---
title: sourceIdentifier
framework: coremediaio
role: symbol
role_heading: Instance Property
path: coremediaio/cmioextensionstreamcustomclockconfiguration/sourceidentifier
---

# sourceIdentifier

A universally unique identifier for the clock.

## Declaration

```swift
var sourceIdentifier: UUID { get }
```

## See Also

### Inspecting the Configuration

- [clockName](coremediaio/cmioextensionstreamcustomclockconfiguration/clockname.md)
- [getTimeCallMinimumInterval](coremediaio/cmioextensionstreamcustomclockconfiguration/gettimecallminimuminterval.md)
- [numberOfEventsForRateSmoothing](coremediaio/cmioextensionstreamcustomclockconfiguration/numberofeventsforratesmoothing.md)
- [numberOfAveragesForRateSmoothing](coremediaio/cmioextensionstreamcustomclockconfiguration/numberofaveragesforratesmoothing.md)