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NS_S_TRANSCRYPTOR_EOF
Windows Media transcryptor reached end of file
NS_S_TRANSCRYPTOR_EOF is HRESULT 855003 (0x000D0BDB) from Windows Media. The documented description is “The transcryptor object has reached end of file.” The severity bit indicates a nonfailure result, but the value carries a specific condition that must not be collapsed into plain S_OK.
In the legacy Windows Media pipeline or Player state, this result means that the transcryptor object has reached end of file. Before reporting completion, the caller must reconcile the code-specific state transition and every usable output.
Where the status is encountered
- Windows Media source, reader, writer, or renderer callbacks; log the exact method and object state instead of interpreting the constant outside that contract.
- Windows Media Player SDK automation; log the exact method and object state instead of interpreting the constant outside that contract.
- Media graph, playlist, image, rights, or buffering state; log the exact method and object state instead of interpreting the constant outside that contract.
What must be true before accepting it
Verify that all transformed output before EOF was committed and the pipeline stops without requesting nonexistent input. Without that proof, it can mask a caller error even though HRESULT failure severity is not set.
Reconcile side effects associated with it before compensation or a second invocation is attempted.
Evidence to preserve
- Preserve input and output asset identity.
- Preserve sample and byte counts.
- Preserve last timestamp.
- Preserve expected duration.
- Preserve final cryptographic or container flush.
Correct handling and recovery
Flush final transformed blocks, close output securely, and verify expected item or duration counts. Treat early EOF as a separate integrity issue when counts do not match.
Difference from nearby results
Correctly separating it from neighboring values selects the proper continuation and cleanup path.
Practical scenario
A protected-media migration reaches EOF after every expected sample. The transcryptor flushes its final block and verifies the output duration before closing.
References
- Microsoft: Windows Media Format SDK error codes — official Microsoft material relevant to this HRESULT.
- Microsoft: Windows Media Player SDK
- Microsoft: Windows Media Player buffering event
- Microsoft: HRESULT values
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