---
title: formatDescriptionReplacements
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avcompositiontrack/formatdescriptionreplacements
---

# formatDescriptionReplacements

The replacement format descriptions.

## Declaration

```swift
var formatDescriptionReplacements: [AVCompositionTrackFormatDescriptionReplacement] { get }
```

## Discussion

Discussion The property’s values specify an original and a replacement format description, as set in a previous call to replaceFormatDescription(_:with:).

## See Also

### Managing format descriptions

- [formatDescriptions](avfoundation/avcompositiontrack/formatdescriptions.md)
- [AVCompositionTrackFormatDescriptionReplacement](avfoundation/avcompositiontrackformatdescriptionreplacement.md)