MFGetAttributeUINT64 function (mfapi.h)

Returns a UINT64 value from an attribute store, or a default value if the attribute is not present.


UINT64 MFGetAttributeUINT64(
  [in] IMFAttributes *pAttributes,
  [in] REFGUID       guidKey,
  [in] UINT64        unDefault


[in] pAttributes

Pointer to the IMFAttributes interface of the attribute store.

[in] guidKey

GUID that identifies which value to retrieve.

[in] unDefault

Default value to return if the attribute store does not contain the specified attribute.

Return value

Returns a UINT64 value.


This helper function queries the attribute store for the UINT64 value specified by guidKey. If the value is not present, the function returns unDefault.

This function is convenient because it never returns a failure code. However, if the attribute in question does not have a meaningful default value, you should call IMFAttributes::GetUINT64 and check for MF_E_ATTRIBUTENOTFOUND.


Minimum supported client Windows Vista [desktop apps | UWP apps]
Minimum supported server Windows Server 2008 [desktop apps | UWP apps]
Target Platform Windows
Header mfapi.h

See also

Attributes and Properties


Media Foundation Functions