Contents

VTSessionCopySupportedPropertyDictionary(_:supportedPropertyDictionaryOut:)

Retrieves a dictionary enumerating all the supported properties of a video toolbox session.

Declaration

func VTSessionCopySupportedPropertyDictionary(_ session: VTSession, supportedPropertyDictionaryOut: UnsafeMutablePointer<CFDictionary?>) -> OSStatus

Parameters

session:
The session object.
supportedPropertyDictionaryOut:
A pointer to a Cfdictionary.

Discussion

The keys of the returned dictionary are the supported property keys.

The values are themselves dictionaries, each containing the following optional fields:

The type of value (kVTPropertyTypeKey)
The read/write status of the property (kVTPropertyReadWriteStatusKey)
Whether the property is suitable for serialization (kVTPropertyShouldBeSerializedKey)
A range or list of the supported values, if appropriate
Developer-level documentation for the property (kVTPropertyDocumentationKey)

The caller must release the returned dictionary.

See Also

Getting Properties