IMPEG2StreamIdMap::UnmapStreamId method (strmif.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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 UnmapStreamId method unmaps the Stream ID mapping created in a previous call to MapStreamId.
Syntax
HRESULT UnmapStreamId(
[in] ULONG culStreamId,
[in] ULONG *pulStreamId
);
Parameters
[in] culStreamId
The number of elements in the pulStreamID array.
[in] pulStreamId
Array of Stream IDs mapped for this pin.
Return value
Returns S_OK if successful. If the method fails, it returns an HRESULT error code.
Remarks
There is typically only one stream ID mapped to a given pin, therefore pulStreamID will typically contain a single element.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | strmif.h (include Dshow.h) |
| Library | Strmiids.lib |