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NS_E_CODEC_DMO_ERROR
What NS_E_CODEC_DMO_ERROR means at its owning API
When this result (0xC00D0BDA) appears, the first blocked transition is a codec hosted through the DMO path returned an operational failure. In practice, the failing media-format operation must be reconstructed from the same URL, stream, object instance and call sequence.
A controlled media-format test
- Log
0xC00D0BDA, this result, 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.
- Do not reuse a graph, session, reader or metadata object created before the relevant configuration or resource changed before retrying.
- Perform one isolated test: feed a minimal known-good sample using the same negotiated media type and capture the first codec-specific failure before the SDK maps it.
- 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 format stage is fixed.
What completed, and what did not
Before the reported boundary, earlier setup may have succeeded, but a codec hosted through the DMO path returned an operational failure was not completed. This is why logs should preserve both the last successful call and this result.
A focused comparison is to feed a minimal known-good sample using the same negotiated media type and capture the first codec-specific failure before the SDK maps it. This isolates the disputed precondition without changing the media identity or unrelated machine settings before retrying.
Profile and sample evidence
| Capture | Why it matters |
|---|---|
| Owning call | Record the API method, object identity, thread or callback and timestamp. |
| 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. |
| Object instance | Note when the reader, writer, graph, URL object, streaming session or metadata provider was created; stale state can reproduce it after configuration has changed. |
| Comparison case | Use one known-good resource that exercises the same media-format check while changing only the rejected precondition. |
Misleading actions
- Installing unrelated codec packs before preserving the actual codec CLSID and first internal failure.
- Record redacted identifiers, lengths, hashes and protocol fields needed to reproduce the recorded format state.
Nearby results are not interchangeable
Main distinction: It belongs to format, profile or sample processing, not merely to file-name or network resolution.
| Nearby HRESULT | How to compare it |
|---|---|
NS_E_INVALID_EDL | the edit decision list contains invalid timing, ordering or source-range information |
NS_E_DATA_UNIT_EXTENSION_TOO_LARGE | Per-sample extension data exceeds the size that can be attached to the sample |
NS_E_FEATURE_DISABLED_BY_GROUP_POLICY | Administrative policy blocks the feature before the media operation is attempted |
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 boundary.
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