---
title: CVAttachmentMode.shouldPropagate
framework: corevideo
role: symbol
role_heading: Case
path: corevideo/cvattachmentmode/shouldpropagate
---

# CVAttachmentMode.shouldPropagate

Indicates to copy the attachment.

## Declaration

```swift
case shouldPropagate
```

## Discussion

Discussion The CVBufferPropagateAttachments(_:_:) function propagates all attachments that have this attachment mode. For example, in most cases, you’ll want to propagate an attachment bearing a timestamp to each successive buffer.

## See Also

### Constants

- [CVAttachmentMode.shouldNotPropagate](corevideo/cvattachmentmode/shouldnotpropagate.md)