IltmmMediaInfo::get_SourceBitRate

#include "ltmm.h"

C Syntax

HRESULT IltmmMediaInfo_get_SourceBitRate(pMediaInfo, pVal)

C++ Syntax

HRESULT get_SourceBitRate(pVal)

IltmmMediaInfo *pMediaInfo;

pointer to an interface

long *pVal;

pointer to a variable

Retrieves the calculated bit rate of the current source media file, in bits per second.

Parameter

Description

pMediaInfo

Pointer to an IltmmMediaInfo Interface.

pVal

Pointer to a variable to be updated with the calculated bit rate of the current source media file, in bits per second.

Returns

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 bit rate obtained by this function is calculated as follows:

BitRate = (FileSize * 8) / SourceDuration

Where FileSize and SourceDuration are retrieved using IltmmMediaInfo::get_SourceFileSize and IltmmMediaInfo::get_SourceDuration, respectively.

To get the current source media file, call IltmmMediaInfo::get_SourceFile.

The current source media file, set using IltmmMediaInfo::put_SourceFile, is the file for which the IltmmMediaInfo interface/object gets information. This function must be called before calling any of the other IltmmMediaInfo functions used for retrieving information.

Call IltmmMediaInfo::ResetSource to release the source file when it is no longer needed.

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

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