---
title: kCVMetalBufferCacheMaximumBufferAgeKey
framework: corevideo
role: symbol
role_heading: Global Variable
path: corevideo/kcvmetalbuffercachemaximumbufferagekey
---

# kCVMetalBufferCacheMaximumBufferAgeKey

## Declaration

```swift
let kCVMetalBufferCacheMaximumBufferAgeKey: CFString
```