IWMSyncReader::GetOutputCount method (wmsdkidl.h)
[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 It has been superseded by Source Reader and Sink Writer.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 GetOutputCount method retrieves the number of outputs that exist for the file open in the synchronous reader.
Syntax
HRESULT GetOutputCount(
[out] DWORD *pcOutputs
);
Parameters
[out] pcOutputs
Pointer to a DWORD that receives the number of outputs in the file.
Return value
The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Return code | Description |
|---|---|
|
The method succeeded. |
|
The pcOutputs parameter is NULL. |
|
The method failed for an unspecified reason. |
Remarks
To enumerate the outputs, call GetOutputCount to get the number of outputs, and then call GetOutputProps.
Requirements
| 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) |