CMFormatDescription

Declaration

class CMFormatDescription

Overview

A CMFormatDescription object is an object that describes media types (audio, video, muxed, and so on).

Topics

Inspecting Format Descriptions

• audioFormatList
• audioStreamBasicDescription
• audioChannelLayout
• dimensions
• extensions
• frameDuration
• frameQuanta
• identifiers
• magicCookie
• mediaSubType
• mediaType
• mostCompatibleFormat
• nalUnitHeaderLength
• parameterSets
• richestDecodableFormat
• timeCodeFlags
• tagCollections
• matchesTaggedBufferGroup(_:)

Working with Audio Descriptions

• withMagicCookie(_:)

Working with Video Descriptions

• cleanAperture(originIsAtTopLeft:)
• matchesImageBuffer(_:)
• presentationDimensions(usePixelAspectRatio:useCleanAperture:)

Working with Metadata Descriptions

• keyWithLocalID(_:)

Working with Text Descriptions

• defaultStyle()
• defaultTextBox(originIsAtTopLeft:heightOfTextTrack:)
• displayFlags()
• fontName(localFontID:)
• justification()

Comparing Format Descriptions

• ==(_:_:)
• equalTo(_:equalityMask:)
• equalTo(_:extensionKeysToIgnore:sampleDescriptionExtensionAtomKeysToIgnore:)

Errors

• CMFormatDescription.Error

Constants

• extensionKeysCommonWithImageBuffers
• typeID
• CMFormatDescription.MediaType
• CMFormatDescription.MediaSubType
• CMFormatDescription.TimeCode
• CMFormatDescription.EqualityMask
• CMFormatDescription.Extensions
• CMFormatDescription.ParameterSetCollection

Initializers

• init(referencing:)

Type Aliases

• CMFormatDescription.T

Relationships

Conforms To

• Copyable
• Equatable
• Escapable
• Hashable
• Sendable
• SendableMetatype

See Also

Format Description Types

• CMAudioFormatDescription
• CMClosedCaptionFormatDescription
• CMMetadataFormatDescription
• CMMuxedFormatDescription
• CMTextFormatDescription
• CMTimeCodeFormatDescription
• CMVideoFormatDescription