MFSetAttributeRatio function

Sets a ratio as a 64-bit attribute value.

Syntax


HRESULT MFSetAttributeRatio(
  _In_ IMFAttributes *pAttributes,
  _In_ REFGUID       guidKey,
  _In_ UINT32        unNumerator,
  _In_ UINT32        unDenominator
);

Parameters

pAttributes [in]: A pointer to the IMFAttributes interface of the attribute store.
guidKey [in]: A GUID that identifies the value to set. If this key already exists, the function overwrites the old value.
unNumerator [in]: The numerator of the ratio.
unDenominator [in]: The denominator of the ratio.

Return value

If this function succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Remarks

Some attributes specify a ratio as a packed UINT64 value. This function packs the numerator and denominator into a single UINT64 value.

Requirements

Minimum supported client	Windows Vista [desktop apps \| Windows Store apps]
Minimum supported server	Windows Server 2008 [desktop apps \| Windows Store apps]
Header	Mfapi.h