---
title: kVTCompressionPropertyKey_BaseLayerBitRateFraction
framework: videotoolbox
role: symbol
role_heading: Global Variable
path: videotoolbox/kvtcompressionpropertykey_baselayerbitratefraction
---

# kVTCompressionPropertyKey_BaseLayerBitRateFraction

## Declaration

```swift
let kVTCompressionPropertyKey_BaseLayerBitRateFraction: CFString
```

## See Also

### Temporal Scalability

- [kVTCompressionPropertyKey_BaseLayerFrameRate](videotoolbox/kvtcompressionpropertykey_baselayerframerate.md)
- [kVTCompressionPropertyKey_BaseLayerFrameRateFraction](videotoolbox/kvtcompressionpropertykey_baselayerframeratefraction.md)