---
title: AVCaptureTimecode.SourceType.realTimeClock
framework: AVFoundation
role: symbol
role_heading: Case
platforms: [iOS 26.0+, iPadOS 26.0+, Mac Catalyst 26.0+, macOS 26.0+, tvOS 26.0+]
path: avfoundation/avcapturetimecode/sourcetype-swift.enum/realtimeclock
---

# AVCaptureTimecode.SourceType.realTimeClock

Synchronizes timecode to the system clock for real-time applications. Useful for live events or scenarios requiring alignment with the actual time of day.

## Declaration

```swift
case realTimeClock
```

## See Also

### Source types

- [AVCaptureTimecode.SourceType.external](avfoundation/avcapturetimecode/sourcetype-swift.enum/external.md)
- [AVCaptureTimecode.SourceType.frameCount](avfoundation/avcapturetimecode/sourcetype-swift.enum/framecount.md)