IltmfCapture::EstimateOutputSize

#include "ltmf.h"

Platform Syntax
C HRESULT IltmfCapture_EstimateOutputSize(pCapture, Duration, pVal)
C++ HRESULT EstimateOutputSize(Duration, pVal)

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

Parameters

IltmfCapture *pCapture

Pointer to an IltmfCapture 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 MediaFoundation 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

Platforms

Win32, x64.

See Also

Functions

Topics

Example

For a C++ example, refer to IltmfCapture::EstimateOutputSize Example for C++.

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© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.