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CBaseVideoRenderer.GetStdDev method

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[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The GetStdDev method estimates the standard deviation in milliseconds between when each frame is due and when it is actually rendered, for per-frame statistics.

Syntax

HRESULT GetStdDev(
   int      nSamples,
   int      *piResult,
   LONGLONG llSumSq,
   LONGLONG iTot
);

Parameters

nSamples

Integer value that contains the number of video samples received by the video renderer.

piResult

Pointer to an integer value that will contain the standard deviation.

llSumSq

Value that represents the standard deviation, in milliseconds, of all rendered video samples. The lower the value, the more consistent the rendering.

iTot

Value that represents the mean value, in milliseconds, between the stamped time and rendered time for all rendered video samples.

Return value

Returns NOERROR.

Requirements

Requirement Value
Header
Renbase.h (include Streams.h)
Library
Strmbase.lib (retail builds);
Strmbasd.lib (debug builds)

See also

CBaseVideoRenderer Class