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NS_E_VIDEO_CODEC_ERROR
Investigating NS_E_VIDEO_CODEC_ERROR without losing the first failure
This result (0xC00D0BC5) marks an installed video codec failed during setup or sample processing. The code belongs to the failing media-format operation, which is why a later network, codec or metadata error must be recorded separately instead of replacing it.
Windows Media Format separates the compressed stream profile from the raw input format and from the decoded output selected by a reader. The writer then packetizes samples, applies attributes and optional data-unit extensions, so a failure in one stage does not prove that the ASF container itself is unreadable.
Where the failure occurs
At that format stage, the component has already accepted the earlier prerequisites but cannot cross the boundary described as an installed video codec failed during setup or sample processing. 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 feed a minimal known-good sample using the same negotiated media type and capture the first codec-specific failure before the SDK maps it. 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. |
| Values to record | Codec CLSID or subtype, installed binary version, selected input and output media types, first codec HRESULT and the sample timestamp where processing stopped. |
| 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
0xC00D0BC5, the exact operation and the first failure time. - Preserve codec CLSID or subtype, installed binary version, selected input and output media types, first codec HRESULT and the sample timestamp where processing stopped.
- Do not reuse a graph, session, reader or metadata object created before the relevant configuration or resource changed.
- Perform one isolated test: feed a minimal known-good sample using the same negotiated media type and capture the first codec-specific failure before the SDK maps it.
- 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 original request is fixed.
Nearby results are not interchangeable
Main distinction: It belongs to format, profile or sample processing, not merely to file-name or network resolution before retrying.
| Nearby HRESULT | How to compare it |
|---|---|
NS_E_AUDIO_CODEC_ERROR | An installed audio codec failed after selection rather than being absent |
NS_E_VIDEO_CODEC_NOT_INSTALLED | No installed video codec matches the requested compressed subtype |
NS_E_INVALIDPROFILE | the stream profile is internally inconsistent or cannot be accepted by the reader or writer |
Misleading actions
- Installing unrelated codec packs before preserving the actual codec CLSID and first internal failure.
- Record redacted identifiers, lengths, hashes and protocol fields needed to reproduce the recorded format state.
Technical references
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