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IltmmConvert::put_SelectedSourceStream

Summary

Changes the current program.

Syntax

#include "ltmm.h"

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

Changes the current program.

Parameters

ltmmConvert_Stream streamType

The type of stream to select. Currently, only two stream types are supported: Video (ltmmConvert_Stream_Video) and Audio (ltmmConvert_Stream_Audio).

long val

Index of the stream to select.

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 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