---
title: AVAssetDownloadTaskMinimumRequiredMediaBitrateKey
framework: avfoundation
role: symbol
role_heading: Global Variable
path: avfoundation/avassetdownloadtaskminimumrequiredmediabitratekey
---

# AVAssetDownloadTaskMinimumRequiredMediaBitrateKey

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

## Declaration

```swift
let AVAssetDownloadTaskMinimumRequiredMediaBitrateKey: String
```

## Discussion

Discussion By default, a download task selects the highest bit rate variant available. To download a variant of a particular size, provide an NSNumber value that indicates the preferred bit rate.

## See Also

### Download option keys

- [AVAssetDownloadTaskMinimumRequiredPresentationSizeKey](avfoundation/avassetdownloadtaskminimumrequiredpresentationsizekey.md)
- [AVAssetDownloadTaskMediaSelectionKey](avfoundation/avassetdownloadtaskmediaselectionkey.md)
- [AVAssetDownloadTaskMediaSelectionPrefersMultichannelKey](avfoundation/avassetdownloadtaskmediaselectionprefersmultichannelkey.md)
- [AVAssetDownloadTaskPrefersHDRKey](avfoundation/avassetdownloadtaskprefershdrkey.md)
- [AVAssetDownloadTaskPrefersLosslessAudioKey](avfoundation/avassetdownloadtaskpreferslosslessaudiokey.md)