---
title: kCMFormatDescriptionTransferFunction_SMPTE_ST_428_1
framework: coremedia
role: symbol
role_heading: Global Variable
path: coremedia/kcmformatdescriptiontransferfunction_smpte_st_428_1
---

# kCMFormatDescriptionTransferFunction_SMPTE_ST_428_1

## Declaration

```swift
let kCMFormatDescriptionTransferFunction_SMPTE_ST_428_1: CFString
```

## See Also

### Constants

- [kCMFormatDescriptionTransferFunction_ITU_R_2020](coremedia/kcmformatdescriptiontransferfunction_itu_r_2020.md)
- [kCMFormatDescriptionTransferFunction_ITU_R_709_2](coremedia/kcmformatdescriptiontransferfunction_itu_r_709_2-swift.var.md)
- [kCMFormatDescriptionTransferFunction_SMPTE_240M_1995](coremedia/kcmformatdescriptiontransferfunction_smpte_240m_1995-swift.var.md)
- [kCMFormatDescriptionTransferFunction_UseGamma](coremedia/kcmformatdescriptiontransferfunction_usegamma-swift.var.md)