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NS_E_DEVICECONTROL_UNSTABLE
NS_E_DEVICECONTROL_UNSTABLE: the failing boundary
NS_E_DEVICECONTROL_UNSTABLE (0xC00D1BE1) means The device is in an unstable state. Check that the device is functioning properly and a tape is in place. The important boundary is device-control state; do not replace this result with a broader “Windows Media failed” diagnosis.
What this result proves
This code proves that the controlled capture device is in an unstable state and cannot safely continue. It does not, by itself, prove a codec, permissions, network, device, or media problem outside that boundary. Preserve the first lower-level result when one exists, because later Player or Encoder errors can hide the original cause.
Evidence and focused verification
Record transport state, tape/media presence, last device-control command and device error; reset or reinitialize the device before resuming the same job. Keep the media object, endpoint, profile, or device identity fixed while changing only that rejected precondition. A successful retest should pass this exact boundary; a different HRESULT from a later stage is new evidence, not recurrence of NS_E_DEVICECONTROL_UNSTABLE.
Technical references
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