---
title: kCMTimeEpochKey
framework: coremedia
role: symbol
role_heading: Global Variable
path: coremedia/kcmtimeepochkey
---

# kCMTimeEpochKey

A dictionary key for a time epoch.

## Declaration

```swift
let kCMTimeEpochKey: CFString
```

## See Also

### Constants

- [kCMTimeValueKey](coremedia/kcmtimevaluekey.md)
- [kCMTimeScaleKey](coremedia/kcmtimescalekey.md)
- [kCMTimeFlagsKey](coremedia/kcmtimeflagskey.md)