# requestExportSession(forVideo:options:exportPreset:resultHandler:) Requests an export session for writing the video asset’s data to a file, to be loaded asynchronously. ``` func requestExportSession(forVideo asset: PHAsset, options: PHVideoRequestOptions?, exportPreset: String, resultHandler: @escaping (AVAssetExportSession?, [AnyHashable : Any]?) -> Void) -> PHImageRequestID ``` ## Parameters `asset` The video asset for which an export session is to be created. `options` Options specifying how Photos should handle the request and notify your app of progress or errors. For details, see [`PHVideoRequestOptions`](/documentation/Photos/PHVideoRequestOptions). `exportPreset` The export preset name for exporting the asset. For available presets, see . `resultHandler` A block that Photos calls after loading the asset’s data and preparing the export session. The block takes the following parameters: - exportSession: An object that you can use for writing the video asset’s data to a file. - info: A dictionary that provides information about the status of the request. See for possible keys and values. ## Return Value A numeric identifier for the request. If you need to cancel the request before it completes, pass this identifier to the [`cancelImageRequest(_:)`](/documentation/Photos/PHImageManager/cancelImageRequest(_:)) method. ## Discussion When you call this method, Photos downloads the video data (if necessary) and creates an export session. It then calls your `resultHandler` block to provide the requested video. For additional export options, use the [`requestAVAsset(forVideo:options:resultHandler:)`](/documentation/Photos/PHImageManager/requestAVAsset(forVideo:options:resultHandler:)) method and then create and objects to transcode and output the video asset’s data. --- 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)