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

# previousFrame

Previous source frame in presentation time order, which is nil for the first frame.

## Declaration

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

## See Also

### Inspecting the parameters

- [sourceFrame](videotoolbox/vtsuperresolutionscalerparameters/sourceframe.md)
- [previousOutputFrame](videotoolbox/vtsuperresolutionscalerparameters/previousoutputframe.md)
- [opticalFlow](videotoolbox/vtsuperresolutionscalerparameters/opticalflow.md)
- [submissionMode](videotoolbox/vtsuperresolutionscalerparameters/submissionmode-swift.property.md)
- [VTSuperResolutionScalerParameters.SubmissionMode](videotoolbox/vtsuperresolutionscalerparameters/submissionmode-swift.enum.md)