What does HRESULT 0xC00D1BA6 (NS_E_ACTIVE_SG_DEVICE_CONTROL_DISCONNECTED) mean?

NS_E_ACTIVE_SG_DEVICE_CONTROL_DISCONNECTED

Diagnostic meaning beyond the standard text

For NS_E_ACTIVE_SG_DEVICE_CONTROL_DISCONNECTED (0xC00D1BA6), the actionable event is the control device for the active source group disconnects while capture is active.

Why the session can reach this point

Windows Media Encoder device control coordinates a capture source with a control plug-in, tape transport, mark-in/mark-out entries and an edit decision list. The capture device and the control device must refer to the same usable hardware path.

Video capture can remain available while the separate control plug-in loses transport control, so a device-control failure is not automatically a capture-format failure. One concrete way to reach the condition is that the DV deck control interface disappears while its video stream remains briefly available.

Decision path

1. Record 0xC00D1BA6, the Encoder version and the exact API call or property access that returned it.
2. Export the current .wme or .prx configuration, then capture control-device identifier, plug-in state, transport event and capture-device state.
3. Verify the tape-device control and edit decision lists precondition without changing the source, profile and output sink at the same time.
4. Run one controlled comparison that changes only the identified precondition: stop device-controlled capture and reconnect or replace the control path before resuming.

Codes with similar symptoms but different owners

Safe recovery

Stop device-controlled capture and reconnect or replace the control path before resuming.

Do not rewind, eject or overwrite the tape before recording the failing EDL entry and current timecode; that changes the evidence used to reproduce the seek or end-of-tape condition.

Source material

• WMEncEditDecisionList.Item.
• WMTIMECODE device-control structure.
• IWMEncSource.MarkOut.
• Preparing a source group for encoding.