---
title: "init(size:timing:attachments:)"
framework: coremedia
role: symbol
role_heading: Initializer
path: "coremedia/cmsamplebuffer/sampleproperties/init(size:timing:attachments:)"
---

# init(size:timing:attachments:)

## Declaration

```swift
init(size: Int? = nil, timing: CMSampleTimingInfo, attachments: CMSampleBuffer.SampleAttachments = .init())
```