AVVideoCompositionInstruction (moe.platform.ios API)

All Known Implementing Classes:

AVMutableVideoCompositionInstruction, AVVideoCompositionInstruction
```
public interface AVVideoCompositionInstruction
```
[@protocol] AVVideoCompositionInstruction The AVVideoCompositionInstruction protocol is implemented by objects to represent operations to be performed by a compositor.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`containsTweening()`	If YES, rendering a frame from the same source buffers and the same composition instruction at 2 different compositionTime may yield different output frames.
`boolean`	`enablePostProcessing()`	If NO, indicates that post-processing should be skipped for the duration of this instruction.
`int`	`passthroughTrackID()`	kCMPersistentTrackID_Invalid if not a passthrough instruction
`NSArray<? extends NSValue>`	`requiredSourceTrackIDs()`	List of video track IDs required to compose frames for this instruction.
`CMTimeRange`	`timeRange()`	Indicates the timeRange during which the instruction is effective.

- Method Detail
  - containsTweening
```
boolean containsTweening()
```
    If YES, rendering a frame from the same source buffers and the same composition instruction at 2 different compositionTime may yield different output frames. If NO, 2 such compositions would yield the same frame. The media pipeline may me able to avoid some duplicate processing when containsTweening is NO
  - enablePostProcessing
```
boolean enablePostProcessing()
```
    If NO, indicates that post-processing should be skipped for the duration of this instruction. See +[AVVideoCompositionCoreAnimationTool videoCompositionToolWithPostProcessingAsVideoLayer:inLayer:].
  - passthroughTrackID
```
int passthroughTrackID()
```
    kCMPersistentTrackID_Invalid if not a passthrough instruction
  - requiredSourceTrackIDs
```
NSArray<? extends NSValue> requiredSourceTrackIDs()
```
    List of video track IDs required to compose frames for this instruction. If the value of this property is nil, all source tracks will be considered required for composition
  - timeRange
```
CMTimeRange timeRange()
```
    Indicates the timeRange during which the instruction is effective. Note requirements for the timeRanges of instructions described in connection with AVVideoComposition's instructions key above.