---
title: "setRateAndAnchorTime(rate:anchorTime:referenceTime:)"
framework: coremedia
role: symbol
role_heading: Instance Method
path: "coremedia/cmtimebase/setrateandanchortime(rate:anchortime:referencetime:)"
---

# setRateAndAnchorTime(rate:anchorTime:referenceTime:)

Sets the time at a particular primary time, and changes the rate at exactly that time.

## Declaration

```swift
func setRateAndAnchorTime(rate: Double, anchorTime: CMTime, referenceTime: CMTime) throws
```

## See Also

### Getting and Setting the Timebase Rate

- [setRate(_:)](coremedia/cmtimebase/setrate(_:).md)