---
title: "init(assetWriterInput:)"
framework: avfoundation
role: symbol
role_heading: Initializer
path: "avfoundation/avassetwriterinputcaptionadaptor/init(assetwriterinput:)"
---

# init(assetWriterInput:)

Creates a new caption adaptor that writes to the specified asset writer input.

## Declaration

```swift
init(assetWriterInput input: AVAssetWriterInput)
```

## Parameters

- `input`: The asset writer input.