---
title: "RequestDescriptor.trackOpticalFlowRequest(_:)"
framework: vision
role: symbol
role_heading: Case
path: "vision/requestdescriptor/trackopticalflowrequest(_:)"
---

# RequestDescriptor.trackOpticalFlowRequest(_:)

A descriptor that describes a track optical flow request.

## Declaration

```swift
case trackOpticalFlowRequest(TrackOpticalFlowRequest.Revision)
```

## See Also

### Getting the optical flow, rectangle and barcode detection descriptor

- [RequestDescriptor.detectRectanglesRequest(_:)](vision/requestdescriptor/detectrectanglesrequest(_:).md)
- [RequestDescriptor.detectBarcodesRequest(_:)](vision/requestdescriptor/detectbarcodesrequest(_:).md)