<!--
{
  "availability" : [
    "macOS: 14.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "MediaExtension",
  "identifier" : "/documentation/MediaExtension/MEFormatReader/parseAdditionalFragments(completionHandler:)",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "MediaExtension"
    ],
    "preciseIdentifier" : "c:objc(pl)MEFormatReader(im)parseAdditionalFragmentsWithCompletionHandler:"
  },
  "title" : "parseAdditionalFragments(completionHandler:)"
}
-->

# parseAdditionalFragments(completionHandler:)

Incorporates additional fragments that the file received after the last time the format reader parsed it.

```
optional func parseAdditionalFragments(completionHandler: @escaping @Sendable (MEFormatReaderParseAdditionalFragmentsStatus, (any Error)?) -> Void)
```

## Parameters

`completionHandler`

The completion block to execute when the parse operation finishes.

## Discussion

This method additional fragments of the media asset if they exist. Media asset formats that don’t support incremental fragments don’t need implement this method. Create the [`MEFormatReader`](/documentation/MediaExtension/MEFormatReader) object with the [`MEFormatReaderInstantiationOptions`](/documentation/MediaExtension/MEFormatReaderInstantiationOptions) property [`allowIncrementalFragmentParsing`](/documentation/MediaExtension/MEFormatReaderInstantiationOptions/allowIncrementalFragmentParsing) set to <doc://com.apple.documentation/documentation/Swift/true>. This method does nothing if the value for [`MEFileInfo.FragmentsStatus`](/documentation/MediaExtension/MEFileInfo/FragmentsStatus-swift.enum) is [`MEFileInfo.FragmentsStatus.containsFragments`](/documentation/MediaExtension/MEFileInfo/FragmentsStatus-swift.enum/containsFragments). Once this method returns an error, additional calls fail.

---

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)