IltmmMediaInfo::get_AudioChannels

#include "ltmm.h"

C Syntax

HRESULT IltmmMediaInfo_get_AudioChannels(pMediaInfo, Channels)

C++ Syntax

HRESULT get_AudioChannels(Channels)

 

IltmmMediaInfo *pMediaInfo;

/* pointer to an interface */

long * Channels;

/* pointer to a variable */

Retrieves the number of audio channels for the current stream in the current source media file.

Parameter

Description

pMediaInfo

Pointer to an IltmmMediaInfo interface.

Channels

Pointer to a variable that receives the number of audio channels.

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

This function will fail if the current stream is not an audio stream.

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.

To set the current stream, call IltmmMediaInfo::put_CurrentStream.

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.

See Also

Elements:

IltmmMediaInfo::get_AudioBitsPerSample, IltmmMediaInfo::get_AudioAvgBytesPerSec, IltmmMediaInfo::get_AudioFormatTag, IltmmMediaInfo::get_AudioChannels, IltmmMediaInfo::get_AudioSamplesPerSec,  IltmmMediaInfo::put_CurrentStream, IltmmMediaInfo::get_CurrentStream, IltmmMediaInfo::get_StreamDuration, IltmmMediaInfo::get_StreamMediaType, IltmmMediaInfo::get_StreamSubtype, IltmmMediaInfo::get_StreamSubtypeName, IltmmMediaInfo::get_StreamType, IltmmMediaInfo::get_StreamTypeName, IltmmMediaInfo::get_OutputStreams, IltmmMediaInfo::put_SourceFile

Topics:

Multimedia Function Group
Media File Information

Example

For a C example, refer to Retrieving Media File Information for C.

For a C++ example, refer to Retrieving Media File Information for C++.