MFGetAttributesAsBlob function (mfapi.h)

Converts the contents of an attribute store to a byte array.

Syntax

HRESULT MFGetAttributesAsBlob(
  [in]  IMFAttributes *pAttributes,
  [out] UINT8         *pBuf,
  [in]  UINT          cbBufSize
);

[in] pAttributes

Pointer to the IMFAttributes interface of the attribute store.

[out] pBuf

Pointer to an array that receives the attribute data.

[in] cbBufSize

Size of the pBuf array, in bytes. To get the required size of the buffer, call MFGetAttributesAsBlobSize.

The function returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code	Description
S_OK	The function succeeded.
MF_E_BUFFERTOOSMALL	The buffer given in pBuf is too small.

The function skips any attributes with IUnknown pointer values (MF_ATTRIBUTE_IUNKNOWN); they are not stored in the array.

To convert the byte array back into an attribute store, call MFInitAttributesFromBlob.

To write an attribute store to a stream, call the MFSerializeAttributesToStream function.

Requirement	Value
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
Library	Mfplat.lib
DLL	Mfplat.dll