---
title: kCVImageBufferTransferFunction_ITU_R_709_2
framework: corevideo
role: symbol
role_heading: Global Variable
path: corevideo/kcvimagebuffertransferfunction_itu_r_709_2
---

# kCVImageBufferTransferFunction_ITU_R_709_2

A key to the transfer function for high-definition and standard-definition video.

## Declaration

```swift
let kCVImageBufferTransferFunction_ITU_R_709_2: CFString
```

## Discussion

Discussion tip: Most apps should use this constant.

## See Also

### Constants

- [kCVImageBufferTransferFunction_SMPTE_240M_1995](corevideo/kcvimagebuffertransferfunction_smpte_240m_1995.md)
- [kCVImageBufferTransferFunction_UseGamma](corevideo/kcvimagebuffertransferfunction_usegamma.md)
- [kCVImageBufferTransferFunction_sRGB](corevideo/kcvimagebuffertransferfunction_srgb.md)
- [kCVImageBufferTransferFunction_ITU_R_2020](corevideo/kcvimagebuffertransferfunction_itu_r_2020.md)
- [kCVImageBufferTransferFunction_SMPTE_ST_428_1](corevideo/kcvimagebuffertransferfunction_smpte_st_428_1.md)
- [kCVImageBufferTransferFunction_ITU_R_2100_HLG](corevideo/kcvimagebuffertransferfunction_itu_r_2100_hlg.md)
- [kCVImageBufferTransferFunction_SMPTE_ST_2084_PQ](corevideo/kcvimagebuffertransferfunction_smpte_st_2084_pq.md)
- [kCVImageBufferLogTransferFunction_AppleLog2](corevideo/kcvimagebufferlogtransferfunction_applelog2.md)