AVFoundation macOS 12.0 Beta 3 to Beta 4 API Differences

AVAssetDownloadTask.h

Modified AVAssetDownloadConfiguration

	Protocols
From	NSSecureCoding
To	none

Modified AVAssetDownloadContentConfiguration

	Protocols
From	NSCopying, NSSecureCoding
To	NSCopying

AVAssetReaderOutput.h

Removed -[AVAssetReaderCaptionValidationHandling captionAdaptor:didParseCaption:skippingUnsupportedSourceSyntaxElements:]

AVAssetResourceLoader.h

Modified -[AVAssetResourceLoadingRequest streamingContentKeyRequestDataForApp:contentIdentifier:options:error:]

	Availability	Replacement
From	Available	none
To	Deprecated	-[AVContentKeyRequest makeStreamingContentKeyRequestDataForApp:contentIdentifier:options:completionHandler:]

Modified -[AVAssetResourceLoadingRequest persistentContentKeyFromKeyVendorResponse:options:error:]

	Availability	Replacement
From	Available	none
To	Deprecated	-[AVPersistableContentKeyRequest persistableContentKeyFromKeyVendorResponse:options:error:]

Modified AVAssetResourceLoadingRequestStreamingContentKeyRequestRequiresPersistentKey

	Availability	Replacement
From	Available	none
To	Deprecated	-[AVPersistableContentKeyRequest persistableContentKeyFromKeyVendorResponse:options:error:]

AVAssetVariant.h

Modified AVAssetVariant

	Protocols
From	NSSecureCoding
To	none

Modified AVAssetVariantQualifier

	Protocols
From	NSCopying, NSSecureCoding
To	NSCopying