---
title: formatDescriptionDidChangeNotification
framework: avfoundation
role: symbol
role_heading: Type Property
path: avfoundation/avcaptureinput/port/formatdescriptiondidchangenotification
---

# formatDescriptionDidChangeNotification

A notification the system posts when the capture input port’s format description changes.

## Declaration

```swift
class let formatDescriptionDidChangeNotification: NSNotification.Name
```

## Discussion

Discussion The notification’s object property contains the AVCaptureInput.Port object whose format changed.