---
title: "init(frameWidth:frameHeight:qualityPrioritization:revision:)"
framework: videotoolbox
role: symbol
role_heading: Initializer
path: "videotoolbox/vtopticalflowconfiguration/init(framewidth:frameheight:qualityprioritization:revision:)"
---

# init(frameWidth:frameHeight:qualityPrioritization:revision:)

## Declaration

```swift
init?(frameWidth: Int, frameHeight: Int, qualityPrioritization: VTOpticalFlowConfiguration.QualityPrioritization, revision: VTOpticalFlowConfiguration.Revision)
```

## Parameters

- `frameWidth`: The width of source frame in pixels. The maximum value is 8192 pixels for macOS, and 4096 pixels for iOS.
- `frameHeight`: The height of source frame in pixels. The maximum value is 4320 pixels for macOS, and 2160 pixels for iOS.
- `qualityPrioritization`: Instance to control quality and performance levels. See VEFrameRateConversionConfigurationQualityPrioritization for more information.
- `revision`: The specific algorithm or configuration revision that is to be used to perform the request.