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# CVBuffer Attribute Keys

The attributes associated with Core Video buffers.

## Discussion

These attributes let you set multiple attachments at the time of buffer creation, rather than having to call [`CVBufferSetAttachment(_:_:_:_:)`](/documentation/CoreVideo/CVBufferSetAttachment(_:_:_:_:)) for each attachment.

## Topics

### Constants

[`let kCVBufferPropagatedAttachmentsKey: CFString`](/documentation/CoreVideo/kCVBufferPropagatedAttachmentsKey)

Attachments that should be copied when using the [`CVBufferPropagateAttachments(_:_:)`](/documentation/CoreVideo/CVBufferPropagateAttachments(_:_:)) function (type `CFDictionary`, containing a list of attachments as key-value pairs).

[`let kCVBufferNonPropagatedAttachmentsKey: CFString`](/documentation/CoreVideo/kCVBufferNonPropagatedAttachmentsKey)

Attachments that should not be copied when using the [`CVBufferPropagateAttachments(_:_:)`](/documentation/CoreVideo/CVBufferPropagateAttachments(_:_:)) function (type `CFDictionary`, containing a list of attachments as key-value pairs).


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