---
title: startCompositionTime
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avvideocompositionrenderhint/startcompositiontime
---

# startCompositionTime

The start time of the upcoming composition requests.

## Declaration

```swift
var startCompositionTime: CMTime { get }
```

## See Also

### Managing composition timing

- [endCompositionTime](avfoundation/avvideocompositionrenderhint/endcompositiontime.md)