Retrieves the estimated capturing output size, in bytes, for the specified duration.
|C||HRESULT IltmmCapture_EstimateOutputSize(pCapture, Duration, pVal)|
|C++||HRESULT EstimateOutputSize(Duration, pVal)|
Pointer to an IltmmCapture interface.
Value the represents the duration in seconds for which to retrieve the estimated output size.
Pointer to a variable to be updated with the estimated output size for the duration.
|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.|
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.
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