---
title: kCVImageBufferChromaSubsampling_411
framework: corevideo
role: symbol
role_heading: Global Variable
path: corevideo/kcvimagebufferchromasubsampling_411
---

# kCVImageBufferChromaSubsampling_411

A key that indicates the original chroma-subsampled data used 4:1:1 formatting.

## Declaration

```swift
let kCVImageBufferChromaSubsampling_411: CFString
```

## Discussion

Discussion Each pixel has a Y value, and U and V values are shared along a horizontal line of 4 pixels.

## See Also

### Constants

- [kCVImageBufferChromaSubsampling_420](corevideo/kcvimagebufferchromasubsampling_420.md)
- [kCVImageBufferChromaSubsampling_422](corevideo/kcvimagebufferchromasubsampling_422.md)