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NS_E_MSAUDIO_NOT_INSTALLED
A practical diagnostic path for NS_E_MSAUDIO_NOT_INSTALLED
The diagnostic value of this result (0xC00D0BB9) is its location: the requested Microsoft audio encoder or decoder is not registered for the selected profile. That location is the msaudio not installed media-format check, not a generic statement that the file or server is unusable.
Profile and sample evidence
| Capture | Why it matters |
|---|---|
| Owning call | Record the API method, object identity, thread or callback and timestamp for the msaudio not installed media-format check. |
| Values to record | codec CLSID or subtype, installed binary version, selected input and output media types, first codec HRESULT and the sample timestamp where processing stopped. |
| Comparison case | Use one known-good resource that exercises the same msaudio not installed media-format check while changing only the rejected precondition. |
A controlled media-format test
- Log
0xC00D0BB9, the exact operation and the first failure time. - Preserve codec CLSID or subtype, installed binary version, selected input and output media types, first codec HRESULT and the sample timestamp where processing stopped.
- Perform one isolated test: enumerate codecs for the exact subtype and test the same profile on a machine with the matching codec component installed.
- Repeat through the same API and protocol path; a different player or local-copy test is useful only as a comparison, not as proof that the msaudio not installed media-format check is fixed.
What completed, and what did not
Before the msaudio not installed media-format check, earlier setup may have succeeded, but the requested Microsoft audio encoder or decoder is not registered for the selected profile was not completed. This is why logs should preserve both the last successful call and it.
A focused comparison is to enumerate codecs for the exact subtype and test the same profile on a machine with the matching codec component installed. This isolates the disputed precondition without changing the media identity or unrelated machine settings.
Misleading actions
- renaming the media file or changing its extension; codec selection is based on the stream subtype and negotiated format.
- Record redacted identifiers, lengths, hashes and protocol fields needed to reproduce the msaudio not installed media-format check.
Nearby results are not interchangeable
Main distinction: absence means no matching component was selected; a codec-error result means a selected component later failed.
| Nearby HRESULT | How to compare it |
|---|---|
NS_E_INVALID_INPUT_FORMAT | the writer or transform has rejected the raw input media type before accepting samples. |
NS_E_UNEXPECTED_MSAUDIO_ERROR | the Microsoft audio codec was created but failed during configuration or sample processing. |
NS_E_INVALID_OUTPUT_FORMAT | the decoded or transformed output media type is not one the selected component can expose. |
Technical references
- Windows Media Format SDK overview
- Input, stream and output formats
- Profiles
- Windows Media SDK objects
- Microsoft HRESULT registry
Retain the post-fix trace so a later pipeline result is not mistaken for recurrence of this failure.
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