This skill enables programmatic control of Adobe After Effects via ExtendScript (.jsx) automation and command-line tools.

🛠️ Core Capabilities

1. ExtendScript Automation

Use scripts/ae_script.jsx to execute After Effects operations:

• Create/modify compositions
• Add layers, effects, keyframes
• Batch render projects
• Manipulate project structure

2. Command-Line Rendering

Use aerender (After Effects command-line renderer) for:

• Headless rendering
• Batch processing
• Queue management

3. Project Template System

Use assets/templates/ for reusable AE project templates.

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📋 Usage Patterns

Pattern 1: Create Composition Programmatically

// scripts/create_comp.jsx
var comp = app.project.items.addComp("MyComp", 1920, 1080, 1, 30, 300);
var solid = comp.layers.addSolid([1,0,0], "Red Solid", 1920, 1080, 1);

Pattern 2: Batch Render Project

aerender -project ./my_project.aep -output ./output.mov -mp

Pattern 3: Apply Effect via Script

// scripts/apply_effect.jsx
var layer = app.project.activeItem.selectedLayer(1);
layer.property("ADBE Effect Parade").addProperty("ADBE Gaussian Blur");

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🔧 Available Scripts

Script	Purpose
create_comp.jsx	Create new composition with specified params
batch_render.jsx	Queue multiple compositions for render
apply_effect.jsx	Apply effects to selected layers
export_template.jsx	Save project as template (.aet)

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🚀 Quick Start Workflow

• Check AE Installation: Verify After Effects is installed

   which aerender
   

• Load Project: Open existing .aep or create new

   app.open(new File("./my_project.aep"));
   

• Execute Script: Run ExtendScript via:

- AE: File → Scripts → Run Script File - Command-line: aerender -script ./myscript.jsx

• Render Output: Use aerender for headless rendering

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⚠️ Requirements

• Adobe After Effects installed (CC 2019+)
• ExtendScript Toolkit (optional, for debugging)
• aerender in PATH for command-line rendering

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📚 References

• ExtendScript Guide: See references/extendscript_api.md
• Effect Names: See references/effect_names.md
• Render Settings: See references/render_settings.md

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🎯 Monitoring

Be verbose about:

• Composition settings (resolution, duration, framerate)
• Effect choices and parameters
• Render queue status
• Output format decisions

// scripts/create_comp.jsx
var comp = app.project.items.addComp("MyComp", 1920, 1080, 1, 30, 300);
var solid = comp.layers.addSolid([1,0,0], "Red Solid", 1920, 1080, 1);

aerender -project ./my_project.aep -output ./output.mov -mp

// scripts/apply_effect.jsx
var layer = app.project.activeItem.selectedLayer(1);
layer.property("ADBE Effect Parade").addProperty("ADBE Gaussian Blur");

   which aerender
   

   app.open(new File("./my_project.aep"));