<!--
{
  "availability" : [
    "macOS: 15.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "VideoToolbox",
  "identifier" : "/documentation/VideoToolbox/VTRAWProcessingSession/Parameter",
  "metadataVersion" : "0.1.0",
  "role" : "Enumeration",
  "symbol" : {
    "kind" : "Enumeration",
    "modules" : [
      "Video Toolbox",
      "VideoToolbox"
    ],
    "preciseIdentifier" : "s:So25VTRAWProcessingSessionRefa12VideoToolboxE9ParameterO"
  },
  "title" : "VTRAWProcessingSession.Parameter"
}
-->

# VTRAWProcessingSession.Parameter

A parameter expresses a control or a set of controls that influence frame processing.

```
enum Parameter
```

## Overview

Parameters can represent Boolean options, integer or floating-point ranges, lists, or subgroups. All parameters have a collection of [`VTRAWProcessingSession.Parameter.Details`](/documentation/VideoToolbox/VTRAWProcessingSession/Parameter/Details) containing a localized name suitable for display in UI, a longer localized description string, and a Boolean that indicates whether it’s enabled. All details, except for subgroups, must have a “key” string used to uniquely identify that parameter. All parameters other than subgroups have a collection of [`VTRAWProcessingSession.Parameter.Values`](/documentation/VideoToolbox/VTRAWProcessingSession/Parameter/Values) containing a mandatory “initial” value, and optional “neutral” and “camera” values. [`VTRAWProcessingSession.Parameter.IntegerParameter`](/documentation/VideoToolbox/VTRAWProcessingSession/Parameter/IntegerParameter) and [`VTRAWProcessingSession.Parameter.FloatParameter`](/documentation/VideoToolbox/VTRAWProcessingSession/Parameter/FloatParameter) are required to have “minimum” and “maximum” values in their Values

Parameter arrays are created and returned by the VideoToolbox framework.

## Topics

### Parameters

[`struct BooleanParameter`](/documentation/VideoToolbox/VTRAWProcessingSession/Parameter/BooleanParameter)

[`struct Details`](/documentation/VideoToolbox/VTRAWProcessingSession/Parameter/Details)

[`struct FloatParameter`](/documentation/VideoToolbox/VTRAWProcessingSession/Parameter/FloatParameter)

[`struct IntegerParameter`](/documentation/VideoToolbox/VTRAWProcessingSession/Parameter/IntegerParameter)

[`struct ListParameter`](/documentation/VideoToolbox/VTRAWProcessingSession/Parameter/ListParameter)

[`struct Values`](/documentation/VideoToolbox/VTRAWProcessingSession/Parameter/Values)

### Enumeration Cases

[`case bool(VTRAWProcessingSession.Parameter.BooleanParameter)`](/documentation/VideoToolbox/VTRAWProcessingSession/Parameter/bool(_:))

[`case float(VTRAWProcessingSession.Parameter.FloatParameter)`](/documentation/VideoToolbox/VTRAWProcessingSession/Parameter/float(_:))

[`case int(VTRAWProcessingSession.Parameter.IntegerParameter)`](/documentation/VideoToolbox/VTRAWProcessingSession/Parameter/int(_:))

[`case list(VTRAWProcessingSession.Parameter.ListParameter)`](/documentation/VideoToolbox/VTRAWProcessingSession/Parameter/list(_:))

[`case subgroup(details: VTRAWProcessingSession.Parameter.Details, elements: [VTRAWProcessingSession.Parameter])`](/documentation/VideoToolbox/VTRAWProcessingSession/Parameter/subgroup(details:elements:))

## Relationships

### Conforms To

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Equatable`](/documentation/Swift/Equatable)

[`Sendable`](/documentation/Swift/Sendable)

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)