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IltmmCapture::EstimateOutputSize

Summary

Retrieves the estimated capturing output size, in bytes, for the specified duration.

Syntax

#include "ltmm.h"

Language	Syntax
C	HRESULT IltmmCapture_EstimateOutputSize(pCapture, Duration, pVal)
C++	HRESULT EstimateOutputSize(Duration, pVal)

Parameters

IltmmCapture *pCapture

Pointer to an IltmmCapture interface.

double Duration

Value the represents the duration in seconds for which to retrieve the estimated output size.

double *pVal

Pointer to a variable to be updated with the estimated output size for the duration.

Returns

Value	Meaning
S_OK	The function was successful.
<> S_OK	An error occurred. Refer to the Error Codes or the HRESULT error codes in the DirectShow documentation.

Comments

The estimated output size is calculated using the following equation:

Size = (Bitrate * Duration) / 8.

The returned size depends on the state of the capture object.

If the object is in the running state, the returned size is related to the actual number of bytes that have been written.

While if the object is not running, the returned size is a theoretical value dependent on the capturing settings and the chosen encoding settings.

Required DLLs and Libraries

LTMM
For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64.

Example

Language	Example
C	IltmmCapture::EstimateOutputSize
C++	IltmmCapture::EstimateOutputSize

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