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NS_E_WMR_NOSOURCEFILTER
NS_E_WMR_NOSOURCEFILTER: what the result means
NS_E_WMR_NOSOURCEFILTER (0xC00D105C) means the requested operation ran without the required Windows Media/ASF source filter in the current graph.
What to capture
Enumerate the graph and record the source filter actually present, how the graph was built and the object on which the failing operation was invoked.
Focused verification
Build a minimal graph that explicitly contains the expected source filter and repeat the same call. If it succeeds, correct graph construction or object selection.
Technical references
- The DirectShow filter graph
- DirectShow media types
- Negotiating media types
- WM ASF Reader filter
- Microsoft HRESULT registry
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