---
title: containsTweening
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avvideocompositioninstructionprotocol/containstweening
---

# containsTweening

A Boolean value that indicates whether the composition contains tweening.

## Declaration

```swift
var containsTweening: Bool { get }
```

## Discussion

Discussion A value of true indicates that rendering a frame from the same source buffers and the same composition instruction at two different compositionTime values may yield different output frames. A value of false indicates that two compositions yield the same frame.