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NS_E_INVALID_OUTPUT_FORMAT
Diagnosing NS_E_INVALID_OUTPUT_FORMAT in the Windows Media pipeline
This result (0xC00D0BBB) is returned at the decoded or transformed output media type is not one the selected component can expose. It identifies the failing media-format operation, so troubleshooting should begin with the object and operation that own that checkpoint rather than with a broad player reset.
Windows Media Format separates the compressed stream profile from the raw input format and from the decoded output selected by a reader before retrying. 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 in the diagnostic record. In the case of this result, preserve the earliest lower-level result because wrappers can map several different causes to the same HRESULT when isolating this failure.
Where the failure occurs
At that format stage, the component has already accepted the earlier prerequisites but cannot cross the boundary described as the decoded or transformed output media type is not one the selected component can expose. That distinction matters: success in opening the file, resolving the host or creating a COM object does not prove that this later operation is valid.
The strongest reproduction is enumerate output formats from the reader or transform and request one advertised format without changing the source content during a controlled retest. If the same call advances after that single change, the evidence supports this boundary. If it does not, return to the first nested error rather than widening the repair before retrying.
Profile and sample evidence
| Capture | Why it matters |
|---|---|
| Owning call | Record the API method, object identity, thread or callback and timestamp for the reported boundary. |
| Decisive values | Profile XML or stream configuration, major type, subtype, format block, bitrate, channels, sample rate, frame dimensions and codec enumeration result when isolating this failure. |
| Object generation | Note when the reader, writer, graph, URL object, streaming session or metadata provider was created; stale state can reproduce this result after configuration has changed. |
| First nested result | Keep the earliest codec, COM, socket, DNS, parser or provider status before this result; later UI messages are less specific. |
| Comparison case | Use one known-good resource that exercises the same media-format check while changing only the rejected precondition. |
A controlled media-format test
- Log
0xC00D0BBB, it, the exact operation and the first failure time for this diagnosis. - Preserve profile XML or stream configuration, major type, subtype, format block, bitrate, channels, sample rate, frame dimensions and codec enumeration result before retrying.
- Do not reuse a graph, session, reader or metadata object created before the relevant configuration or resource changed in the diagnostic record.
- Perform one isolated test: enumerate output formats from the reader or transform and request one advertised format without changing the source content when isolating this failure.
- 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 operation is fixed.
- Confirm the expected next state and retain any new HRESULT as a separate downstream result.
How to read the next HRESULT
| Retest result | Interpretation |
|---|---|
| The identical call still returns the code | The values governing the original request are unchanged, or the caller is still using an older object generation. |
| A fresh object succeeds | Lifetime or cached state contributed to it; correct object recreation instead of applying a machine-wide workaround for this diagnosis. |
| The call advances to another HRESULT | the recorded format state boundary was cleared. Diagnose the new code at its own format, graph, URL, network or metadata stage in the diagnostic record. |
| Only one resource fails | The evidence favors content, URL, publishing point, stream, attribute or object-specific state rather than a global outage when isolating this failure. |
Nearby results are not interchangeable
Main distinction: an output-format rejection occurs after a source or codec exists; it is not evidence that the input file cannot be opened at this checkpoint.
| Nearby HRESULT | How to compare it |
|---|---|
NS_E_MSAUDIO_NOT_INSTALLED | the requested Microsoft audio encoder or decoder is not registered for the selected profile |
NS_E_UNEXPECTED_MSAUDIO_ERROR | The Microsoft audio codec was created but failed during configuration or sample processing |
NS_E_NOT_CONFIGURED | sample processing began before all mandatory codec or writer properties were committed |
Misleading actions
- Changing several profile and codec settings at once, which hides the first incompatible field before retrying.
- Do not erase the first occurrence by repeatedly retrying; callbacks and reconnects can replace the useful state with a later wrapper error in the diagnostic record.
- Do not publish credentials, protected-content material or complete private URLs when isolating this failure. Record redacted identifiers, lengths, hashes and protocol fields needed to reproduce the original boundary.
Technical references
- Windows Media Format SDK overview
- Input, stream and output formats
- Profiles
- Windows Media SDK objects
- Microsoft HRESULT registry
Close the incident only after the original the operation succeeds on a current object and the expected next state is observed.
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