<!--
{
  "availability" : [
    "iOS: 8.0.0 -",
    "iPadOS: 8.0.0 -",
    "macCatalyst: 13.1.0 -",
    "macOS: 10.10.0 -",
    "tvOS: 9.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 6.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "CoreMedia",
  "identifier" : "/documentation/CoreMedia/CMSampleBufferSetInvalidateHandler(_:invalidateHandler:)",
  "metadataVersion" : "0.1.0",
  "role" : "Function",
  "symbol" : {
    "kind" : "Function",
    "modules" : [
      "Core Media"
    ],
    "preciseIdentifier" : "c:@F@CMSampleBufferSetInvalidateHandler"
  },
  "title" : "CMSampleBufferSetInvalidateHandler(_:invalidateHandler:)"
}
-->

# CMSampleBufferSetInvalidateHandler(_:invalidateHandler:)

Sets the sample buffer’s invalidation handler.

```
func CMSampleBufferSetInvalidateHandler(_ sbuf: CMSampleBuffer, invalidateHandler: @escaping CMSampleBufferInvalidateHandler) -> OSStatus
```

## Parameters

`sbuf`

The `CMSampleBuffer` being modified.

`invalidateHandler`

Block to be called during `CMSampleBufferInvalidate`.

## Discussion

A sample buffer can only have one invalidation callback. The invalidation callback isn’t called during ordinary sample buffer finalization.

## Topics

### Handlers

[`CMSampleBufferInvalidateHandler`](/documentation/CoreMedia/CMSampleBufferInvalidateHandler)

Client callback called by [`CMSampleBufferInvalidate(_:)`](/documentation/CoreMedia/CMSampleBufferInvalidate(_:)).


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)