Function

CMFormatDescriptionGetTypeID

Returns the CFTypeID of CMFormatDescription objects.

Declaration

CFTypeID CMFormatDescriptionGetTypeID(void);

Discussion

You can check if a CFTypeRef object is actually a CMFormatDescription by comparing CFGetTypeID(object) with CMFormatDescriptionGetTypeID().

See Also

Common Functions

CMFormatDescriptionCreate

Creates a generic CMFormatDescription object. You should not call this method for the media types that has specific create functions such as audio, video, text, muxed, metaData and timeCode.

CMFormatDescriptionEqual

Compares two CMFormatDescription objects for equality.

CMFormatDescriptionEqualIgnoringExtensionKeys

Compares two CMFormatDescription objects for equality, ignoring differences in the specified lists of format description extension keys and sample description extension keys.

CMFormatDescriptionGetExtension

Returns the specified extension of a CMFormatDescription.

CMFormatDescriptionGetExtensions

Returns an immutable dictionary containing all the extensions of a CMFormatDescription.

CMFormatDescriptionGetMediaSubType

Returns the media subtype of a CMFormatDescription.

CMFormatDescriptionGetMediaType

Returns the media type of a CMFormatDescription.