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NS_E_NO_TWOPASS_TIMECOMPRESSION
The failing boundary in the Encoder object model
The useful reading of NS_E_NO_TWOPASS_TIMECOMPRESSION (0xC00D1BD8) is not merely the standard message shown above. It locates time compression is combined with a two-pass encoding workflow inside preprocessing, analysis and multipass constraints.
Inverse telecine, time compression, image preprocessing, content analysis and two-pass encoding require access to particular source types and often require rereading or temporarily storing the source in a session that returns this result. Live, looping and device inputs impose additional restrictions.
Evidence that separates this code from a wrapper error
The underlying audio or video source may be healthy while the requested preprocessing workflow is impossible for that source lifecycle in a session that returns this result. For example, a two-pass VBR preset is combined with shortened playback duration. 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 | pass count, time-compression ratio and source-storage settings |
| Producing object | source type, live/file flag, Repeat flag, pass count, temporary-storage setting, preprocessing filters, analyzer frame count, input frame rate, content EDL path and selected codec mode |
| 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 no twopass timecompression boundary |
Interpret the next measurement
| Observation | How to interpret it |
|---|---|
| Observation that supports it | The decisive evidence is pass count, time-compression ratio and source-storage settings. It confirms time compression is combined with a two-pass encoding workflow in the same object generation. |
| Observation that points to an earlier failure | The recorded values satisfy the no twopass timecompression 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 (time compression is combined with a two-pass encoding workflow), but a codec, archive or broadcast sink then fails in a subsequent stage. |
| Verification after correction | Apply this isolated change: choose one-pass encoding or disable time compression. The original no twopass timecompression call should then advance past the same checkpoint. |
The operational impact of it is limited to the preprocessing, analysis and multipass constraints transition that owns time compression is combined with a two-pass encoding workflow. In the representative case where a two-pass VBR preset is combined with shortened playback duration, keep the first failing call and its object identity so a later wrapper cannot replace the no twopass timecompression evidence.
Test the condition without rewriting the session
- Record
0xC00D1BD8, it, the Encoder version and the exact API call or property access that returned it. - Export the current
.wmeor.prxconfiguration, then capture pass count, time-compression ratio and source-storage settings. - verify the preprocessing, analysis and multipass constraints precondition without changing the source, profile and output sink at the same time.
- Run one controlled comparison in which only this condition changes: choose one-pass encoding or disable time compression.
- After the change, recreate the affected Encoder object rather than assuming the existing graph discarded its earlier no twopass timecompression state.
Interpret neighboring results carefully
| Result | Why it is a different boundary |
|---|---|
NS_E_NO_AUDIO_TIMECOMPRESSION | time compression is enabled for a session without an audio stream |
NS_E_BAD_CONTENTEDL | loading or parsing the voice-codec content optimization EDL |
NS_E_NO_FRAMES_SUBMITTED_TO_ANALYZER | content analyzer completes or is queried without receiving any video frames |
Resolution and verification
The direct repair for this occurrence is to choose one-pass encoding or disable time compression. 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 no twopass timecompression checkpoint.
Do not enable several preprocessing features at once during diagnosis; validate the plain one-pass source first, then add one transformation with its required storage or analysis stage in a session that returns it.
References for the boundary
- Two-pass encoding.
- IWMEncContentAnalyzer.Property.
- Voice-codec editing decision lists.
- IWMEncSource.Repeat.
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