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IltmmConvert::put_SelectedSourceStream

#include "ltmm.h"

C Syntax	HRESULT IltmmConvert_put_SelectedSourceStream(pConvert, streamType, val)
C++ Syntax	HRESULT put_SelectedSourceStream(streamType, val)

IltmmConvert *pConvert;	pointer to an interface
ltmmConvert_Stream streamType;	the stream type
long val;	index of the strea to select (0-based)

Changes the current program.

Parameter	Description
pConvert	Pointer to an IltmmConvert interface.
streamType	The type of stream to select. Currently, only two stream types are supported: Video (ltmmConvert_Stream_Video) and Audio (ltmmConvert_Stream_Audio).
val	Index of the stream to select.

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 index of the program is 0-based, so it should be between 0 and SourceStreamCount(streamType) - 1, where SourceStreamCount(streamType) is the number of streams of type streamType in the current program. You can get the number of streams of type streamType by calling IltmmConvert::get_SourceStreamCount.

The streams of a particular type are mutually exclusive, so selecting one stream will automatically unselect the previously selected stream of the same type.

You can get the index of the current stream by calling IltmmConvert::get_SelectedSourceStream.

If you change the current program by calling IltmmConvert::put_CurrentSourceProgram, the stream selection might change because the number of streams of type streamType might change.

For more information about programs and streams, see the Programs and Streams topic

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

Example

For a C++ example, see IltmmConvert::get_SourceStreamCount

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Elements:	IltmmConvert::get_SourceStreamCount, IltmmConvert::get_SelectedSourceStream, IltmmConvert::get_SourceProgramCount, IltmmConvert::put_CurrentSourceProgram
Topics:	Multimedia Function Groups
	Closed Captioning, Programs and Streams