NS_E_ACTIVE_SG_DEVICE_DISCONNECTED: meaning and diagnosis

Status / error code:

Category:

Constant name:

Source:

Facility:

Operating System:

Description:

A capture device in the current active source is no longer available.%0

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NS_E_NO_PAL_INVERSE_TELECINE	NS_E_ACTIVE_SG_DEVICE_CONTROL_DISCONNECTED

NS_E_ACTIVE_SG_DEVICE_DISCONNECTED

How to interpret the code in a real encoding session

0xC00D1BA5 is named NS_E_ACTIVE_SG_DEVICE_DISCONNECTED. Its practical scope is a capture device used by the active source group is removed or becomes unavailable, which belongs to video capture and compressor negotiation rather than to every part of Windows Media playback or Windows itself.

Mechanism and point of failure

A live video source passes through device opening, capture-format negotiation, optional clipping and preview-window setup before an encoder codec accepts the frames. Width, height, pixel format and driver state belong to this boundary.

Seeing a device in enumeration or obtaining a preview frame does not establish that the requested capture format can be delivered continuously to the encoder. A typical reproduction is: a USB capture device is unplugged during encoding. This makes the first result from the Encoder more valuable than a later generic message.

Minimal experiment

Record 0xC00D1BA5, the Encoder version and the exact API call or property access that returned it.
Export the current .wme or .prx configuration, then capture device instance ID, removal notification, last sample time and active source-group identity.
Verify the video capture and compressor negotiation precondition without changing the source, profile and output sink at the same time.
Run one controlled comparison that changes only the identified precondition: restore the same device or stop and rebuild the group with an available source.

Do not collapse these results together

Result	Why it differs
`NS_E_UNEXPECTED_DISPLAY_SETTINGS`	screen-capture session detects display geometry or color-depth changes after configuration
`NS_E_UNSUPPORTED_ENCODER_DEVICE`	opening a device that enumerates but is not supported by the Encoder source plug-in
`NS_E_NO_DATAVIEW_SUPPORT`	request for Encoder Video panel data from a source or output path that cannot expose preview samples

What to change—and what to leave alone

Do not keep retrying an unstable capture driver in the same process after preserving the first error; close the graph and test one known-native format in a fresh process.

Authoritative documentation

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