---
title: QCCompositionInputPaceKey
framework: quartz
role: symbol
role_heading: Global Variable
path: quartz/qccompositioninputpacekey
---

# QCCompositionInputPaceKey

A number input port whose key is inputPace. The value must be in the [0,1] range.

## Declaration

```swift
let QCCompositionInputPaceKey: String
```

## See Also

### Constants

- [QCCompositionAttributeBuiltInKey](quartz/qccompositionattributebuiltinkey.md)
- [QCCompositionAttributeCategoryKey](quartz/qccompositionattributecategorykey.md)
- [QCCompositionAttributeCopyrightKey](quartz/qccompositionattributecopyrightkey.md)
- [QCCompositionAttributeDescriptionKey](quartz/qccompositionattributedescriptionkey.md)
- [QCCompositionAttributeHasConsumersKey](quartz/qccompositionattributehasconsumerskey.md)
- [QCCompositionAttributeIsTimeDependentKey](quartz/qccompositionattributeistimedependentkey.md)
- [QCCompositionAttributeNameKey](quartz/qccompositionattributenamekey.md)
- [QCCompositionCategoryDistortion](quartz/qccompositioncategorydistortion.md)
- [QCCompositionCategoryStylize](quartz/qccompositioncategorystylize.md)
- [QCCompositionCategoryUtility](quartz/qccompositioncategoryutility.md)
- [QCCompositionInputAudioPeakKey](quartz/qccompositioninputaudiopeakkey.md)
- [QCCompositionInputAudioSpectrumKey](quartz/qccompositioninputaudiospectrumkey.md)
- [QCCompositionInputDestinationImageKey](quartz/qccompositioninputdestinationimagekey.md)
- [QCCompositionInputImageKey](quartz/qccompositioninputimagekey.md)
- [QCCompositionInputPreviewModeKey](quartz/qccompositioninputpreviewmodekey.md)