<!--
{
  "availability" : [
    "iOS: 7.0.0 -",
    "iPadOS: 7.0.0 -",
    "macCatalyst: 13.1.0 -",
    "macOS: 10.9.0 -",
    "tvOS: 9.0.0 -",
    "visionOS: 1.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "AVFoundation",
  "identifier" : "/documentation/AVFoundation/AVOutputSettingsAssistant/sourceVideoFormat",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "AVFoundation"
    ],
    "preciseIdentifier" : "c:objc(cs)AVOutputSettingsAssistant(py)sourceVideoFormat"
  },
  "title" : "sourceVideoFormat"
}
-->

# sourceVideoFormat

The format of the source video data.

```
var sourceVideoFormat: CMVideoFormatDescription? { get set }
```

## Discussion

The default value is `nil`, which means the assistant doesn’t know the video format. Setting a value for this property helps the assistant generate more complete video settings. After setting a value, requery the [`videoSettings`](/documentation/AVFoundation/AVOutputSettingsAssistant/videoSettings) property to get the latest values.

---

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)