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NS_E_OUTPUT_PROTECTION_SCHEME_UNSUPPORTED
What this result actually narrows
Treat 0xC00D290A as a state report from NS_E_OUTPUT_PROTECTION_SCHEME_UNSUPPORTED: the license names an output-protection scheme unavailable on the selected path. Within Windows Media DRM output protection, this result is raised while processing license-policy evaluation that compares the content owner’s required output protection level or scheme with the active audio/video output path.
To prove this boundary rather than infer it from a dialog, identify the required scheme and enumerate schemes reported by the output.
Inputs to the decision
The security decision represented by this result depends on license OPL fields, play or copy action, output connector type, compressed/uncompressed state, driver-reported protection capability and selected rendering path. Record the requested action, required OPL values, active connector, negotiated protection mechanism and whether the stream is compressed at that boundary from the same it attempt.
The scope stays narrow: the license names an output-protection scheme unavailable on the selected path. Other content or actions may still be valid.
Validate one precondition
- Preserve this result and
0xC00D290Abefore cleanup, fallback or another media item changes the context. - Compare the failure with a known-good case that changes only the property named by this condition: the license names an output-protection scheme unavailable on the selected path.
- Apply the narrow correction for it: select hardware/driver implementing that scheme or use appropriately licensed content.
- Associate it with its current Windows Media DRM output protection object and the requested action.
- Run the direct check for it: identify the required scheme and enumerate schemes reported by the output.
- Repeat the same action with the same content/device identity and verify that it is not replaced by another policy or trust failure.
From evidence to correction
It should be modeled as a failed precondition, not as an arbitrary media exception. Demonstrate the precondition by choosing to identify the required scheme and enumerate schemes reported by the output, and remove it by choosing to select hardware/driver implementing that scheme or use appropriately licensed content. Record the first lower-layer status beside it because wrapper HRESULTs can otherwise conceal the producing component.
Boundaries excluded by this code
The established fact is that the license names an output-protection scheme unavailable on the selected path. That fact does not independently establish damaged media bytes, a missing decoder, a generally broken network, or invalid rights for every other action.
If the Player, encoder, setup program or device layer later emits a broader error, retain it as the first specific result. The object and operation attached to it are usually more diagnostic than a later cleanup or user-interface summary.
A useful support bundle
| Field | Value |
|---|---|
| Policy input | requested action plus the exact license, certificate, profile, output or registration property evaluated by it |
| Temporal state | trusted/system time, validity interval, request sequence and retry number when they influence it |
| Lower result | the earliest store, network, cryptographic, driver or provider status preceding the final it wrapper |
| Owner | operation, API/callback, object or session identifier, and component/device version associated with it |
| Direct check | identify the required scheme and enumerate schemes reported by the output |
Useful comparisons
| Result | Why it points elsewhere |
|---|---|
NS_E_COMPRESSED_DIGITAL_AUDIO_PROTECTION_LEVEL_UNSUPPORTED | compressed digital audio output lacks the protection level demanded by the license |
NS_E_UNCOMPRESSED_DIGITAL_AUDIO_PROTECTION_LEVEL_UNSUPPORTED | the PCM/uncompressed audio path cannot satisfy the license protection requirement |
NS_E_ANALOG_VIDEO_PROTECTION_LEVEL_UNSUPPORTED | the analog video output cannot apply the policy required by the license |
Corrective action
Repair the owner of the check: select hardware/driver implementing that scheme or use appropriately licensed content. Success means that the same requested action is accepted after that precise state change, not merely that another file or device happens to work.
- It: Do not treat every output-protection result as a missing codec; the decoder can be present while the connector or driver cannot enforce the license policy.
- Do not alter trusted time, revocation enforcement, certificate validation or output policy merely to suppress it; that bypasses the decision instead of correcting its input.
- Retain one failing artifact and one corrected artifact so the resolution of it can be regression-tested.
Proof of repair
For the final it test, keep the content KID or file hash, requested action, user/account, device identity and output route unchanged wherever they apply.
Technical references
- Output protection levels — lists the security and state transitions used to interpret it.
- Working with output protection levels — defines the platform objects used when diagnosing it.
- WMDRM output-protection structures — documents the protocol or API boundary behind it.
- DRM actions and rights — provides the normative workflow relevant to it.
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