---
title: previousFrame
framework: videotoolbox
role: symbol
role_heading: Instance Property
path: videotoolbox/vtmotionblurparameters/previousframe
---

# previousFrame

The previous source frame in presentation time order.

## Declaration

```swift
var previousFrame: VTFrameProcessorFrame? { get }
```

## Discussion

Discussion This value can be set to nil for the first frame.

## See Also

### Inspecting the parameters

- [sourceFrame](videotoolbox/vtmotionblurparameters/sourceframe.md)
- [nextFrame](videotoolbox/vtmotionblurparameters/nextframe.md)
- [motionBlurStrength](videotoolbox/vtmotionblurparameters/motionblurstrength.md)
- [nextOpticalFlow](videotoolbox/vtmotionblurparameters/nextopticalflow.md)
- [previousOpticalFlow](videotoolbox/vtmotionblurparameters/previousopticalflow.md)
- [submissionMode](videotoolbox/vtmotionblurparameters/submissionmode-swift.property.md)
- [VTMotionBlurParameters.SubmissionMode](videotoolbox/vtmotionblurparameters/submissionmode-swift.enum.md)