from the After Effects Scripting Guide not yet implemented. Only attributes are counted - methods are excluded.

  • ✅ = all attributes implemented
  • 🚧 = partially implemented
  • ❌ = class does not exist in py_aep

General

Class Status Missing
Application 🚧 availableGPUAccelTypes, disableRendering, effects, exitAfterLaunchAndEval, exitCode, fonts, isoLanguage, isRenderEngine, isWatchFolder, memoryInUse, onError, preferences, saveProjectOnCrash, settings
System ❌ machineName, osName, osVersion, userName
Project 🚧 dirty, selection, toolType

Note: Most missing Application and System attributes reflect runtime state (memory usage, OS info, render engine mode) that is not stored in .aep files.

Items

Class Status Missing
Item 🚧 dynamicLinkGUID
AVItem 🚧 isMediaReplacementCompatible, proxySource, useProxy
CompItem 🚧 selectedProperties
FolderItem ✅
FootageItem ✅

Layers

Class Status Missing
Layer 🚧 selectedProperties
AVLayer 🚧 audioActive, hasAudio
CameraLayer ✅
LightLayer ✅
TextLayer ✅
ShapeLayer ✅
ThreeDModelLayer ✅

Properties

Class Status Missing
PropertyBase ✅
PropertyGroup ✅
Property 🚧 alternateSource, canSetAlternateSource, canSetExpression, essentialPropertySource, selectedKeys, valueText
MaskPropertyGroup ✅

Render Queue

Class Status Missing
RenderQueue 🚧 canQueueInAME, queueNotify, rendering
RenderQueueItem 🚧 onStatusChanged, templates
OutputModule 🚧 templates

Sources

Class Status Missing
FootageSource ✅
FileSource ✅
SolidSource ✅
PlaceholderSource ✅

Other

Class Status Missing
Shape ✅
KeyframeEase ✅
MarkerValue ✅
ImportOptions ❌ file, forceAlphabetical, importAs, rangeEnd, rangeStart, sequence
Viewer ✅
ViewOptions ✅
View ✅

Text

Class Status Missing
TextDocument ✅
FontObject 🚧 otherFontsWithSameDict
FontsObject ❌ allFonts, favoriteFontFamilyList, fontsDuplicateByPostScriptName, fontServerRevision, fontsWithDefaultDesignAxes, freezeSyncSubstitutedFonts, missingOrSubstitutedFonts, mruFontFamilyList, substitutedFontReplacementMatchPolicy
CharacterRange ❌ characterEnd, characterStart, fillColor, isRangeValid, kerning, strokeColor, strokeOverFill, text
ComposedLineRange ❌ characterEnd, characterStart, isRangeValid
ParagraphRange ❌ characterEnd, characterStart, isRangeValid

Note: FontsObject is a runtime collection, not stored in .aep files.