---
title: kCVImageBufferChromaSubsampling_420
framework: corevideo
role: symbol
role_heading: Global Variable
path: corevideo/kcvimagebufferchromasubsampling_420
---

# kCVImageBufferChromaSubsampling_420

A key that indicates the original chroma-subsampled data used 4:2:0 formatting.

## Declaration

```swift
let kCVImageBufferChromaSubsampling_420: CFString
```

## Discussion

Discussion Each pixel has a Y value, and U and V values are shared within a square of 4 pixels.

## See Also

### Constants

- [kCVImageBufferChromaSubsampling_422](corevideo/kcvimagebufferchromasubsampling_422.md)
- [kCVImageBufferChromaSubsampling_411](corevideo/kcvimagebufferchromasubsampling_411.md)