---
title: replacementFormatDescription
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avcompositiontrackformatdescriptionreplacement/replacementformatdescription
---

# replacementFormatDescription

The replacement format description.

## Declaration

```swift
var replacementFormatDescription: CMFormatDescription { get }
```

## See Also

### Managing format descriptions

- [originalFormatDescription](avfoundation/avcompositiontrackformatdescriptionreplacement/originalformatdescription.md)