根据结构类型的属性分类
在 After Effects 的脚本开发中，图层的属性可被区分为三种类型：PROPERTY、INDEXED_GROUP 和 NAMED_GROUP 。通过使用app.project.item().layer().propertySpec.propertyType 可以对属性的类型进行判断。在 AEGP 插件的开发中这些类型对应为 AEGP_StreamGroupingType_LEAF 、AEGP_StreamGroupingType_INDEXED_GROUP 和 AEGP_StreamGroupingType_NAMED_GROUP，通过调用 AEGP_DynamicStreamSuite 的AEGP_GetStreamGroupingType 方法进行获取。
PROPERTY（LEAF）类型的属性为属性组中最底层的属性，即具有对应的值可供用户操作调整的属性；INDEXED_GROUP 类型的属性组中子级的名称可编辑，换言之 INDEXED_GROUP 类型的属性组中的子级是不固定的，可进行增删，如效果和蒙版都是这种类型；NAMED_GROUP 类型的属性组具有固定的子级属性，且子级属性的名称是不可更改的。
在脚本中直接输出 propertyType 时会输出一个数字，这是 ExtendScript 中定义的 PropertyType 枚举。
例如，某个图层的“变换”属性组的 propertyType 输出值如图所示，表明“变换”是一个 NAMED_GROUP 属性组。
某个文字图层的“文本”属性组下的“动画制作工具”属性组是一个 INDEXED_GROUP 属性组。
属性的可见性
在 AEGP 插件的开发中可以通过调用 AEGP_DynamicStreamSuite 的 AEGP_GetDynamicStreamFlags 方法获取属性的标志，其中具有几个值得注意的内容。AEGP_DynStreamFlag_ELIDED 标志着一个属性组始终不会将自身显示在时间轴面板中，但它的子级属性会直接显示在该属性组的父级属性组中。一个常用的例子是文本图层的“动画制作工具”：当给文本图层添加一个动画制作工具后，“文本”属性组中“动画制作工具 1”会与“源文本”、“路径选项”和“更多选项”并列显示，但实际上“动画制作工具 1”是存在于“动画制作工具”属性组中的，但由于“动画制作工具”具有 ELIDED 标志，导致“动画制作工具”不会显示在时间轴中。编写脚本时访问此类属性组中的属性需要注意。另外，在脚本中使用 app.project.item().layer().porpertySpec.elided 也能获取到某属性组是否具有 ELIDED 标志。
特定类型图层所具有的属性组是固定的，未显示在时间轴中的属性不代表它不存在，通常未被修改的属性及其属性组会被隐藏。在脚本中可以通过app.project.item().layer().porpertySpec.isModified判断某属性在创建后是否被修改。
图层属性的结构
在脚本中图层可以当作属性组进行处理，如下图所示：
在 AEGP 插件开发中通常使用 AEGP_DynamicStreamSuite 的 AEGP_GetNewStreamRefForLayer方法检索与图层对应的 AEGP_StreamRefH ，用于启动图层属性流的递归。亦是将图层作为属性组进行处理。
因图层是 NAMED_GROUP 类型的属性组，故其子级属性组是固定的。本文整理了AVLayer、TextLayer、ShapeLayer、CameraLayer 和 LightLayer 五类图层的属性组结构，其中包括属性的中文名称与其 MatchName 的对照。因树形图尺寸过大，以下提供 FreeMind 文件的下载链接：https://wwe.lanzoui.com/ilSn0v23p3e
若您对遍历某属性组中的属性有兴趣，也可以参考以下脚本代码：
var str = '';
var selProp = app.project.activeItem.selectedLayers[0].property("Transform");//将该变量修改为您需要遍历的属性组
var numProps = selProp.numProperties;
for(var i = 0; i < numProps; i ++){
str += selProp.property(i + 1).name + ' - ' + selProp.property(i + 1).matchName + '\n';//输出名称和 MatchName
}
alert(str);脚本中访问属性的简介写法
在 ExtendScript 脚本中访问属性具有简洁写法，例如 .property("Transform") 也可以使用 . transform。以下提供部分对照以供查找和参考：
| 属性 | 简洁写法 |
|---|---|
| ADBE Transform Group: | 'transform', |
| ADBE Anchor Point: | .pointOfInterest' 或 '.anchorPoint', |
| ADBE Position: | '.position', |
| ADBE Scale: | '.scale', |
| ADBE Orientation: | '.orientation', |
| ADBE Rotate X: | '.xRotation', |
| ADBE Rotate Y: | '.yRotation', |
| ADBE Rotate Z: | .zRotation' 或 '.rotation', |
| ADBE Opacity: | '.opacity', |
| ADBE Material Options Group: | 'materialOption', |
| ADBE Casts Shadows: | '.castsShadows', |
| ADBE Light Transmission: | '.lightTransmission', |
| ADBE Accepts Shadows: | '.acceptsShadows', |
| ADBE Accepts Lights: | '.acceptsLights', |
| ADBE Ambient Coefficient: | '.ambient', |
| ADBE Diffuse Coefficient: | '.diffuse', |
| ADBE Specular Coefficient: | '.specular', |
| ADBE Shininess Coefficient: | '.shininess', |
| ADBE Metal Coefficient: | '.metal', |
| ADBE Light Options Group: | 'lightOption', |
| ADBE Light Intensity: | '.intensity', |
| ADBE Light Color: | '.color', |
| ADBE Light Cone Angle: | '.coneAngle', |
| ADBE Light Cone Feather 2: | '.coneFeather', |
| ADBE Light Shadow Darkness: | '.shadowDarkness', |
| ADBE Light Shadow Diffusion: | '.shadowDiffusion', |
| ADBE Camera Options Group: | 'cameraOption', |
| ADBE Camera Zoom: | '.zoom', |
| ADBE Camera Depth of Field: | '.depthOfField', |
| ADBE Camera Focus Distance: | '.focusDistance', |
| ADBE Camera Aperture: | '.aperture', |
| ADBE Camera Blur Level: | '.blurLevel', |
| ADBE Text Properties: | 'text', |
| ADBE Text Document: | '.sourceText', |
| ADBE Text Path Options: | '.pathOption', |
| ADBE Text Path: | '.path', |
| ADBE Text Reverse Path: | '.reversePath', |
| ADBE Text Perpendicular To Path: | '.perpendicularToPath', |
| ADBE Text Force Align Path: | '.forceAlignment', |
| ADBE Text First Margin: | '.firstMargin', |
| ADBE Text Last Margin: | '.lastMargin', |
| ADBE Text More Options: | '.moreOption', |
| ADBE Text Anchor Point Option: | '.anchorPointGrouping', |
| ADBE Text Anchor Point Align: | '.groupingAlignment', |
| ADBE Text Render Order: | '.fillANdStroke', |
| ADBE Text Character Blend Mode: | '.interCharacterBlending', |
| ADBE Text Animators: | '.animator', |
| ADBE Text Selectors: | '.selector', |
| ADBE Text Percent Start: | '.start', |
| ADBE Text Percent End: | '.end', |
| ADBE Text Percent Offset: | '.offset', |
| ADBE Text Range Advanced: | '.advanced', |
| ADBE Text Range Units: | '.units', |
| ADBE Text Range Type2: | '.basedOn', |
| ADBE Text Selector Mode: | '.mode', |
| ADBE Text Range Shape: | '.shape', |
| ADBE Text Selector Smoothness: | '.smoothness', |
| ADBE Text Levels Max Ease: | '.easeHigh', |
| ADBE Text Levels Min Ease: | '.easeLow', |
| ADBE Text Randomize Order: | '.randomizeOrder', |
| ADBE Text Random Seed: | '.randomSeed', |
| ADBE Text Selector Mode: | '.mode', |
| ADBE Text Wiggly Max Amount: | '.maxAmount', |
| ADBE Text Wiggly Min Amount: | '.minAmount', |
| ADBE Text Range Type2: | '.basedOn', |
| ADBE Text Temporal Freq: | '.wigglesSecond', |
| ADBE Text Character Correlation: | '.correlation', |
| ADBE Text Temporal Phase: | '.temporalPhase', |
| ADBE Text Spatial Phase: | '.spatialPhase', |
| ADBE Text Wiggly Lock Dim: | '.lockDimensions', |
| ADBE Text Wiggly Random Seed: | '.randomSeed', |
| ADBE Text Range Type2: | '.basedOn', |
| ADBE Text Expressible Amount: | '.amount', |
| ADBE Text Animator Properties: | '.property', |
| ADBE Text Anchor Point 3D: | '.anchorPoint', |
| ADBE Text Position 3D: | '.position', |
| ADBE Text Scale 3D: | '.scale', |
| ADBE Text Skew: | '.skew', |
| ADBE Text Skew Axis: | '.skewAxis', |
| ADBE Text Rotation X: | '.xRotation', |
| ADBE Text Rotation Y: | '.yRotation', |
| ADBE Text Rotation: | '.zRotation', |
| ADBE Text Opacity: | '.opacity', |
| ADBE Text Fill Opacity: | '.fillOpacity', |
| ADBE Text Fill Color: | '.fillColor', |
| ADBE Text Fill Hue: | '.fillHue', |
| ADBE Text Fill Saturation: | '.fillSaturation', |
| ADBE Text Fill Brightness: | '.fillBrightness', |
| ADBE Text Stroke Opacity: | '.strokeOpacity', |
| ADBE Text Stroke Color: | '.strokeColor', |
| ADBE Text Stroke Hue: | '.strokeHue', |
| ADBE Text Stroke Saturation: | '.strokeSaturation', |
| ADBE Text Stroke Brightness: | '.strokeBrightness', |
| ADBE Text Stroke Width: | '.strokeWidth', |
| ADBE Text Line Anchor: | '.lineAnchor', |
| ADBE Text Line Spacing: | '.lineSpacing', |
| ADBE Text Track Type: | '.trackingType', |
| ADBE Text Tracking Amount: | '.trackingAmount', |
| ADBE Text Character Change Type: | '.characterAlignment', |
| ADBE Text Character Range: | '.characterRange', |
| ADBE Text Character Replace: | '.characterValue', |
| ADBE Text Character Offset: | '.characterOffset', |
| ADBE Text Blur: | '.blur', |
| ADBE Mask Parade: | 'mask', |
| ADBE Mask Shape: | '.maskPath', |
| ADBE Mask Feather: | '.maskFeather', |
| ADBE Mask Opacity: | '.maskOpacity', |
| ADBE Mask Offset: | '.maskExpansion', |
| ADBE Effect Parade: | 'effect', |
| ADBE Paint Group: | '.stroke', |
| ADBE Paint Shape: | '.path', |
| ADBE Paint Properties: | '.strokeOption', |
| ADBE Paint Begin: | '.start', |
| ADBE Paint End: | '.end', |
| ADBE Paint Color: | '.color', |
| ADBE Paint Diameter: | '.diameter', |
| ADBE Paint Angle: | '.angle', |
| ADBE Paint Hardness: | '.hardness', |
| ADBE Paint Roundness: | '.roundness', |
| ADBE Paint Tip Spacing: | '.spacing', |
| ADBE Paint Target Channels: | '.channels', |
| ADBE Paint Opacity: | '.opacity', |
| ADBE Paint Flow: | '.flow', |
| ADBE Paint Clone Layer: | '.cloneSource', |
| ADBE Paint Clone Position: | '.clonePosition', |
| ADBE Paint Clone Time: | '.cloneTime', |
| ADBE Paint Clone Time Shift: | '.cloneTimeShift', |
| ADBE Paint Transform: | '.transform', |
| ADBE Paint Anchor Point: | '.anchorPoint', |
| ADBE Paint Position: | '.position', |
| ADBE Paint Scale: | '.scale', |
| ADBE MTrackers: | 'motionTracker', |
| ADBE MTracker Pt Feature Center: | '.featureCenter', |
| ADBE MTracker Pt Feature Size: | '.featureSize', |
| ADBE MTracker Pt Search Ofst: | '.searchOffset', |
| ADBE MTracker Pt Search Size: | '.searchSize', |
| ADBE MTracker Pt Confidence: | '.confidence', |
| ADBE MTracker Pt Attach Pt: | '.attachPoint', |
| ADBE MTracker Pt Attach Pt Ofst: | '.attachPointOffset', |
| ADBE Audio Group: | 'audio', |
| ADBE Audio Levels: | '.audioLevels', |
| ADBE Time Remapping: | 'timeRemap', |
| ADBE Layer Styles: | 'layerStyle', |
| ADBE Blend Options Group: | '.blendingOption', |
| ADBE Global Angle2: | ADBE Global Angle2: |
| ADBE Global Altitude2: | '.globalLightAltitude', |
| ADBE Adv Blend Group: | '.advancedBlending', |
| ADBE Layer Fill Opacity2: | '.fillOpacity', |
| ADBE R Channel Blend: | '.red', |
| ADBE G Channel Blend: | '.green', |
| ADBE B Channel Blend: | '.blue', |
| ADBE Blend Interior: | '.blendInteriorStylesAsGroup', |
| ADBE Blend Ranges: | '.useBlendRangesFromSource', |
| dropShadow/enabled: | '.dropShadow', |
| dropShadow/mode2: | '.blendMode', |
| dropShadow/color: | '.color', |
| dropShadow/opacity: | '.opacity', |
| dropShadow/useGlobalAngle: | '.useGlobalLight', |
| dropShadow/localLightingAngle: | '.angle', |
| dropShadow/distance: | '.distance', |
| dropShadow/chokeMatte: | '.spread', |
| dropShadow/blur: | '.size', |
| dropShadow/noise: | '.noise', |
| dropShadow/layerConceals: | '.layerKnocksOutDropShadow', |
| innerShadow/enabled: | '.innerShadow', |
| innerShadow/mode2: | '.blendMode', |
| innerShadow/color: | '.color', |
| innerShadow/opacity: | '.opacity', |
| innerShadow/useGlobalAngle: | '.useGlobalLight', |
| innerShadow/localLightingAngle: | '.angle', |
| innerShadow/distance: | '.distance', |
| innerShadow/chokeMatte: | '.choke', |
| innerShadow/blur: | '.size', |
| innerShadow/noise: | '.noise', |
| outerGlow/enabled: | '.outerGlow', |
| outerGlow/mode2: | '.blendMode', |
| outerGlow/opacity: | '.opacity', |
| outerGlow/noise: | '.noise', |
| outerGlow/AEColorChoice: | '.colorType', |
| outerGlow/color: | '.color', |
| outerGlow/gradientSmoothness: | '.gradientSmoothness', |
| outerGlow/glowTechnique: | '.technique', |
| outerGlow/chokeMatte: | '.spread', |
| outerGlow/blur: | '.size', |
| outerGlow/inputRange: | '.range', |
| outerGlow/shadingNoise: | '.jitter', |
| innerGlow/enabled: | '.innerGlow', |
| innerGlow/mode2: | '.blendMode', |
| innerGlow/opacity: | '.opacity', |
| innerGlow/noise: | '.noise', |
| innerGlow/AEColorChoice: | '.colorType', |
| innerGlow/color: | '.color', |
| innerGlow/gradientSmoothness: | '.gradientSmoothness', |
| innerGlow/glowTechnique: | '.technique', |
| innerGlow/innerGlowSource: | '.source', |
| innerGlow/chokeMatte: | '.choke', |
| innerGlow/blur: | '.size', |
| innerGlow/inputRange: | '.range', |
| innerGlow/shadingNoise: | '.jitter', |
| bevelEmboss/enabled: | '.bevelAndEmboss', |
| bevelEmboss/bevelStyle: | '.style', |
| bevelEmboss/bevelTechnique: | '.technique', |
| bevelEmboss/strengthRatio: | '.depth', |
| bevelEmboss/bevelDirection: | '.direction', |
| bevelEmboss/blur: | '.size', |
| bevelEmboss/softness: | '.soften', |
| bevelEmboss/useGlobalAngle: | '.useGlobalLight', |
| bevelEmboss/localLightingAngle: | '.angle', |
| bevelEmboss/localLightingAltitude: | '.altitude', |
| bevelEmboss/highlightMode: | '.highlightMode', |
| bevelEmboss/highlightColor: | '.highlightColor', |
| bevelEmboss/highlightOpacity: | '.highlightOpacity', |
| bevelEmboss/shadowMode: | '.shadowMode', |
| bevelEmboss/shadowColor: | '.opacity', |
| innerGlow/opacity: | '.shadowColor', |
| bevelEmboss/shadowOpacity: | '.shadowOpacity', |
| chromeFX/enabled: | '.satin', |
| chromeFX/mode2: | '.blendMode', |
| chromeFX/color: | '.color', |
| chromeFX/opacity: | '.opacity', |
| chromeFX/localLightingAngle: | '.angle', |
| chromeFX/distance: | '.distance', |
| chromeFX/blur: | '.size', |
| chromeFX/invert: | '.invert', |
| solidFill/enabled: | '.colorOverlay', |
| solidFill/mode2: | '.blendMode', |
| solidFill/color: | '.color', |
| solidFill/opacity: | '.opacity', |
| gradientFill/enabled: | '.gradientOverlay', |
| gradientFill/mode2: | '.blendMode', |
| gradientFill/opacity: | '.opacity', |
| gradientFill/gradientSmoothness: | '.gradientSmoothness', |
| gradientFill/angle: | '.angle', |
| gradientFill/type: | '.style', |
| gradientFill/reverse: | '.reverse', |
| gradientFill/align: | '.alignWithLayer', |
| gradientFill/scale: | '.scale', |
| gradientFill/offset: | '.offset', |
| patternFill/enabled: | '.patternOverlay', |
| patternFill/mode2: | '.blendMode', |
| patternFill/opacity: | '.linkWithLayer', |
| patternFill/align: | '.scale', |
| patternFill/scale: | '.opacity', |
| patternFill/phase: | '.offset', |
| frameFX/enabled: | '.blendMode', |
| frameFX/color: | '.color', |
| frameFX/size: | '.size', |
| frameFX/opacity: | '.opacity', |
| innerGlow/opacity: | '.opacity', |
| innerGlow/opacity: | '.opacity', |
| frameFX/style: | '.position', |