IConfigAsfWriter2::StreamNumFromPin method (dshowasf.h)

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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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

The StreamNumFromPin method retrieves the stream number associated with the specified input pin.

Syntax

HRESULT StreamNumFromPin(
  [in]  IPin *pPin,
  [out] WORD *pwStreamNum
);

Parameters

[in] pPin

Pointer to the IPin interface on the input pin.

[out] pwStreamNum

Receives the stream number.

Return value

If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.

Remarks

You may need to use the Windows Media Format SDK interfaces directly to manipulate a stream before running the filter graph. This method is provided because you cannot assume that an ASF stream number is the same as the DirectShow pin number.

Requirements

Requirement	Value
Minimum supported client	Windows XP with SP2 [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Target Platform	Windows
Header	dshowasf.h

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