Error 0xC00D1B66

Value: -1072882842 | 0xC00D1B66 | 3222084454

What does it mean ?

NS_E_INVALIDCALL_WHILE_ENCODER_RUNNING  
This operation is not allowed while encoding.
Value: 7014 | 0x1B66 | 0b0001101101100110

Where does it come from ?

FACILITY_MEDIASERVER  
Windows Media Server
Value: 13 | 0x00D | 0b00001101

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