---
title: AVVideoCleanApertureHorizontalOffsetKey
framework: avfoundation
role: symbol
role_heading: Global Variable
path: avfoundation/avvideocleanaperturehorizontaloffsetkey
---

# AVVideoCleanApertureHorizontalOffsetKey

A key to access the horizontal offset of video that’s free from transition artifacts caused by signal encoding.

## Declaration

```swift
let AVVideoCleanApertureHorizontalOffsetKey: String
```

## Discussion

Discussion The value for this key is an instance of NSNumber.

## See Also

### Clean aperture

- [AVVideoCleanApertureKey](avfoundation/avvideocleanaperturekey.md)
- [AVVideoCleanApertureWidthKey](avfoundation/avvideocleanaperturewidthkey.md)
- [AVVideoCleanApertureHeightKey](avfoundation/avvideocleanapertureheightkey.md)
- [AVVideoCleanApertureVerticalOffsetKey](avfoundation/avvideocleanapertureverticaloffsetkey.md)