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NS_E_WME_VERSION_MISMATCH
The failing boundary in the Encoder object model
The useful reading of NS_E_WME_VERSION_MISMATCH (0xC00D1B8B) is not merely the standard message shown above. It locates loading a.wme configuration whose schema or feature set is unsupported by this Encoder version inside source groups, streams and plug-ins.
The Encoder object model groups audio, video and script inputs in an IWMEncSourceGroup, associates one profile with that group, and asks a source plug-in to expose a media format that can feed the selected output streams in a session that returns this result.
Evidence that separates this code from a wrapper error
Successful creation of the COM objects does not prove that the source group is complete; profile assignment, source discovery and format negotiation are later checkpoints in a session that returns this result. For example, a session authored by a later Encoder build is deployed to an older host. 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 | configuration file version, creating Encoder version and features referenced in the file |
| Producing object | source-group collection index and name, active/prepared state, stream type, input scheme and stream name, source plug-in CLSID, negotiated media type and assigned profile |
| 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 wme version mismatch boundary |
Interpret the next measurement
| Observation | How to interpret it |
|---|---|
| Observation that supports it | The decisive evidence is configuration file version, creating Encoder version and features referenced in the file. It confirms loading a.wme configuration whose schema or feature set is unsupported by this Encoder version in the same object generation. |
| Observation that points to an earlier failure | The recorded values satisfy the wme version 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 (loading a.wme configuration whose schema or feature set is unsupported by this Encoder version), but a codec, archive or broadcast sink then fails in a subsequent stage. |
| Verification after correction | Apply this isolated change: open or convert the configuration with a compatible Encoder release, then save a supported copy. The original wme version mismatch call should then advance past the same checkpoint. |
The operational impact of it is limited to the source groups, streams and plug-ins transition that owns loading a.wme configuration whose schema or feature set is unsupported by this Encoder version. In the representative case where a session authored by a later Encoder build is deployed to an older host, keep the first failing call and its object identity so a later wrapper cannot replace the wme version mismatch evidence.
Test the condition without rewriting the session
- Record
0xC00D1B8B, it, the Encoder version and the exact API call or property access that returned it. - Export the current
.wmeor.prxconfiguration, then capture configuration file version, creating Encoder version and features referenced in the file. - verify the source groups, streams and plug-ins precondition without changing the source, profile and output sink at the same time.
- Run one controlled comparison in which only this condition changes: open or convert the configuration with a compatible Encoder release, then save a supported copy.
- After the change, recreate the affected Encoder object rather than assuming the existing graph discarded its earlier wme version mismatch state.
Interpret neighboring results carefully
| Result | Why it is a different boundary |
|---|---|
NS_E_INPUTSOURCE_PROBLEM | aggregate source-group health check reports one or more inputs unable to supply data |
NS_E_SOURCE_NOTSPECIFIED | final source-group validation finds an incompletely configured source |
NS_E_NOSOURCEGROUPS | starting an Encoder session with an empty source-group collection |
Resolution and verification
The direct repair for this occurrence is to open or convert the configuration with a compatible Encoder release, then save a supported copy. 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 wme version mismatch checkpoint.
Do not delete and recreate every source group before exporting the.wme configuration and recording the active group; otherwise the failing object relation is lost in a session that returns it.
References for the boundary
- Preparing a source group for encoding.
- Retrieving the profile assigned to a source group.
- Retrieving the configured encoder input.
- Saving a Windows Media Encoder configuration.
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