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How to Keyframe The Wiggle Expression in After Effects, Wiggle Effects in After Effects.
The wiggle expression is a powerful way to create random movement (like camera shake or flickering) without manually keyframing. But many people wonder how to keyframe the wiggle effect - that is, control when it starts, stops, or changes intensity over time.
Here's a step-by-step guide to keyframing the wiggle expression and controlling wiggle effects in After Effects.

Basic Wiggle Expression Syntax
• wiggle(frequency, amplitude)
• frequency = how many times per second the property changes
• amplitude = how far the property moves (in pixels, degrees, etc.)

Example:
• wiggle(5, 20)
• Shakes the property 5 times per second with 20 units of movement.

How to Add the Wiggle Expression:
• Select the layer you want to apply the wiggle to.
• Press P (for Position) or any other property (like Rotation, Opacity, etc.).
• Alt+Click (Windows) or Option+Click (Mac) the stopwatch to enable expressions.
• Type your wiggle expression (e.g., wiggle(3, 30)).
• Click outside the expression box to apply it.
How to Keyframe the Wiggle Expression (3 Ways)

1. Keyframe a Slider Control (Best Method)
This gives you full control over wiggle intensity or speed using keyframes.
Steps:
• Select your layer.
• Go to Effect → Expression Controls → Slider Control.
• Rename the sliders (e.g., "Frequency" and "Amplitude").
• Add keyframes to the sliders over time.

Use this expression on your property (e.g., Position):
• wiggle(effect("Frequency")("Slider"), effect("Amplitude")("Slider"))
• Now you can keyframe the slider values ​​to animate the wiggle effect - like ramping it up or down!

2. Use Conditional Wiggle with Time Ranges
You can control when the wiggle is active using if statements and the time variable.
Example: Wiggle only from second 1 to 3:
if (time → 1 && time → 3) {
wiggle(5, 50);
} else {
value;
}
This is great for starting or stopping the wiggle at specific times.
3. Wiggle Based on Audio or Other Properties:
You can link wiggle values ​​to audio amplitude, expressions, or even parenting.
For instance, link wiggle intensity to an Audio Amplitude layer using expressions.
Example Use: Handheld Camera Shake
Add wiggle to the camera position:
• wiggle(2, 30)
• Use sliders to animate shake during specific scenes.
• Add motion blur for realism.

Pro Tips:
Use expression controls (like sliders) for more flexibility and easy adjustments.
Use value in expressions to preserve the original keyframed value when not wiggling:
wiggleOn = false;
if (wiggleOn) {
wiggle(3, 40)
} else {
value;
}
Combine wiggle with other effects like Gaussian Blur or Opacity flickers for glitchy effects.

Summary:
Task → Method
• Control wiggle over time → Use Slider Controls + Keyframes
• Start/Stop wiggle → Use if (time → x) expressions
• Vary wiggle dynamically → Use expressions tied to other properties

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