---
title: Dictionary Keys
framework: coremedia
role: collectionGroup
role_heading: API Collection
path: coremedia/cmtime-dictionary-keys
---

# Dictionary Keys

Keys to use when working with dictionary representations of time.

## Topics

### Constants

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

## See Also

### Constants

- [Time](coremedia/cmtime-time.md)
- [Timescale](coremedia/cmtime-timescale.md)