Class: AVVideoCompositionLayerInstruction
Overview
An AVVideoCompositionLayerInstruction object represents the transform and opacity ramps to apply to a given track.
Direct Known Subclasses
Instance Attribute Summary (collapse)
-
- trackID
readonly
The trackID of the source track to which the compositor will apply the instruction.
Instance Method Summary (collapse)
-
- getOpacityRampForTime:startOpacity:endOpacity:timeRange:
Obtains the opacity ramp that includes a specified time.
-
- getTransformRampForTime:startTransform:endTransform:timeRange:
Obtains the transform ramp that includes a specified time.
Methods inherited from NSObject
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Constructor Details
This class inherits a constructor from NSObject
Dynamic Method Handling
This class handles dynamic methods through the method_missing method in the class NSObject
Instance Attribute Details
- (CMPersistentTrackID) trackID (readonly)
The trackID of the source track to which the compositor will apply the instruction. (read-only)
Instance Method Details
- (Boolean) getOpacityRampForTime(time, startOpacity:startOpacity, endOpacity:endOpacity, timeRange:timeRange)
Obtains the opacity ramp that includes a specified time.
- (Boolean) getTransformRampForTime(time, startTransform:startTransform, endTransform:endTransform, timeRange:timeRange)
Obtains the transform ramp that includes a specified time.