---
title: destinationOpticalFlow
framework: videotoolbox
role: symbol
role_heading: Instance Property
path: videotoolbox/vtopticalflowparameters/destinationopticalflow
---

# destinationOpticalFlow

A user allocated mutable optical flow that will receive the results.

## Declaration

```swift
var destinationOpticalFlow: VTFrameProcessorOpticalFlow { get }
```

## See Also

### Inspecting the parameters

- [sourceFrame](videotoolbox/vtopticalflowparameters/sourceframe.md)
- [nextFrame](videotoolbox/vtopticalflowparameters/nextframe.md)
- [submissionMode](videotoolbox/vtopticalflowparameters/submissionmode-swift.property.md)
- [VTOpticalFlowParameters.SubmissionMode](videotoolbox/vtopticalflowparameters/submissionmode-swift.enum.md)