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NS_E_DATA_UNIT_EXTENSION_TOO_LARGE
NS_E_DATA_UNIT_EXTENSION_TOO_LARGE: evidence, boundary and retest
The useful reading of NS_E_DATA_UNIT_EXTENSION_TOO_LARGE (0xC00D0BD9) is not “media failed” but per-sample extension data exceeds the size that can be attached to the sample. This places the failure at the unit extension too large media-format check and narrows the evidence to collect before another attempt changes state.
Windows Media Format separates the compressed stream profile from the raw input format and from the decoded output selected by a reader in the unit extension too large diagnostic record. The writer then packetizes samples, applies attributes and optional data-unit extensions, so failure at one boundary does not prove that the ASF container itself is unreadable when isolating the unit extension too large case. In the case of NS_E_DATA_UNIT_EXTENSION_TOO_LARGE, preserve the earliest lower-level result because wrappers can map several different causes to the same HRESULT at the unit extension too large checkpoint.
Profile and sample evidence
| Capture | Why it separates NS_E_DATA_UNIT_EXTENSION_TOO_LARGE |
|---|---|
| Owning call | Record the API method, object identity, thread or callback and timestamp for the unit extension too large media-format check. |
| Decisive values | reader or writer object, stream and input numbers, profile identity, sample timestamps, buffer lengths and the first callback or SDK call that returned the code during a controlled unit extension too large retest. |
| Object generation | Note when the reader, writer, graph, URL object, streaming session or metadata provider was created; stale state can reproduce NS_E_DATA_UNIT_EXTENSION_TOO_LARGE after configuration has changed. |
| First nested result | Keep the earliest codec, COM, socket, DNS, parser or provider status before NS_E_DATA_UNIT_EXTENSION_TOO_LARGE; later UI messages are less specific. |
| Comparison case | Use one known-good resource that exercises the same the unit extension too large media-format check while changing only the rejected precondition. |
Failure anatomy
The unit extension too large media-format check is reached when per-sample extension data exceeds the size that can be attached to the sample. The caller must not assume that the next filter, packet, session or metadata state exists after NS_E_DATA_UNIT_EXTENSION_TOO_LARGE.
Use open the same content with a minimal reader or writer configuration and add the disputed option only after the baseline succeeds as the negative control while tracing the unit extension too large path. A later HRESULT means this checkpoint was cleared and the new result belongs to a different stage during a controlled unit extension too large retest.
Nearby results are not interchangeable
Main distinction: this result belongs to format, profile or sample processing, not merely to file-name or network resolution for evidence about unit extension too large.
| Nearby HRESULT | How to compare it |
|---|---|
NS_E_ATTRIBUTE_NOT_ALLOWED | Compare the owning API and first rejected value; it belongs to a neighboring checkpoint, not automatically to the same cause as NS_E_DATA_UNIT_EXTENSION_TOO_LARGE. |
NS_E_INVALID_EDL | Use object state and operation order to decide which code is authoritative when both appear in one trace in the unit extension too large diagnostic record. |
NS_E_CODEC_DMO_ERROR | Retain this result separately if it appears only after the NS_E_DATA_UNIT_EXTENSION_TOO_LARGE condition has cleared. |
A controlled media-format test
- Log
0xC00D0BD9,NS_E_DATA_UNIT_EXTENSION_TOO_LARGE, the exact operation and the first failure time at the unit extension too large checkpoint. - Preserve reader or writer object, stream and input numbers, profile identity, sample timestamps, buffer lengths and the first callback or SDK call that returned the code while tracing the unit extension too large path.
- Do not reuse a graph, session, reader or metadata object created before the relevant configuration or resource changed during a controlled unit extension too large retest.
- Perform one isolated test: open the same content with a minimal reader or writer configuration and add the disputed option only after the baseline succeeds for evidence about unit extension too large.
- 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 unit extension too large media-format check is fixed.
- Confirm the expected next state and retain any new HRESULT as a separate downstream result in the unit extension too large diagnostic record.
How to read the next HRESULT
| Retest result | Interpretation for NS_E_DATA_UNIT_EXTENSION_TOO_LARGE |
|---|---|
| The identical call still returns the code | The values governing the unit extension too large media-format check are unchanged, or the caller is still using an older object generation. |
| A fresh object succeeds | Lifetime or cached state contributed to NS_E_DATA_UNIT_EXTENSION_TOO_LARGE; correct object recreation instead of applying a machine-wide workaround at the unit extension too large checkpoint. |
| The call advances to another HRESULT | The the unit extension too large media-format check boundary was cleared. Diagnose the new code at its own format, graph, URL, network or metadata stage during a controlled unit extension too large retest. |
| Only one resource fails | The evidence favors content, URL, publishing point, stream, attribute or object-specific state rather than a global outage for evidence about unit extension too large. |
Misleading actions
- changing several profile and codec settings at once, which hides the first incompatible field before closing the unit extension too large incident.
- Do not erase the first
NS_E_DATA_UNIT_EXTENSION_TOO_LARGEoccurrence by repeatedly retrying; callbacks and reconnects can replace the useful state with a later wrapper error in the unit extension too large diagnostic record. - Do not publish credentials, protected-content material or complete private URLs when isolating the unit extension too large case. Record redacted identifiers, lengths, hashes and protocol fields needed to reproduce the unit extension too large media-format check.
Technical references
- Windows Media Format SDK overview
- Input, stream and output formats
- Profiles
- Windows Media SDK objects
- Sample extension types
- Microsoft HRESULT registry
Treat NS_E_DATA_UNIT_EXTENSION_TOO_LARGE as resolved only when the same API path crosses this checkpoint; success through a different player or cached copy is merely supporting evidence while tracing the unit extension too large path.
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