# AVCapturePhotoFileDataRepresentationCustomizer A protocol that defines the methods to implement to customize the packaging of photo data. ``` protocol AVCapturePhotoFileDataRepresentationCustomizer : NSObjectProtocol ``` ## Overview AVCapturePhoto is a wrapper representing a photo in a file container. To flatten the photo to an object to write to file, call [`fileDataRepresentation()`](/documentation/AVFoundation/AVCapturePhoto/fileDataRepresentation()). For more complex flattening operations such as replacing or stripping metadata, call [`fileDataRepresentation(with:)`](/documentation/AVFoundation/AVCapturePhoto/fileDataRepresentation(with:)) and provide a delegate for customized replacement or stripping behavior. This delegate’s methods are called synchronously before the flattening process begins. ## Topics ### Replacing or removing metadata [`func replacementMetadata(for: AVCapturePhoto) -> [String : Any]?`](/documentation/AVFoundation/AVCapturePhotoFileDataRepresentationCustomizer/replacementMetadata(for:)) A callback in which you can provide replacement metadata or direct [`AVCapturePhoto`](/documentation/AVFoundation/AVCapturePhoto) to strip existing metadata from the flattened file. [`func replacementEmbeddedThumbnailPixelBuffer(withPhotoFormat: AutoreleasingUnsafeMutablePointer, for: AVCapturePhoto) -> Unmanaged?`](/documentation/AVFoundation/AVCapturePhotoFileDataRepresentationCustomizer/replacementEmbeddedThumbnailPixelBuffer(withPhotoFormat:for:)) A callback in which you can provide a replacement embedded thumbnail image with compression settings, or strip the existing embedded thumbnail image from the flattened file. [`func replacementDepthData(for: AVCapturePhoto) -> AVDepthData?`](/documentation/AVFoundation/AVCapturePhotoFileDataRepresentationCustomizer/replacementDepthData(for:)) A callback in which you can provide replacement depth data or strip existing depth data from the file. [`func replacementPortraitEffectsMatte(for: AVCapturePhoto) -> AVPortraitEffectsMatte?`](/documentation/AVFoundation/AVCapturePhotoFileDataRepresentationCustomizer/replacementPortraitEffectsMatte(for:)) A callback in which you can provide a replacement portrait effects matte, or strip the existing portrait effects matte from the file. [`func replacementSemanticSegmentationMatte(ofType: AVSemanticSegmentationMatte.MatteType, for: AVCapturePhoto) -> AVSemanticSegmentationMatte?`](/documentation/AVFoundation/AVCapturePhotoFileDataRepresentationCustomizer/replacementSemanticSegmentationMatte(ofType:for:)) Replaces or removes the semantic segmentation matte of the specified type from the flattened file data representation. [`func replacementAppleProRAWCompressionSettings(for: AVCapturePhoto, defaultSettings: [String : Any], maximumBitDepth: Int) -> [String : Any]`](/documentation/AVFoundation/AVCapturePhotoFileDataRepresentationCustomizer/replacementAppleProRAWCompressionSettings(for:defaultSettings:maximumBitDepth:)) Replaces the compression settings the system uses when writing Apple ProRAW data to a Linear DNG file. ## Relationships ### Inherits From [`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol) --- Copyright © 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)