---
title: CMClockOrTimebase
framework: coremedia
role: symbol
role_heading: Type Alias
path: coremedia/cmclockortimebase
---

# CMClockOrTimebase

A type you use in argument lists and function results to indicate that you can pass either a clock or timebase.

## Declaration

```swift
typealias CMClockOrTimebase = CFTypeRef
```

## See Also

### Data Types

- [CMClock](coremedia/cmclock.md)
- [CMClockGetTypeID()](coremedia/cmclockgettypeid().md)