<!--
{
  "availability" : [
    "iOS: 18.0.0 -",
    "iPadOS: 18.0.0 -",
    "macCatalyst: 15.0.0 -",
    "macOS: 12.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "AVFoundation",
  "identifier" : "/documentation/AVFoundation/AVAssetReaderCaptionValidationHandling",
  "metadataVersion" : "0.1.0",
  "role" : "Protocol",
  "symbol" : {
    "kind" : "Protocol",
    "modules" : [
      "AVFoundation"
    ],
    "preciseIdentifier" : "c:objc(pl)AVAssetReaderCaptionValidationHandling"
  },
  "title" : "AVAssetReaderCaptionValidationHandling"
}
-->

# AVAssetReaderCaptionValidationHandling

A protocol that defines the methods for caption validation events.

```
protocol AVAssetReaderCaptionValidationHandling : NSObjectProtocol
```

## Topics

### Validating captions

[`captionAdaptor(_:didVendCaption:skippingUnsupportedSourceSyntaxElements:)`](/documentation/AVFoundation/AVAssetReaderCaptionValidationHandling/captionAdaptor(_:didVendCaption:skippingUnsupportedSourceSyntaxElements:))

Tells the delegate that the adaptor ignored one or more syntax elements when it created the caption object.


---

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)