IWMVideoMediaProps::GetMaxKeyFrameSpacing method (wmsdkidl.h)

[The feature associated with this page, Windows Media Format 11 SDK, is a legacy feature. It has been superseded by Source Reader and Sink Writer. Source Reader and Sink Writer have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Source Reader and Sink Writer instead of Windows Media Format 11 SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The GetMaxKeyFrameSpacing method retrieves the maximum interval between key frames.

Syntax

HRESULT GetMaxKeyFrameSpacing(
  [out] LONGLONG *pllTime
);

Parameters

[out] pllTime

Pointer to a variable that receives the interval in 100-nanosecond units.

Return value

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

Remarks

This method retrieves the value set by SetMaxKeyFrameSpacing, or the default value for the key frame spacing, during the encoding process only. If called for a file that is open in the reader, the method always returns zero.

For more information, see the Remarks for SetMaxKeyFrameSpacing.

Requirements

See also

IWMVideoMediaProps Interface