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

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

Creates a new motion blur configuration with specified flow width and height.

## Declaration

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

## Parameters

- `frameWidth`: The width of the source frame in pixels. Maximum value is 8192 pixels for macOS, and 4096 pixels for iOS.
- `frameHeight`: The height of the source frame in pixels. Maximum value is 4320 pixels for macOS, and 2160 pixels for iOS.
- `usePrecomputedFlow`: If true it indicates that the optical flow will be provided by the user, if false this configuration will compute the optical flow on the fly.
- `qualityPrioritization`: Instance to control quality and performance levels. See VEMotionBlurConfigurationQualityPrioritization for more information.
- `revision`: The specific algorithm or configuration revision that is to be used to perform the request.

## Discussion

Discussion Initialization fails if the dimensions are out of range or revision is unsupported.