IWMWriter::GetInputCount method (wmsdkidl.h)

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4/26/2023

[The feature associated with this page, Windows Media Format 11 SDK, is a legacy feature. It has been superseded by Source Reader and Sink Writer. Source Reader and Sink Writer have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Source Reader and Sink Writer instead of Windows Media Format 11 SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The GetInputCount method retrieves the number of uncompressed input streams.

Syntax

HRESULT GetInputCount(
  [out] DWORD *pcInputs
);

Parameters

[out] pcInputs

Pointer to a count of inputs.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code	Description
S_OK	The method succeeded.
E_INVALIDARG	The pcInputs parameter is NULL.

Remarks

This method along with GetInputProps can be used to enumerate through the various inputs, and get the input format of each. These are not the output Windows Media streams specified in the profile; in a multiple bit rate scenario, one input stream can map to multiple Windows Media streams.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only],Windows Media Format 7 SDK, or later versions of the SDK
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	wmsdkidl.h (include Wmsdk.h)
Library	Wmvcore.lib; WMStubDRM.lib (if you use DRM)

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