Error 0x000D7169

Value: 881001 | 0x000D7169 | 881001

What does it mean ?

MF_S_VIDEO_DISABLED_WITH_UNKNOWN_SOFTWARE_OUTPUT  
This video stream is disabled because it is being sent to an unknown software output.
Value: 29033 | 0x7169 | 0b0111000101101001

Where does it come from ?

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

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