Effects Package (effects)

The effects package provides pre-constructed, type-safe filter nodes for common video transformations.

Pre-built Filters

ScaleFilter

Scales video to specified dimensions with aspect ratio preservation options.

filter := effects.NewScaleFilter(1920, 1080, effects.ScaleModeFit)

DrawTextFilter

Draws stylized text onto a video stream with custom font, size, color, and box background.

textFilter := effects.NewDrawTextFilter("Title Text", "/fonts/Inter.ttf", 48, types.White).
    WithBox(types.Black, 0.6)

VolumeFilter

Adjusts audio gain linearly or logarithmically in decibels.

volFilter := effects.NewVolumeFilter(0.5) // 50% volume

XFadeFilter

Crossfades between two video streams with customizable transition curves.

xfade := effects.NewXFadeFilter(effects.XFadeFade, 1*time.Second, 5*time.Second)