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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 |
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.
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
Compressed digital audio output lacks the protection level demanded by the license.
Confirm the condition
- 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 targeted fix: 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.
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.
- 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.
Technical references
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