IWMOutputMediaProps::GetStreamGroupName method (wmsdkidl.h)

Artigo
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 It has been superseded by Source Reader and Sink Writer.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 GetStreamGroupName method is not implemented in this release, and returns the empty string.

Syntax

HRESULT GetStreamGroupName(
  [out]     WCHAR *pwszName,
  [in, out] WORD  *pcchName
);

Parameters

[out] pwszName

Pointer to a wide-character null-terminated string containing the name. Pass NULL to retrieve the length of the name.

[in, out] pcchName

On input, a pointer to a variable containing the length of the pwszName array in wide characters (2 bytes). On output, and if the method succeeds, the variable contains the length of the name, including the terminating null character.

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 pcchName parameter is NULL.
ASF_E_BUFFERTOOSMALL	The buffer pointed to by the pwszName parameter is not large enough.

Remarks

You should make two calls to GetStreamGroupName. On the first call, pass NULL as pwszName. On return, the value pointed to by pcchName is set to the number of wide characters, including the terminating null character, required to hold the stream group name. Then you can allocate the required amount of memory for the string and pass a pointer to it as pwszName on the second call.

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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