An object that displays compressed or uncompressed video frames.
SDKs
- iOS 8.0+
- macOS 10.8+
- Mac Catalyst 13.0+
- tvOS 10.2+
Framework
- AVFoundation
Declaration
class AVSampleBufferDisplayLayer : CALayer
ClassAVSample
AVSample
Topics
Initiating Media Data Requests
func requestInstructs the target to invoke a client-supplied block repeatedly, at its convenience, in order to gather sample buffers for display.
var isA Boolean value that indicates the readiness of the layer to accept more sample buffers.
func stopCancels any current media data request.
Flushing Sample Buffers
func flush()Instructs the layer to discard any enqueued sample buffers that are pending.
func flushInstructs the layer to discard pending enqueued sample buffers and remove any currently displayed image.
Configuring the Timebase
var controlThe layer's control timebase, which governs how timestamps are interpreted.
Enqueuing the Sample Buffer
func enqueue(CMSampleSends a sample buffer for display.
Setting the Video Gravity
var videoA string defining how the video is displayed within the bounds rect of a sample buffer display layer.
struct AVLayerA value that defines how the video is displayed within a layer’s bounds rectangle.
Getting Display Layer Settings
var status: AVQueuedThe ability of the display layer to be used for enqueuing sample buffers.
enum AVQueuedThe statuses for sample buffer rendering.
Handling Errors
var error: Error?The error that caused the failure.
let AVSampleThe key for the corresponding error.
static let AVSamplePosted when a buffer display layer failed to decode.
Instance Properties
See Also
Media Playback
class AVPlayerAn object that provides the interface to control the player’s transport behavior.
class AVQueueA player used to play a number of items in sequence.
class AVPlayerAn object that manages a player's visual output.
class AVPlayerAn object used to model the timing and presentation state of an asset played by the player.
class AVPlayerAn object used to capture the date range metadata defined for an HTTP Live Streaming asset.
class AVPlayerAn object used to modify the presentation state of an asset track being presented by a player.
class AVSynchronizedAn object used to synchronize with a specific player item.
class AVPlayerAn object that specifies the preferred languages and media characteristics for a player.
class AVSampleAn object used to decompress audio and play compressed or uncompressed audio.
class AVSampleAn object used to synchronize multiple queued sample buffers to a single timeline.
class AVRouteAn object that detects the presences of media playback routes.