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# aggregateAssetDownloadTask(with:mediaSelections:assetTitle:assetArtworkData:options:)

Creates a download task to download the asset and media selections.

```
func aggregateAssetDownloadTask(with URLAsset: AVURLAsset, mediaSelections: [AVMediaSelection], assetTitle title: String, assetArtworkData artworkData: Data?, options: [String : Any]? = nil) -> AVAggregateAssetDownloadTask?
```

## Parameters

`URLAsset`

The asset to download to the local device.

`mediaSelections`

An array of media selections to download.

`title`

A human readable title for this asset in the user’s preferred language. The system displays this value in the usage pane of the Settings app.

`artworkData`

Optional artwork data for this asset. The system displays the image in the usage pane of the Settings app.

`options`

Configures custom behavior on the download task.

## Return Value

An aggregate asset download task.

## Discussion

This method may return `nil` if you call it on an invalidated session.

## Topics

### Download option keys

[`AVAssetDownloadTaskMinimumRequiredMediaBitrateKey`](/documentation/AVFoundation/AVAssetDownloadTaskMinimumRequiredMediaBitrateKey)

A key that indicates the minimum bit rate of the variant to download.

[`AVAssetDownloadTaskMinimumRequiredPresentationSizeKey`](/documentation/AVFoundation/AVAssetDownloadTaskMinimumRequiredPresentationSizeKey)

A key that indicates the minimum presentation size of the variant to download.

[`AVAssetDownloadTaskMediaSelectionKey`](/documentation/AVFoundation/AVAssetDownloadTaskMediaSelectionKey)

A key that indicates which media selection to download.

[`AVAssetDownloadTaskMediaSelectionPrefersMultichannelKey`](/documentation/AVFoundation/AVAssetDownloadTaskMediaSelectionPrefersMultichannelKey)

A key that indicates whether the task downloads media selections with support for multichannel playback, when available.

[`AVAssetDownloadTaskPrefersHDRKey`](/documentation/AVFoundation/AVAssetDownloadTaskPrefersHDRKey)

A key that indicates whether the task downloads HDR instead of SDR video, when available.

[`AVAssetDownloadTaskPrefersLosslessAudioKey`](/documentation/AVFoundation/AVAssetDownloadTaskPrefersLosslessAudioKey)

A key that indicates whether the task downloads media selections in lossless audio format, when available.


---

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