LayeredComposition class

Composition that mimics the kind of video layout achieved in programs like Premier and After Effects.

A LayeredComposition is comprised of 1 or more Layers. Layers are stacked on top of one another in the z-index of the screen.

Each Layer may contain any number of LayerSpans that take up time within the Layer. LayerSpans may not overlap each other, but empty space is permitted between LayerSpans, allowing for easy and precise positioning of a given clip in time. Whatever empty space exists is in a Layer is automatically filled with TransparentCompositions because FFMPEG requires that all time be filled.

Implemented types

• Composition

Constructors

LayeredComposition({required List<Layer> layers})

Properties

hashCode → int

The hash code for this object.

no setter, inherited

layers → List<Layer>

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

build(FfmpegBuilder builder, CompositionSettings settings) → Future<FfmpegStream>

Adds this composition to the composition tree in the given builder.

override

computeIntrinsicDuration() → Future<Duration>

Computes the natural, or intrinsic, duration of this composition.

override

computeIntrinsicSize() → Future<VideoSize>

Computes the natural, or intrinsic, size of this composition.

override

createDiagnosticsNode() → DiagnosticsNode

override

hasAudio() → Future<bool>

Whether this composition includes any audio streams.

override

hasVideo() → Future<bool>

Whether this composition includes any video frames.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited