Function

CMVideoFormatDescriptionGetPresentationDimensions

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

Declaration

CGSize CMVideoFormatDescriptionGetPresentationDimensions(CMVideoFormatDescriptionRef videoDesc, Boolean usePixelAspectRatio, Boolean useCleanAperture);

Parameters

videoDesc

CMVideoFormatDescription being interrogated.

usePixelAspectRatio

Compute the dimensions maintaining pixel aspect ratio.

useCleanAperture

Compute the dimensions using the clean aperture.

Discussion

Pixel aspect ratio is used to adjust the width, leaving the height alone.

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.

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.

CMVideoFormatDescriptionCreateFromBigEndianImageDescriptionBlockBuffer

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

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.