Function

CMVideoFormatDescriptionCreateFromBigEndianImageDescriptionBlockBuffer

Creates a CMVideoFormatDescription from a big-endian ImageDescription data structure in a CMBlockBuffer.

Declaration

OSStatus CMVideoFormatDescriptionCreateFromBigEndianImageDescriptionBlockBuffer(CFAllocatorRef allocator, CMBlockBufferRef imageDescriptionBlockBuffer, CFStringEncoding stringEncoding, CMImageDescriptionFlavor flavor, CMVideoFormatDescriptionRef  _Nullable *formatDescriptionOut);

Parameters

allocator

Allocator to use for allocating the CMVideoFormatDescription object. May be NULL.

imageDescriptionBlockBuffer

CMBlockBuffer containing ImageDescription data structure in big-endian byte ordering.

imageDescriptionStringEncoding

Pass CFStringGetSystemEncoding or GetApplicationTextEncoding.

imageDescriptionFlavor

kCMImageDescriptionFlavor constant or NULL for QuickTimeMovie flavor.

videoFormatDescriptionOut

Receives new CMVideoFormatDescription.

See Also

Video-Specific Functions

CMVideoFormatDescriptionCreate

Creates a format description for a video media stream.

CMVideoFormatDescriptionCreateForImageBuffer

Creates a format description for a video media stream contained in CVImageBuffers of the type provided.

CMVideoFormatDescriptionGetCleanAperture

Returns the clean aperture.

CMVideoFormatDescriptionGetDimensions

Returns the video dimensions (in encoded pixels).

CMVideoFormatDescriptionGetExtensionKeysCommonWithImageBuffers

Returns an array of the keys that are used both as CMVideoFormatDescription extensions and CVImageBuffer attachments and attributes.

CMVideoFormatDescriptionGetPresentationDimensions

Returns the dimensions, adjusted to take pixel aspect ratio and/or clean aperture into account.

CMVideoFormatDescriptionMatchesImageBuffer

Checks to see if a given format description matches an image buffer.

CMVideoFormatDescriptionCreateFromH264ParameterSets

Creates a format description for a video media stream described by H.264 parameter set NAL units.

CMVideoFormatDescriptionGetH264ParameterSetAtIndex

Returns a parameter set contained in a H.264 format description.

CMVideoFormatDescriptionCopyAsBigEndianImageDescriptionBlockBuffer

Copies the contents of a CMVideoFormatDescription to a CMBlockBuffer in big-endian byte ordering.

CMVideoFormatDescriptionCreateFromBigEndianImageDescriptionData

Creates a CMVideoFormatDescription from a big-endian ImageDescription data structure.

CMSwapBigEndianImageDescriptionToHost

Converts an ImageDescription data structure from big-endian to host-endian in place.

CMSwapHostEndianImageDescriptionToBig

Converts an ImageDescription data structure from host-endian to big-endian in place.