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NS_E_WMR_NOCALLBACKAVAILABLE
NS_E_WMR_NOCALLBACKAVAILABLE: what the result means
NS_E_WMR_NOCALLBACKAVAILABLE (0xC00D105E) means the source filter has no callback object available for the requested exchange.
What to capture
Record the source-filter instance, callback registration/assignment sequence, object lifetime and the exact call that asks the filter to use the callback.
Focused verification
Verify that the callback is installed on the same live source-filter instance before issuing the request. Recreating unrelated filters does not repair a missing callback association.
Technical references
- The DirectShow filter graph
- DirectShow media types
- Negotiating media types
- WM ASF Reader filter
- Microsoft HRESULT registry
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