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NS_E_COMPRESSED_DIGITAL_AUDIO_PROTECTION_LEVEL_UNSUPPORTED
Meaning in the active workflow
The first actionable fact in NS_E_COMPRESSED_DIGITAL_AUDIO_PROTECTION_LEVEL_UNSUPPORTED is that compressed digital audio output lacks the protection level demanded by the license. The subsystem producing this result is Windows Media DRM output protection, not the media decoder; it performs license-policy evaluation that compares the content owner’s required output protection level or scheme with the active audio/video output path.
Before changing the machine, capture digital-audio connector, compressed state and negotiated OPL.
Diagnostic checklist
| Field | Value |
|---|---|
| Direct check | capture digital-audio connector, compressed state and negotiated OPL |
| Policy input | requested action plus the exact license, certificate, profile, output or registration property evaluated by this result |
| Temporal state | trusted/system time, validity interval, request sequence and retry number when they influence this result |
| 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 |
Preserve the original generation
It is meaningful only while the following state remains associated with one operation: license OPL fields, play or copy action, output connector type, compressed/uncompressed state, driver-reported protection capability and selected rendering path. Preserve the requested action, required OPL values, active connector, negotiated protection mechanism and whether the stream is compressed at that boundary for it.
The producing layer has not made a claim about every media operation; it has only established that compressed digital audio output lacks the protection level demanded by the license.
Failure model
When documenting it, state the rejected input and the expected successor state. The rejected input is demonstrated when you capture digital-audio connector, compressed state and negotiated OPL; the successor becomes reachable after you route audio through an output supporting the required compressed-audio protection. Use a known-good counterpart only as a control; do not replace the failing artifact before its identifiers and hashes are recorded.
What remains unknown
The established fact is that compressed digital audio output lacks the protection level demanded by the license. 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.
Confirm the boundary
- Preserve it and
0xC00D2908before 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: compressed digital audio output lacks the protection level demanded by the license.
- Apply the narrow correction for it: route audio through an output supporting the required compressed-audio protection.
- Associate it with its current Windows Media DRM output protection object and the requested action.
- Run the direct check for it: capture digital-audio connector, compressed state and negotiated OPL.
- Repeat the same action with the same content/device identity and verify that it is not replaced by another policy or trust failure.
Compare neighboring states
| Result | Why it points elsewhere |
|---|---|
NS_E_UNCOMPRESSED_DIGITAL_VIDEO_PROTECTION_LEVEL_UNSUPPORTED | the uncompressed video rendering path cannot enforce the license’s minimum protection |
NS_E_ANALOG_VIDEO_PROTECTION_LEVEL_UNSUPPORTED | the analog video output cannot apply the policy required by the license |
NS_E_UNCOMPRESSED_DIGITAL_AUDIO_PROTECTION_LEVEL_UNSUPPORTED | the PCM/uncompressed audio path cannot satisfy the license protection requirement |
Operational response
The next attempt becomes meaningful only after you route audio through an output supporting the required compressed-audio protection. Success means that the same requested action is accepted after that precise state change, not merely that another file or device happens to work.
- While investigating it, keep this restriction: 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.
Confirm the same workflow
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 — defines the platform objects used when diagnosing it.
- Working with output protection levels — documents the protocol or API boundary behind it.
- WMDRM output-protection structures — provides the normative workflow relevant to it.
- DRM actions and rights — lists the security and state transitions used to interpret it.
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