IMediaObject::GetStreamCount method (mediaobj.h)

[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The GetStreamCount method retrieves the number of input and output streams.

Syntax

HRESULT GetStreamCount(
  [out] DWORD *pcInputStreams,
  [out] DWORD *pcOutputStreams
);

Parameters

[out] pcInputStreams

Pointer to a variable that receives the number of input streams. Cannot be NULL.

[out] pcOutputStreams

Pointer to a variable that receives the number of output streams. Cannot be NULL.

Return value

Returns an HRESULT value. Possible values include those in the following table.

Remarks

The DMO might have zero input streams or zero output streams. The number of streams does not change; a DMO cannot dynamically add or remove streams.

Requirements

See also

IMediaObject Interface