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IWMWriterPreprocess::SetNumPreprocessingPasses method (wmsdkidl.h)

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[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 It has been superseded by Source Reader and Sink Writer.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 SetNumPreprocessingPasses method sets the number of passes to perform on an input.

Syntax

HRESULT SetNumPreprocessingPasses(
  [in] DWORD dwInputNum,
  [in] DWORD dwFlags,
  [in] DWORD dwNumPasses
);

Parameters

[in] dwInputNum

DWORD containing the input number for which you want to set the number of passes.

[in] dwFlags

Reserved. Set to zero.

[in] dwNumPasses

DWORD containing the number of preprocessing passes.

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
 dwNumPasses is zero.

OR

dwInputNum specifies an invalid input stream.

OR

dwNumPasses is greater than the maximum number of passes allowed for the specified input.
NS_E_INVALID_REQUEST
 The writer is not running.

OR

The preprocessor has already been configured.

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps only],Windows Media Format 9 Series 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)

See also

IWMWriterPreprocess Interface