IMultiMediaStream::EnumMediaStreams method (mmstream.h)

项目
4/26/2023

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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.]

Note This interface is deprecated. New applications should not use it.

The EnumMediaStreams method retrieves a media stream object, specified by index.

Syntax

HRESULT EnumMediaStreams(
  [in]  long         Index,
  [out] IMediaStream **ppMediaStream
);

Parameters

[in] Index

Zero-based index of the media stream to retrieve.

[out] ppMediaStream

Address of a variable that receives an IMediaStream interface pointer.

Return value

Returns an HRESULT value. Possible values include the following.

Return code	Description
E_POINTER	NULL pointer argument.
S_FALSE	Index is out of range.
S_OK	Success.

Remarks

If the return value is S_OK, the caller must release the IMediaStream interface.

Requirements


Target Platform	Windows
Header	mmstream.h