--- title: CMFormatDescription framework: coremedia role: collectionGroup role_heading: API Collection path: coremedia/cmformatdescription-api --- # CMFormatDescription A media format descriptor that describes the samples in a sample buffer. ## Overview Overview CMFormatDescriptions are immutable Core Foundation objects that describe media data of various types, including audio, video, and muxed media data. There are two types of API: media-type-agnostic APIs (supported by all CMFormatDescriptions) and media-type-specific APIs. The media-type-agnostic APIs are prefixed with CMFormatDescription, and the media-type-specific APIs are prefixed with CMAudioFormatDescription, CMVideoFormatDescription, and so on. ## Topics ### Creating Format Descriptions - [CMFormatDescriptionCreate(allocator:mediaType:mediaSubType:extensions:formatDescriptionOut:)](coremedia/cmformatdescriptioncreate(allocator:mediatype:mediasubtype:extensions:formatdescriptionout:).md) ### Comparing Format Descriptions - [CMFormatDescriptionEqual(_:otherFormatDescription:)](coremedia/cmformatdescriptionequal(_:otherformatdescription:).md) - [CMFormatDescriptionEqualIgnoringExtensionKeys(_:otherFormatDescription:extensionKeysToIgnore:sampleDescriptionExtensionAtomKeysToIgnore:)](coremedia/cmformatdescriptionequalignoringextensionkeys(_:otherformatdescription:extensionkeystoignore:sampledescriptionextensionatomkeystoignore:).md) ### Inspecting Format Descriptions - [CMFormatDescriptionGetMediaType(_:)](coremedia/cmformatdescriptiongetmediatype(_:).md) - [CMFormatDescriptionGetMediaSubType(_:)](coremedia/cmformatdescriptiongetmediasubtype(_:).md) - [CMFormatDescriptionGetExtension(_:extensionKey:)](coremedia/cmformatdescriptiongetextension(_:extensionkey:).md) - [CMFormatDescriptionGetExtensions(_:)](coremedia/cmformatdescriptiongetextensions(_:).md) - [CMFormatDescriptionGetTypeID()](coremedia/cmformatdescriptiongettypeid().md) ### Working with Audio Descriptions - [CMSoundDescriptionFlavor](coremedia/cmsounddescriptionflavor.md) - [CMAudioFormatDescriptionCreateSummary(allocator:formatDescriptionArray:flags:formatDescriptionOut:)](coremedia/cmaudioformatdescriptioncreatesummary(allocator:formatdescriptionarray:flags:formatdescriptionout:).md) - [CMAudioFormatDescriptionCreate(allocator:asbd:layoutSize:layout:magicCookieSize:magicCookie:extensions:formatDescriptionOut:)](coremedia/cmaudioformatdescriptioncreate(allocator:asbd:layoutsize:layout:magiccookiesize:magiccookie:extensions:formatdescriptionout:).md) - [CMAudioFormatDescriptionEqual(_:otherFormatDescription:equalityMask:equalityMaskOut:)](coremedia/cmaudioformatdescriptionequal(_:otherformatdescription:equalitymask:equalitymaskout:).md) - [CMAudioFormatDescriptionGetChannelLayout(_:sizeOut:)](coremedia/cmaudioformatdescriptiongetchannellayout(_:sizeout:).md) - [CMAudioFormatDescriptionGetFormatList(_:sizeOut:)](coremedia/cmaudioformatdescriptiongetformatlist(_:sizeout:).md) - [CMAudioFormatDescriptionGetMagicCookie(_:sizeOut:)](coremedia/cmaudioformatdescriptiongetmagiccookie(_:sizeout:).md) - [CMAudioFormatDescriptionGetMostCompatibleFormat(_:)](coremedia/cmaudioformatdescriptiongetmostcompatibleformat(_:).md) - [CMAudioFormatDescriptionGetRichestDecodableFormat(_:)](coremedia/cmaudioformatdescriptiongetrichestdecodableformat(_:).md) - [CMAudioFormatDescriptionGetStreamBasicDescription(_:)](coremedia/cmaudioformatdescriptiongetstreambasicdescription(_:).md) - [CMDoesBigEndianSoundDescriptionRequireLegacyCBRSampleTableLayout(_:flavor:)](coremedia/cmdoesbigendiansounddescriptionrequirelegacycbrsampletablelayout(_:flavor:).md) - [CMSwapBigEndianSoundDescriptionToHost(_:_:)](coremedia/cmswapbigendiansounddescriptiontohost(_:_:).md) - [CMSwapHostEndianSoundDescriptionToBig(_:_:)](coremedia/cmswaphostendiansounddescriptiontobig(_:_:).md) - [CMAudioFormatDescriptionCreateFromBigEndianSoundDescriptionData(allocator:bigEndianSoundDescriptionData:size:flavor:formatDescriptionOut:)](coremedia/cmaudioformatdescriptioncreatefrombigendiansounddescriptiondata(allocator:bigendiansounddescriptiondata:size:flavor:formatdescriptionout:).md) - [CMAudioFormatDescriptionCreateFromBigEndianSoundDescriptionBlockBuffer(allocator:bigEndianSoundDescriptionBlockBuffer:flavor:formatDescriptionOut:)](coremedia/cmaudioformatdescriptioncreatefrombigendiansounddescriptionblockbuffer(allocator:bigendiansounddescriptionblockbuffer:flavor:formatdescriptionout:).md) - [CMAudioFormatDescriptionCopyAsBigEndianSoundDescriptionBlockBuffer(allocator:audioFormatDescription:flavor:blockBufferOut:)](coremedia/cmaudioformatdescriptioncopyasbigendiansounddescriptionblockbuffer(allocator:audioformatdescription:flavor:blockbufferout:).md) ### Working with Video Descriptions - [CMImageDescriptionFlavor](coremedia/cmimagedescriptionflavor.md) - [CMVideoFormatDescriptionCreate(allocator:codecType:width:height:extensions:formatDescriptionOut:)](coremedia/cmvideoformatdescriptioncreate(allocator:codectype:width:height:extensions:formatdescriptionout:).md) - [CMVideoFormatDescriptionCreateForImageBuffer(allocator:imageBuffer:formatDescriptionOut:)](coremedia/cmvideoformatdescriptioncreateforimagebuffer(allocator:imagebuffer:formatdescriptionout:).md) - [CMVideoFormatDescriptionGetCleanAperture(_:originIsAtTopLeft:)](coremedia/cmvideoformatdescriptiongetcleanaperture(_:originisattopleft:).md) - [CMVideoFormatDescriptionGetDimensions(_:)](coremedia/cmvideoformatdescriptiongetdimensions(_:).md) - [CMVideoFormatDescriptionGetExtensionKeysCommonWithImageBuffers()](coremedia/cmvideoformatdescriptiongetextensionkeyscommonwithimagebuffers().md) - [CMVideoFormatDescriptionGetPresentationDimensions(_:usePixelAspectRatio:useCleanAperture:)](coremedia/cmvideoformatdescriptiongetpresentationdimensions(_:usepixelaspectratio:usecleanaperture:).md) - [CMVideoFormatDescriptionMatchesImageBuffer(_:imageBuffer:)](coremedia/cmvideoformatdescriptionmatchesimagebuffer(_:imagebuffer:).md) - [CMVideoFormatDescriptionCreateFromH264ParameterSets(allocator:parameterSetCount:parameterSetPointers:parameterSetSizes:nalUnitHeaderLength:formatDescriptionOut:)](coremedia/cmvideoformatdescriptioncreatefromh264parametersets(allocator:parametersetcount:parametersetpointers:parametersetsizes:nalunitheaderlength:formatdescriptionout:).md) - [CMVideoFormatDescriptionCreateFromHEVCParameterSets(allocator:parameterSetCount:parameterSetPointers:parameterSetSizes:nalUnitHeaderLength:extensions:formatDescriptionOut:)](coremedia/cmvideoformatdescriptioncreatefromhevcparametersets(allocator:parametersetcount:parametersetpointers:parametersetsizes:nalunitheaderlength:extensions:formatdescriptionout:).md) - [CMVideoFormatDescriptionGetH264ParameterSetAtIndex(_:parameterSetIndex:parameterSetPointerOut:parameterSetSizeOut:parameterSetCountOut:nalUnitHeaderLengthOut:)](coremedia/cmvideoformatdescriptiongeth264parametersetatindex(_:parametersetindex:parametersetpointerout:parametersetsizeout:parametersetcountout:nalunitheaderlengthout:).md) - [CMVideoFormatDescriptionCopyAsBigEndianImageDescriptionBlockBuffer(allocator:videoFormatDescription:stringEncoding:flavor:blockBufferOut:)](coremedia/cmvideoformatdescriptioncopyasbigendianimagedescriptionblockbuffer(allocator:videoformatdescription:stringencoding:flavor:blockbufferout:).md) - [CMVideoFormatDescriptionCreateFromBigEndianImageDescriptionBlockBuffer(allocator:bigEndianImageDescriptionBlockBuffer:stringEncoding:flavor:formatDescriptionOut:)](coremedia/cmvideoformatdescriptioncreatefrombigendianimagedescriptionblockbuffer(allocator:bigendianimagedescriptionblockbuffer:stringencoding:flavor:formatdescriptionout:).md) - [CMVideoFormatDescriptionCreateFromBigEndianImageDescriptionData(allocator:bigEndianImageDescriptionData:size:stringEncoding:flavor:formatDescriptionOut:)](coremedia/cmvideoformatdescriptioncreatefrombigendianimagedescriptiondata(allocator:bigendianimagedescriptiondata:size:stringencoding:flavor:formatdescriptionout:).md) - [CMSwapBigEndianImageDescriptionToHost(_:_:)](coremedia/cmswapbigendianimagedescriptiontohost(_:_:).md) - [CMSwapHostEndianImageDescriptionToBig(_:_:)](coremedia/cmswaphostendianimagedescriptiontobig(_:_:).md) ### Working with Muxed Descriptions - [CMMuxedFormatDescriptionCreate(allocator:muxType:extensions:formatDescriptionOut:)](coremedia/cmmuxedformatdescriptioncreate(allocator:muxtype:extensions:formatdescriptionout:).md) ### Working with Metadata Descriptions - [CMMetadataDescriptionFlavor](coremedia/cmmetadatadescriptionflavor.md) - [CMMetadataFormatDescriptionCreateWithKeys(allocator:metadataType:keys:formatDescriptionOut:)](coremedia/cmmetadataformatdescriptioncreatewithkeys(allocator:metadatatype:keys:formatdescriptionout:).md) - [CMMetadataFormatDescriptionGetKeyWithLocalID(_:localKeyID:)](coremedia/cmmetadataformatdescriptiongetkeywithlocalid(_:localkeyid:).md) - [CMMetadataFormatDescriptionCopyAsBigEndianMetadataDescriptionBlockBuffer(allocator:metadataFormatDescription:flavor:blockBufferOut:)](coremedia/cmmetadataformatdescriptioncopyasbigendianmetadatadescriptionblockbuffer(allocator:metadataformatdescription:flavor:blockbufferout:).md) - [CMMetadataFormatDescriptionCreateByMergingMetadataFormatDescriptions(allocator:sourceDescription:otherSourceDescription:formatDescriptionOut:)](coremedia/cmmetadataformatdescriptioncreatebymergingmetadataformatdescriptions(allocator:sourcedescription:othersourcedescription:formatdescriptionout:).md) - [CMMetadataFormatDescriptionCreateFromBigEndianMetadataDescriptionBlockBuffer(allocator:bigEndianMetadataDescriptionBlockBuffer:flavor:formatDescriptionOut:)](coremedia/cmmetadataformatdescriptioncreatefrombigendianmetadatadescriptionblockbuffer(allocator:bigendianmetadatadescriptionblockbuffer:flavor:formatdescriptionout:).md) - [CMMetadataFormatDescriptionCreateFromBigEndianMetadataDescriptionData(allocator:bigEndianMetadataDescriptionData:size:flavor:formatDescriptionOut:)](coremedia/cmmetadataformatdescriptioncreatefrombigendianmetadatadescriptiondata(allocator:bigendianmetadatadescriptiondata:size:flavor:formatdescriptionout:).md) - [CMMetadataFormatDescriptionCreateWithMetadataFormatDescriptionAndMetadataSpecifications(allocator:sourceDescription:metadataSpecifications:formatDescriptionOut:)](coremedia/cmmetadataformatdescriptioncreatewithmetadataformatdescriptionandmetadataspecifications(allocator:sourcedescription:metadataspecifications:formatdescriptionout:).md) - [CMMetadataFormatDescriptionCreateWithMetadataSpecifications(allocator:metadataType:metadataSpecifications:formatDescriptionOut:)](coremedia/cmmetadataformatdescriptioncreatewithmetadataspecifications(allocator:metadatatype:metadataspecifications:formatdescriptionout:).md) - [CMSwapBigEndianMetadataDescriptionToHost(_:_:)](coremedia/cmswapbigendianmetadatadescriptiontohost(_:_:).md) - [CMSwapHostEndianMetadataDescriptionToBig(_:_:)](coremedia/cmswaphostendianmetadatadescriptiontobig(_:_:).md) - [CMMetadataFormatDescriptionGetIdentifiers(_:)](coremedia/cmmetadataformatdescriptiongetidentifiers(_:).md) ### Working with Text Descriptions - [CMTextDescriptionFlavor](coremedia/cmtextdescriptionflavor.md) - [CMTextFormatDescriptionGetDefaultStyle(_:localFontIDOut:boldOut:italicOut:underlineOut:fontSizeOut:colorComponentsOut:)](coremedia/cmtextformatdescriptiongetdefaultstyle(_:localfontidout:boldout:italicout:underlineout:fontsizeout:colorcomponentsout:).md) - [CMTextFormatDescriptionGetDefaultTextBox(_:originIsAtTopLeft:heightOfTextTrack:defaultTextBoxOut:)](coremedia/cmtextformatdescriptiongetdefaulttextbox(_:originisattopleft:heightoftexttrack:defaulttextboxout:).md) - [CMTextFormatDescriptionGetDisplayFlags(_:displayFlagsOut:)](coremedia/cmtextformatdescriptiongetdisplayflags(_:displayflagsout:).md) - [CMTextFormatDescriptionGetFontName(_:localFontID:fontNameOut:)](coremedia/cmtextformatdescriptiongetfontname(_:localfontid:fontnameout:).md) - [CMTextFormatDescriptionGetJustification(_:horizontalOut:verticalOut:)](coremedia/cmtextformatdescriptiongetjustification(_:horizontalout:verticalout:).md) - [CMTextFormatDescriptionCopyAsBigEndianTextDescriptionBlockBuffer(allocator:textFormatDescription:flavor:blockBufferOut:)](coremedia/cmtextformatdescriptioncopyasbigendiantextdescriptionblockbuffer(allocator:textformatdescription:flavor:blockbufferout:).md) - [CMTextFormatDescriptionCreateFromBigEndianTextDescriptionBlockBuffer(allocator:bigEndianTextDescriptionBlockBuffer:flavor:mediaType:formatDescriptionOut:)](coremedia/cmtextformatdescriptioncreatefrombigendiantextdescriptionblockbuffer(allocator:bigendiantextdescriptionblockbuffer:flavor:mediatype:formatdescriptionout:).md) - [CMTextFormatDescriptionCreateFromBigEndianTextDescriptionData(allocator:bigEndianTextDescriptionData:size:flavor:mediaType:formatDescriptionOut:)](coremedia/cmtextformatdescriptioncreatefrombigendiantextdescriptiondata(allocator:bigendiantextdescriptiondata:size:flavor:mediatype:formatdescriptionout:).md) - [CMSwapBigEndianTextDescriptionToHost(_:_:)](coremedia/cmswapbigendiantextdescriptiontohost(_:_:).md) - [CMSwapHostEndianTextDescriptionToBig(_:_:)](coremedia/cmswaphostendiantextdescriptiontobig(_:_:).md) ### Working with Time Code Descriptions - [CMTimeCodeDescriptionFlavor](coremedia/cmtimecodedescriptionflavor.md) - [CMTimeCodeFormatDescriptionCreate(allocator:timeCodeFormatType:frameDuration:frameQuanta:flags:extensions:formatDescriptionOut:)](coremedia/cmtimecodeformatdescriptioncreate(allocator:timecodeformattype:frameduration:framequanta:flags:extensions:formatdescriptionout:).md) - [CMTimeCodeFormatDescriptionGetFrameDuration(_:)](coremedia/cmtimecodeformatdescriptiongetframeduration(_:).md) - [CMTimeCodeFormatDescriptionGetFrameQuanta(_:)](coremedia/cmtimecodeformatdescriptiongetframequanta(_:).md) - [CMTimeCodeFormatDescriptionGetTimeCodeFlags(_:)](coremedia/cmtimecodeformatdescriptiongettimecodeflags(_:).md) - [CMTimeCodeFormatDescriptionCopyAsBigEndianTimeCodeDescriptionBlockBuffer(allocator:timeCodeFormatDescription:flavor:blockBufferOut:)](coremedia/cmtimecodeformatdescriptioncopyasbigendiantimecodedescriptionblockbuffer(allocator:timecodeformatdescription:flavor:blockbufferout:).md) - [CMTimeCodeFormatDescriptionCreateFromBigEndianTimeCodeDescriptionBlockBuffer(allocator:bigEndianTimeCodeDescriptionBlockBuffer:flavor:formatDescriptionOut:)](coremedia/cmtimecodeformatdescriptioncreatefrombigendiantimecodedescriptionblockbuffer(allocator:bigendiantimecodedescriptionblockbuffer:flavor:formatdescriptionout:).md) - [CMTimeCodeFormatDescriptionCreateFromBigEndianTimeCodeDescriptionData(allocator:bigEndianTimeCodeDescriptionData:size:flavor:formatDescriptionOut:)](coremedia/cmtimecodeformatdescriptioncreatefrombigendiantimecodedescriptiondata(allocator:bigendiantimecodedescriptiondata:size:flavor:formatdescriptionout:).md) - [CMSwapBigEndianTimeCodeDescriptionToHost(_:_:)](coremedia/cmswapbigendiantimecodedescriptiontohost(_:_:).md) - [CMSwapHostEndianTimeCodeDescriptionToBig(_:_:)](coremedia/cmswaphostendiantimecodedescriptiontobig(_:_:).md) ### Working with Closed Captioning Descriptions - [CMClosedCaptionDescriptionFlavor](coremedia/cmclosedcaptiondescriptionflavor.md) - [CMClosedCaptionFormatDescriptionCopyAsBigEndianClosedCaptionDescriptionBlockBuffer(allocator:closedCaptionFormatDescription:flavor:blockBufferOut:)](coremedia/cmclosedcaptionformatdescriptioncopyasbigendianclosedcaptiondescriptionblockbuffer(allocator:closedcaptionformatdescription:flavor:blockbufferout:).md) - [CMClosedCaptionFormatDescriptionCreateFromBigEndianClosedCaptionDescriptionBlockBuffer(allocator:bigEndianClosedCaptionDescriptionBlockBuffer:flavor:formatDescriptionOut:)](coremedia/cmclosedcaptionformatdescriptioncreatefrombigendianclosedcaptiondescriptionblockbuffer(allocator:bigendianclosedcaptiondescriptionblockbuffer:flavor:formatdescriptionout:).md) - [CMClosedCaptionFormatDescriptionCreateFromBigEndianClosedCaptionDescriptionData(allocator:bigEndianClosedCaptionDescriptionData:size:flavor:formatDescriptionOut:)](coremedia/cmclosedcaptionformatdescriptioncreatefrombigendianclosedcaptiondescriptiondata(allocator:bigendianclosedcaptiondescriptiondata:size:flavor:formatdescriptionout:).md) - [CMSwapHostEndianClosedCaptionDescriptionToBig(_:_:)](coremedia/cmswaphostendianclosedcaptiondescriptiontobig(_:_:).md) - [CMSwapBigEndianClosedCaptionDescriptionToHost(_:_:)](coremedia/cmswapbigendianclosedcaptiondescriptiontohost(_:_:).md) ### Format Description Types - [CMFormatDescription](coremedia/cmformatdescription.md) - [CMAudioFormatDescription](coremedia/cmaudioformatdescription.md) - [CMClosedCaptionFormatDescription](coremedia/cmclosedcaptionformatdescription.md) - [CMMetadataFormatDescription](coremedia/cmmetadataformatdescription.md) - [CMMuxedFormatDescription](coremedia/cmmuxedformatdescription.md) - [CMTextFormatDescription](coremedia/cmtextformatdescription.md) - [CMTimeCodeFormatDescription](coremedia/cmtimecodeformatdescription.md) - [CMVideoFormatDescription](coremedia/cmvideoformatdescription.md) ### Format Description Extension Keys - [kCMFormatDescriptionExtension_ContentColorVolume](coremedia/kcmformatdescriptionextension_contentcolorvolume.md) - [kCMFormatDescriptionExtension_HasAdditionalViews](coremedia/kcmformatdescriptionextension_hasadditionalviews.md) - [kCMFormatDescriptionExtension_HasLeftStereoEyeView](coremedia/kcmformatdescriptionextension_hasleftstereoeyeview.md) - [kCMFormatDescriptionExtension_HasRightStereoEyeView](coremedia/kcmformatdescriptionextension_hasrightstereoeyeview.md) - [kCMFormatDescriptionExtension_HeroEye](coremedia/kcmformatdescriptionextension_heroeye.md) - [kCMFormatDescriptionExtension_HorizontalDisparityAdjustment](coremedia/kcmformatdescriptionextension_horizontaldisparityadjustment.md) - [kCMFormatDescriptionExtension_LogTransferFunction](coremedia/kcmformatdescriptionextension_logtransferfunction.md) - [kCMFormatDescriptionExtension_StereoCameraBaseline](coremedia/kcmformatdescriptionextension_stereocamerabaseline.md) - [kCMFormatDescriptionHeroEye_Left](coremedia/kcmformatdescriptionheroeye_left.md) - [kCMFormatDescriptionHeroEye_Right](coremedia/kcmformatdescriptionheroeye_right.md) ### Format Types - [CMClosedCaptionFormatType](coremedia/cmclosedcaptionformattype.md) - [CMMetadataFormatType](coremedia/cmmetadataformattype.md) - [Metadata Format Types](coremedia/metadata-format-types.md) - [CMSubtitleFormatType](coremedia/cmsubtitleformattype.md) - [Subtitle Format Types](coremedia/subtitle-format-types.md) - [CMTimeCodeFormatType](coremedia/cmtimecodeformattype.md) - [Time Code Formats](coremedia/time-code-formats.md) - [CMTextFormatType](coremedia/cmtextformattype.md) - [CMPixelFormatType](coremedia/cmpixelformattype.md) - [Tagged Buffer Group Format Types](coremedia/tagged-buffergroup-format-types.md) ### Data Types - [CMVideoDimensions](coremedia/cmvideodimensions.md) - [CMAudioFormatDescriptionMask](coremedia/cmaudioformatdescriptionmask.md) - [CMMediaType](coremedia/cmmediatype.md) - [CMAudioCodecType](coremedia/cmaudiocodectype.md) - [CMVideoCodecType](coremedia/cmvideocodectype.md) - [CMTextDisplayFlags](coremedia/cmtextdisplayflags.md) - [CMTextJustificationValue](coremedia/cmtextjustificationvalue.md) - [Media Type Constants](coremedia/media-type-constants.md) - [Muxed Stream Types](coremedia/muxed-stream-types.md) - [Audio Codec Types](coremedia/audio-codec-types.md) ### Constants - [Audio Format Description Mask Codes](coremedia/audio-format-desc-codes.md) - [Chroma Location Extension Constants](coremedia/chroma-location-extension-constants.md) - [Clean Aperture Extension Constants](coremedia/clean-aperture-extension-constants.md) - [Closed Caption Format Type Constants](coremedia/closed-caption-formats.md) - [Color Primary Extension Constants](coremedia/color-primary-extension-constants.md) - [Field Detail Extension Constants](coremedia/field-detail-extension-constants.md) - [Format Description Bridge Error Codes](coremedia/format-description-bridge-errors.md) - [Format Description Constants](coremedia/format-description-constants.md) - [Format Description Error Codes](coremedia/format-description-errors.md) - [HEVC Temporal Level Info Constants](coremedia/hevc-temporal-level-info-constants.md) - [Metadata Format Description Constants](coremedia/metadata-format-description-constants.md) - [MPEG-2-conformant Formats](coremedia/mpeg-2-conformant-formats.md) - [Pixel Aspect Ratio Extension Constants](coremedia/pixel-aspect-ratio-extension-constants.md) - [Text Display Flags](coremedia/text-display-flags.md) - [Text Format Constants](coremedia/text-format-constants.md) - [Text Format Description Constants](coremedia/text-format-description-constants.md) - [Text Justification Constants](coremedia/text-justification-constants.md) - [Time Code Flags](coremedia/time-code-flags.md) - [Time Code Format Description Constants](coremedia/time-code-format-description-constants.md) - [Transfer Function Extension Constants](coremedia/transfer-function-extension-constants.md) - [Video Codec Constants](coremedia/video-codec-constants.md) - [Video Pixel Formats](coremedia/video-pixel-formats.md) - [Video Profile Constants](coremedia/video-profile-constants.md) - [YCbCrMatrix Extension Constants](coremedia/ycbcrmatrix-extension-constants.md) ## See Also ### Sample Processing - [CMSampleBuffer](coremedia/cmsamplebuffer-api.md) - [CMBlockBuffer](coremedia/cmblockbuffer-api.md) - [CMTaggedBufferGroup](coremedia/cmtaggedbuffergroup.md) - [CMAttachment](coremedia/cmattachment-api.md) - [CMTaggedBuffer](coremedia/cmtaggedbuffer.md) - [CMMutableDataBlockBuffer](coremedia/cmmutabledatablockbuffer.md) - [CMReadOnlyDataBlockBuffer](coremedia/cmreadonlydatablockbuffer.md) - [CMReadySampleBuffer](coremedia/cmreadysamplebuffer.md) - [CMSampleDataReference](coremedia/cmsampledatareference.md) - [CMTaggedDynamicBuffer](coremedia/cmtaggeddynamicbuffer.md)