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NS_E_DVD_NO_DECODER
Practical scope of NS_E_DVD_NO_DECODER
This HRESULT is produced at locating compatible MPEG-2/DVD decoders required to build the graph. This result belongs to dvd navigator, decoder graph and protection policy, not to an undifferentiated “Windows Media problem.”
Pipeline position
At the checkpoint, dVD playback is built around the DirectShow DVD Navigator, which parses DVD-Video navigation data and exposes separate video, audio and subpicture outputs; Decoder availability, title-domain state, region policy, parental level and copy-protection negotiation are independent checkpoints. The page-specific boundary is locating compatible MPEG-2/DVD decoders required to build the graph.
Successful reading of files from the DVD volume does not prove that the navigation program, decoder graph or protected output path can be used. In a typical failing run, the navigator exposes streams but no decoder accepts the required MPEG-2 types.
Reproduction record
| Evidence | Why it matters for no decoder |
|---|---|
| Producing object and operation | disc path and media generation, DVD domain, title/chapter, region values for disc/drive/decoder, selected audio/video/subpicture streams, decoder CLSIDs, renderer and display mode, protection negotiation result and first DirectShow HRESULT |
| Decisive observation | installed decoder CLSIDs, stream media types, activation results and merit/selection |
| Generation identity | Record the same disc, device, job or Player operation generation that returned this result; a reconnect or media change creates a different test. |
| Underlying result | Keep the first device, filesystem, COM, codec, DirectShow, IMAPI or BITS result seen before the Player mapped it to this result. |
| Controlled comparison | Repeat the producing call after changing only this condition: install or enable a compatible licensed DVD decoder. |
Reading the evidence
| Observation | Interpretation |
|---|---|
| The recorded values match the boundary | The result is consistent with locating compatible MPEG-2/DVD decoders required to build the graph; correct that state before changing unrelated codecs, drivers or playlists. |
| A lower layer failed before this result | Preserve that earlier HRESULT or device result because it may be only the Player-level mapping. |
| The same call passes after one isolated change | The comparison supports the no decoder diagnosis rather than a broad installation failure. |
| The code changes after retesting it | The boundary was passed; diagnose the new HRESULT as the next independent stage. |
It scopes the failure to locating compatible MPEG-2/DVD decoders required to build the graph.
Verification procedure
- Capture
0xC00D116D, it, the exact Player/API operation and the first timestamp at which it appears. - Save installed decoder CLSIDs, stream media types, activation results and merit/selection; do this before ejecting media, reconnecting a device, canceling a job or rebuilding the Player object.
- correlate the result with disc path and media generation, DVD domain, title/chapter, region values for disc/drive/decoder, selected audio/video/subpicture streams, decoder CLSIDs, renderer and display mode, protection negotiation result and first DirectShow HRESULT.
- Reproduce once with the original source and destination, then apply only this change: install or enable a compatible licensed DVD decoder.
- Create a fresh operation generation and verify that the original call advances beyond the no decoder boundary.
Results that may look similar
| Related result | Different diagnostic boundary |
|---|---|
NS_E_DVD_GRAPH_BUILDING | issuing a DVD operation before the playback graph has completed construction |
NS_E_DVD_PARENTAL | applying the configured parental level to the current DVD title or scene |
NS_E_DVD_CANNOT_JUMP | executing a title/chapter/menu jump allowed in the current DVD domain |
Change the smallest responsible condition
The targeted action is to install or enable a compatible licensed DVD decoder. While retesting it, keep unrelated media, device, playlist and network values unchanged.
When verifying it, do not bypass region or copy-protection checks; Diagnose the supported playback path by preserving the exact disc, drive, decoder and display connection involved.
References
- DVD decoder support in Windows.
- DirectShow filters and DVD Navigator.
- DirectShow DVD error and success codes.
- IDvdControl2 interface.
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