Class

AVCaptureVideoDataOutput

A capture output that records video and provides access to video frames for processing.

Declaration

class AVCaptureVideoDataOutput : AVCaptureOutput

Overview

You use this output to process compressed or uncompressed frames from the captured video. You can access the frames with the captureOutput(_:didOutput:from:) delegate method.

Topics

Configuring Video Capture

var videoSettings: [String : Any]!

The compression settings for the output.

Video Settings Dictionaries

Define output image and video formats by using the key and value constants.

var alwaysDiscardsLateVideoFrames: Bool

Indicates whether to drop video frames if they arrive late.

var automaticallyConfiguresOutputBufferDimensions: Bool

A Boolean value that indicates whether the output automatically configures the size of output buffers.

Beta
var deliversPreviewSizedOutputBuffers: Bool

A Boolean value that indicates whether the output is configured to deliver preview-sized buffers.

Beta
func recommendedVideoSettings(forVideoCodecType: AVVideoCodecType, assetWriterOutputFileType: AVFileType) -> [AnyHashable : Any]?

Returns a video settings dictionary appropriate for capturing video to be recorded to a file with the specified codec and type.

func recommendedVideoSettingsForAssetWriter(writingTo: AVFileType) -> [String : Any]?

Specifies the recommended settings for use with an AVAssetWriterInput.

Retrieving Supported Video Types

var availableVideoCodecTypes: [AVVideoCodecType]

Indicates the supported video codec formats that can be specified in videoSettings.

struct AVVideoCodecType

A set of constants used to describe codecs for video capture.

Receiving Captured Video Data

func setSampleBufferDelegate(AVCaptureVideoDataOutputSampleBufferDelegate?, queue: DispatchQueue?)

Sets the sample buffer delegate and the queue on which callbacks should be invoked.

var sampleBufferCallbackQueue: DispatchQueue?

The queue on which delegate callbacks should be invoked

protocol AVCaptureVideoDataOutputSampleBufferDelegate

Methods for receiving sample buffers from and monitoring the status of a video data output.

Creating Video Capture Output

init()

Creates a new video file output.

Relationships

Inherits From

Conforms To

See Also

Movie and Video Capture

Capturing Video in Alternative Formats

Change the format used for capturing movie files.

class AVCaptureMovieFileOutput

A capture output that records video and audio to a QuickTime movie file.

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

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