# Third-party casting support Provide custom playback controls for third-party casting services and other media sources. ## Overview Use the [`AVPlaybackUserInterfaceControllable`](/documentation/AVKit/AVPlaybackUserInterfaceControllable-92fri) protocol suite to build custom transport controls that work with third-party casting services. The [`AVPlaybackUserInterfaceControllable`](/documentation/AVKit/AVPlaybackUserInterfaceControllable-92fri) composite protocol combines playback, timeline, media selection, volume, and metadata capabilities into a single interface. ## Topics ### Complete control interface [`protocol AVPlaybackUserInterfaceControllable`](/documentation/AVKit/AVPlaybackUserInterfaceControllable-92fri) A comprehensive protocol that provides complete media control and information for playback, timeline navigation, audio/subtitle selection, volume control, and metadata access. [`@protocol AVPlaybackUserInterfaceControllable `](/documentation/AVKit/AVPlaybackUserInterfaceControllable-7ti30) A comprehensive protocol that provides complete media control and information for playback, timeline navigation, audio/subtitle selection, volume control, and metadata access. ### Playback control [`protocol AVPlaybackUserInterfacePlaybackControllable`](/documentation/AVKit/AVPlaybackUserInterfacePlaybackControllable-9he54) Provides playback control and state management for media content. [`@protocol AVPlaybackUserInterfacePlaybackControllable `](/documentation/AVKit/AVPlaybackUserInterfacePlaybackControllable-81n66) Provides playback control and state management for media content. [`enum AVPlaybackUserInterfacePlaybackState`](/documentation/AVKit/AVPlaybackUserInterfacePlaybackState) Describes possible transport states of the playback source. [`struct AVPlaybackUserInterfaceSeekCapabilities`](/documentation/AVKit/AVPlaybackUserInterfaceSeekCapabilities) Describes navigation capabilities of the media source. ### Timeline and segments [`protocol AVPlaybackUserInterfaceTimeControllable`](/documentation/AVKit/AVPlaybackUserInterfaceTimeControllable-50vcy) Provides time control and navigation capabilities for media content. [`@protocol AVPlaybackUserInterfaceTimeControllable `](/documentation/AVKit/AVPlaybackUserInterfaceTimeControllable-62fq2) Provides time control and navigation capabilities for media content. [`class AVPlaybackUserInterfacePlaybackPosition`](/documentation/AVKit/AVPlaybackUserInterfacePlaybackPosition) A snapshot comprising a playback position recorded at a known host time and the rate of position advancement. [`class AVPlaybackUserInterfaceTimelineSegment`](/documentation/AVKit/AVPlaybackUserInterfaceTimelineSegment) Represents a contiguous segment of timeline content with specific playback characteristics. [`enum AVPlaybackUserInterfaceTimelineSegmentType`](/documentation/AVKit/AVPlaybackUserInterfaceTimelineSegmentType) Describes the type of content within a timeline segment. ### Media selection [`protocol AVPlaybackUserInterfaceMediaSelectionControllable`](/documentation/AVKit/AVPlaybackUserInterfaceMediaSelectionControllable-8ee5z) Provides audio and subtitle selection capabilities for media content. [`@protocol AVPlaybackUserInterfaceMediaSelectionControllable `](/documentation/AVKit/AVPlaybackUserInterfaceMediaSelectionControllable-2fftn) Provides audio and subtitle selection capabilities for media content. [`class AVPlaybackUserInterfaceMediaSelectionOption`](/documentation/AVKit/AVPlaybackUserInterfaceMediaSelectionOption) Represents a media selection option for audio tracks or subtitle tracks. ### Volume control [`protocol AVPlaybackUserInterfaceVolumeControllable`](/documentation/AVKit/AVPlaybackUserInterfaceVolumeControllable-4vgi1) Provides volume and audio muting control for media content. [`@protocol AVPlaybackUserInterfaceVolumeControllable `](/documentation/AVKit/AVPlaybackUserInterfaceVolumeControllable-5ystg) Provides volume and audio muting control for media content. ### Content metadata [`protocol AVPlaybackUserInterfaceMetadataProviding`](/documentation/AVKit/AVPlaybackUserInterfaceMetadataProviding-814y4) Provides metadata information about media content including title, artwork, and content type. [`@protocol AVPlaybackUserInterfaceMetadataProviding `](/documentation/AVKit/AVPlaybackUserInterfaceMetadataProviding-1w04z) Provides metadata information about media content including title, artwork, and content type. [`struct AVPlaybackUserInterfaceContentMetadata`](/documentation/AVKit/AVPlaybackUserInterfaceContentMetadata-swift.struct) A Swift-friendly structure representing media metadata. [`@interface AVPlaybackUserInterfaceContentMetadata : NSObject`](/documentation/AVKit/AVPlaybackUserInterfaceContentMetadata-c.class) Provides metadata information about media content including title, artwork, and content type. [`@interface AVPlaybackUserInterfaceContentMetadataTemplate : NSObject`](/documentation/AVKit/AVPlaybackUserInterfaceContentMetadataTemplate) A mutable template for configuring media metadata before creating immutable metadata objects. [`class AVPlaybackUserInterfaceContentArtwork`](/documentation/AVKit/AVPlaybackUserInterfaceContentArtwork) Base class representing artwork or cover art for media content. [`class AVPlaybackUserInterfaceContentURLArtwork`](/documentation/AVKit/AVPlaybackUserInterfaceContentURLArtwork) An artwork subclass that references artwork via a URL and content type. [`@interface AVPlaybackUserInterfaceContentVideoProperties : NSObject`](/documentation/AVKit/AVPlaybackUserInterfaceContentVideoProperties) Properties specific to video content. --- 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)