---
title: "CMTimebaseSetSourceTimebase(_:_:)"
framework: coremedia
role: symbol
role_heading: Function
path: "coremedia/cmtimebasesetsourcetimebase(_:_:)"
---

# CMTimebaseSetSourceTimebase(_:_:)

Sets the source timebase of a timebase.

## Declaration

```swift
func CMTimebaseSetSourceTimebase(_ timebase: CMTimebase, _ newSourceTimebase: CMTimebase) -> OSStatus
```

## See Also

### Getting and Setting Time

- [CMTimebaseGetTime(_:)](coremedia/cmtimebasegettime(_:).md)
- [CMTimebaseGetTimeWithTimeScale(_:timescale:method:)](coremedia/cmtimebasegettimewithtimescale(_:timescale:method:).md)
- [CMTimebaseGetTimeAndRate(_:timeOut:rateOut:)](coremedia/cmtimebasegettimeandrate(_:timeout:rateout:).md)
- [CMTimebaseSetTime(_:time:)](coremedia/cmtimebasesettime(_:time:).md)
- [CMTimebaseSetSourceClock(_:_:)](coremedia/cmtimebasesetsourceclock(_:_:).md)
- [CMTimebaseSetAnchorTime(_:timebaseTime:immediateSourceTime:)](coremedia/cmtimebasesetanchortime(_:timebasetime:immediatesourcetime:).md)