---
title: "CMTimebaseSetRate(_:rate:)"
framework: coremedia
role: symbol
role_heading: Function
path: "coremedia/cmtimebasesetrate(_:rate:)"
---

# CMTimebaseSetRate(_:rate:)

Sets the rate of a timebase.

## Declaration

```swift
func CMTimebaseSetRate(_ timebase: CMTimebase, rate: Float64) -> OSStatus
```

## See Also

### Getting and Setting the Time Rate

- [CMTimebaseGetRate(_:)](coremedia/cmtimebasegetrate(_:).md)
- [CMTimebaseGetEffectiveRate(_:)](coremedia/cmtimebasegeteffectiverate(_:).md)
- [CMTimebaseSetRateAndAnchorTime(_:rate:anchorTime:immediateSourceTime:)](coremedia/cmtimebasesetrateandanchortime(_:rate:anchortime:immediatesourcetime:).md)