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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.
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.
A focused reproduction is to enumerate output formats from the reader or transform and request one advertised format without changing the source content. If the same call gets past this point after that single change, the changed precondition is relevant. If it does not, return to the first nested error instead of broadening the repair.
Profile and sample evidence
| Capture | Why it matters |
|---|---|
| Owning call | Record the API method, object identity, thread or callback and timestamp for the reported condition. |
| Values to record | Profile XML or stream configuration, major type, subtype, format block, bitrate, channels, sample rate, frame dimensions and codec enumeration result. |
| 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, the exact operation and the first failure time. - Preserve profile XML or stream configuration, major type, subtype, format block, bitrate, channels, sample rate, frame dimensions and codec enumeration result before retrying.
- Perform one isolated test: enumerate output formats from the reader or transform and request one advertised format without changing the source content.
- 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.
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.
| 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.
- Record redacted identifiers, lengths, hashes and protocol fields needed to reproduce the original failure.
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 operation succeeds on a current object and the expected next state is observed.
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