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NS_E_WMG_UNEXPECTEDPREROLLSTATUS
NS_E_WMG_UNEXPECTEDPREROLLSTATUS: what the result means
NS_E_WMG_UNEXPECTEDPREROLLSTATUS (0xC00D104E) means the queued graph returned a preroll status that the player cannot advance from as expected.
What to capture
Capture the complete preroll state sequence, queued item identity, graph state and first callback/status that differs from a successful queue operation.
Focused verification
Repeat with one known-compatible queued item and compare the first preroll transition. Diagnose the first divergent state rather than repeatedly restarting the entire playlist.
Technical references
- The DirectShow filter graph
- DirectShow media types
- Negotiating media types
- WM ASF Reader filter
- Microsoft HRESULT registry
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