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MovieLite provides a comprehensive suite of visual effects that can be applied to video clips. All effects inherit from the GraphicEffect base class and can be added to clips using the add_effect() method.

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Available Effects

Fade Effects

Smooth fade-in and fade-out transitions by animating opacity

Blur Effects

Gaussian blur effects including static, animated, blur-in, and blur-out

Color Effects

Color adjustments: saturation, brightness, contrast, grayscale, and sepia

Zoom Effects

Zoom-in, zoom-out, and cinematic Ken Burns effects

Glitch Effects

Digital distortion: glitch, chromatic aberration, and pixelate

Rotation

Static and animated rotation with customizable options

Vignette

Darken edges to create a vignette effect

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Basic Usage

All visual effects are applied using the add_effect() method: 
from movielite import VideoClip, vfx

# Load a video clip
clip = VideoClip("input.mp4")

# Add effects
clip.add_effect(vfx.FadeIn(duration=2.0))
clip.add_effect(vfx.Saturation(factor=1.5))
clip.add_effect(vfx.Vignette(intensity=0.5, radius=0.8))

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Combining Effects

Multiple effects can be chained together and will be applied in the order they are added: 
clip = VideoClip("input.mp4")

# Effects are applied sequentially
clip.add_effect(vfx.FadeIn(1.0))
clip.add_effect(vfx.Brightness(1.2))
clip.add_effect(vfx.Contrast(1.3))
clip.add_effect(vfx.Vignette(intensity=0.4))
clip.add_effect(vfx.FadeOut(1.5))

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Effect Categories

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Opacity Effects

  • FadeIn: Gradually increase opacity from 0 to full
  • FadeOut: Gradually decrease opacity to 0

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Blur Effects

  • Blur: Apply static or animated Gaussian blur
  • BlurIn: Start blurred and become sharp
  • BlurOut: Start sharp and become blurred

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Color Adjustments

  • Saturation: Adjust color saturation (0.0 = grayscale, >1.0 = more saturated)
  • Brightness: Adjust brightness/exposure
  • Contrast: Adjust contrast
  • BlackAndWhite / Grayscale: Convert to grayscale
  • Sepia: Apply vintage sepia tone

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Motion & Transform

  • ZoomIn: Gradually scale up the clip
  • ZoomOut: Gradually scale down the clip
  • KenBurns: Cinematic slow zoom + pan effect
  • Rotation: Rotate by a specific angle (static or animated)

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Distortion & Stylization

  • Glitch: Digital glitch artifacts with RGB shift
  • ChromaticAberration: Lens distortion effect
  • Pixelate: Blocky pixelation effect
  • Vignette: Darken frame edges

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Performance Considerations

Some effects use Numba JIT compilation for optimized performance (e.g., Brightness, Contrast). The first frame may take slightly longer to process while the JIT compiler optimizes the code.
Effects like Blur and Rotation use OpenCV’s optimized functions for fast processing, even at high resolutions.

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Next Steps

Explore individual effect documentation for detailed parameters, examples, and usage patterns:

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