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NS_E_PROFILE_MISMATCH
The failing boundary in the Encoder object model
The useful reading of NS_E_PROFILE_MISMATCH (0xC00D1B7B) is not merely the standard message shown above. It locates switching or combining sources whose assigned profiles are not equivalent for the session inside profile, audience and stream topology.
A Windows Media Encoder profile declares content types and one or more audiences in a session that returns this result. Each audience maps source indexes to audio, video, script or file streams and must remain structurally consistent with the other audiences in a multiple-bit-rate profile.
Evidence that separates this code from a wrapper error
Individual fields may be syntactically valid while the complete profile is inconsistent across audiences or does not match the source group in a session that returns this result. For example, two source groups intended for live switching use different audience counts. Preserve the result distinction before a UI layer converts the result into a broad start, capture or profile failure.
| Field | What to preserve |
|---|---|
| Decisive values | profile identifiers or hashes, content types, audience layouts and codec settings for every involved source group |
| Producing object | profile name and content type, audience count and total bitrate, source indexes, stream types, language identifiers, selected audiences and result of IWMEncProfile2.Validate |
| Session correlation | the same source-group generation, audience index, object identity and callback sequence that produced this result |
| Lower-level evidence | the first COM, driver, file-system or codec HRESULT observed before the Encoder mapped the condition to this result |
| Controlled comparison | a known-good session that changes only the setting named in the profile mismatch boundary |
Interpret the next measurement
| Observation | How to interpret it |
|---|---|
| Observation that supports it | The decisive evidence is profile identifiers or hashes, content types, audience layouts and codec settings for every involved source group. It confirms switching or combining sources whose assigned profiles are not equivalent for the session in the same object generation. |
| Observation that points to an earlier failure | The recorded values satisfy the profile mismatch rule, but a source, driver, COM activation or file operation returns a different HRESULT first. |
| Observation that points to a later failure | The Encoder passes this boundary (switching or combining sources whose assigned profiles are not equivalent for the session), but a codec, archive or broadcast sink then fails in a subsequent stage. |
| Verification after correction | Apply this isolated change: use profiles with matching output topology or start a new session for the different profile. The original profile mismatch call should then advance past the same checkpoint. |
The operational impact of it is limited to the profile, audience and stream topology transition that owns switching or combining sources whose assigned profiles are not equivalent for the session. In the representative case where two source groups intended for live switching use different audience counts, keep the first failing call and its object identity so a later wrapper cannot replace the profile mismatch evidence.
Test the condition without rewriting the session
- Record
0xC00D1B7B, it, the Encoder version and the exact API call or property access that returned it. - Export the current
.wmeor.prxconfiguration, then capture profile identifiers or hashes, content types, audience layouts and codec settings for every involved source group. - verify the profile, audience and stream topology precondition without changing the source, profile and output sink at the same time.
- Run one controlled comparison in which only this condition changes: use profiles with matching output topology or start a new session for the different profile.
- After the change, recreate the affected Encoder object rather than assuming the existing graph discarded its earlier profile mismatch state.
Interpret neighboring results carefully
| Result | Why it is a different boundary |
|---|---|
NS_E_MISSING_AUDIENCE | an output-tree reference points to an audience that is absent |
NS_E_AUDIENCE_CONTENTTYPE_MISMATCH | audiences in one output tree declare different overall media content types |
NS_E_MISSING_SOURCE_INDEX | an audience stream lacks a source index mapping |
Resolution and verification
The direct repair for this occurrence is to use profiles with matching output topology or start a new session for the different profile. Recreate the affected source group, profile or output object, repeat the same operation, and confirm that the first failing HRESULT no longer comes from the profile mismatch checkpoint.
Do not repair a profile by deleting arbitrary audiences; export the.prx first and compare the same source index across every audience in a session that returns it.
References for the boundary
- Adding an audience to an encoder profile.
- IWMEncAudienceObj.TotalBitrate.
- Retrieving the profile assigned to a source group.
- Detecting profile compatibility.
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