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IltmmConvert::get_SourceStreamType

Summary

Gets the number of streams in the current program of the specified streamType.

Syntax

#include "ltmm.h"

Language	Syntax
C	HRESULT IltmmConvert_get_SourceStreamCount(pConvert, streamType, pVal)
C++	HRESULT get_SourceStreamCount(streamType, pVal)

Parameters

IltmmConvert *pConvert

Pointer to an IltmmConvert interface.

ltmmConvert_Stream streamType

The type of stream you're interested in. Currently, only two stream types are supported: Video (ltmmConvert_Stream_Video) and Audio (ltmmConvert_Stream_Audio).

long *pVal

Pointer to a variable to be updated with the number of streams of the specified streamType.

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

See the Programs and Streams topic for more information on programs and streams.

This property returns the number of streams of a particular type in the current program. You can then select which streams you wish to play by calling IltmmConvert::put_SelectedSourceStream.

If you change the current program using IltmmConvert::put_CurrentSourceProgram, the number of streams might change. So you will need to call IltmmConvert::get_SourceStreamCount again.