---
title: AVURLAssetOverrideMIMETypeKey
framework: avfoundation
role: symbol
role_heading: Global Variable
path: avfoundation/avurlassetoverridemimetypekey
---

# AVURLAssetOverrideMIMETypeKey

A key that specifies the MIME type to use to identify the format of a media resource.

## Declaration

```swift
let AVURLAssetOverrideMIMETypeKey: String
```

## Discussion

Discussion If you specify a value for this key, the system uses it to determine how to handle or parse the media resource, and ignores any other information that may be available, such as the URL path extension or a server-provided MIME type.

## See Also

### Options

- [AVURLAssetAllowsCellularAccessKey](avfoundation/avurlassetallowscellularaccesskey.md)
- [AVURLAssetAllowsConstrainedNetworkAccessKey](avfoundation/avurlassetallowsconstrainednetworkaccesskey.md)
- [AVURLAssetAllowsExpensiveNetworkAccessKey](avfoundation/avurlassetallowsexpensivenetworkaccesskey.md)
- [AVURLAssetHTTPCookiesKey](avfoundation/avurlassethttpcookieskey.md)
- [AVURLAssetHTTPUserAgentKey](avfoundation/avurlassethttpuseragentkey.md)
- [AVURLAssetPreferPreciseDurationAndTimingKey](avfoundation/avurlassetpreferprecisedurationandtimingkey.md)
- [AVURLAssetPrimarySessionIdentifierKey](avfoundation/avurlassetprimarysessionidentifierkey.md)
- [AVURLAssetReferenceRestrictionsKey](avfoundation/avurlassetreferencerestrictionskey.md)
- [AVURLAssetShouldSupportAliasDataReferencesKey](avfoundation/avurlassetshouldsupportaliasdatareferenceskey.md)
- [AVURLAssetURLRequestAttributionKey](avfoundation/avurlasseturlrequestattributionkey.md)
- [AVURLAssetShouldParseExternalSphericalTagsKey](avfoundation/avurlassetshouldparseexternalsphericaltagskey.md)