IVMRFilterConfig9::GetNumberOfStreams method (vmr9.h)
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetNumberOfStreams method retrieves the number of input streams being mixed.
Syntax
HRESULT GetNumberOfStreams(
[out] DWORD *pdwMaxStreams
);
Parameters
[out] pdwMaxStreams
Receives the number of streams being mixed, which is equal to the number of input pins on the VMR.
Return value
The method returns an HRESULT. Possible values include those in the following table.
| Return code | Description |
|---|---|
|
The method succeeded. |
|
PdwMaxStreams is invalid |
Requirements
| Minimum supported client | Windows XP with SP2 [desktop apps only] |
| Minimum supported server | Windows Server 2003 R2 [desktop apps only] |
| Target Platform | Windows |
| Header | vmr9.h |
| Library | Strmiids.lib |