IltmmMediaInfo::get_SourceBitRate

Summary

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

Syntax

#include "ltmm.h"

Language Syntax
C HRESULT IltmmMediaInfo_get_SourceBitRate(pMediaInfo, pVal)
C++ HRESULT get_SourceBitRate(pVal)

Parameters

IltmmMediaInfo *pMediaInfo

Pointer to an IltmmMediaInfo Interface.

long *pVal

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

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 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

Platforms

Win32, x64.

See Also

Functions

Topics

Example

Language Example
C Retrieving Media File Information
C++ Retrieving Media File Information
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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.