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NS_E_UNCOMPRESSED_DIGITAL_AUDIO_PROTECTION_LEVEL_UNSUPPORTED
Failure scope
For NS_E_UNCOMPRESSED_DIGITAL_AUDIO_PROTECTION_LEVEL_UNSUPPORTED, the failed contract is that the PCM/uncompressed audio path cannot satisfy the license protection requirement. The owner is Windows Media DRM output protection; its working contract covers license-policy evaluation that compares the content owner’s required output protection level or scheme with the active audio/video output path.
Confirm the producer by doing one thing first: record endpoint, driver and uncompressed-audio OPL capability.
Data worth retaining
A complete incident ties together license OPL fields, play or copy action, output connector type, compressed/uncompressed state, driver-reported protection capability and selected rendering path; the minimum correlation set for it is the requested action, required OPL values, active connector, negotiated protection mechanism and whether the stream is compressed at that boundary.
The scope stays narrow: the PCM/uncompressed audio path cannot satisfy the license protection requirement. Other content or actions may still be valid.
Test without erasing evidence
- Preserve this result and
0xC00D2909before cleanup, fallback or another media item changes the context. - Associate this result with its current Windows Media DRM output protection object and the requested action.
- Run the direct check for it: record endpoint, driver and uncompressed-audio OPL capability.
- Compare the failure with a known-good case that changes only the property named by this condition: the PCM/uncompressed audio path cannot satisfy the license protection requirement.
- Apply the narrow correction for it: use a trusted protected audio endpoint or qualifying driver.
- Repeat the same action with the same content/device identity and verify that this result is not replaced by another policy or trust failure.
The transition to retest
When documenting it, state the rejected input and the expected successor state. The rejected input is demonstrated when you record endpoint, driver and uncompressed-audio OPL capability; the successor becomes reachable after you use a trusted protected audio endpoint or qualifying driver. Record the first lower-layer status beside it because wrapper HRESULTs can otherwise conceal the producing component.
Separate cause from wrapper
The established fact is that the PCM/uncompressed audio path cannot satisfy the license protection requirement. 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.
Verification inputs
| Field | Value |
|---|---|
| Owner | operation, API/callback, object or session identifier, and component/device version associated with it |
| Direct check | record endpoint, driver and uncompressed-audio OPL capability |
| 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 |
Different owners, similar dialog
| Result | Why it points elsewhere |
|---|---|
NS_E_ANALOG_VIDEO_PROTECTION_LEVEL_UNSUPPORTED | the analog video output cannot apply the policy required by the license |
NS_E_COMPRESSED_DIGITAL_AUDIO_PROTECTION_LEVEL_UNSUPPORTED | compressed digital audio output lacks the protection level demanded by the license |
NS_E_OUTPUT_PROTECTION_SCHEME_UNSUPPORTED | the license names an output-protection scheme unavailable on the selected path |
When a retry is valid
Recovery should change the failed precondition by choosing to use a trusted protected audio endpoint or qualifying driver. Success means that the same requested action is accepted after that precise state change, not merely that another file or device happens to work.
- A broad reset is not the first step for 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.
Final verification
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 — documents the protocol or API boundary behind it.
- Working with output protection levels — provides the normative workflow relevant to it.
- WMDRM output-protection structures — lists the security and state transitions used to interpret it.
- DRM actions and rights — defines the platform objects used when diagnosing it.
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