| Previous | Next |
| NS_E_WMP_IMAPI_DEVICE_BUSY | NS_E_WMP_SERVER_UNAVAILABLE |
NS_E_WMP_IMAPI_LOSS_OF_STREAMING
Failure boundary and ownership
NS_E_WMP_IMAPI_LOSS_OF_STREAMING with value 0xC00D11AF records feeding the recorder slowly enough that its write buffer underruns. The producing call and its state are more diagnostic than a later aggregate Player failure.
Underlying mechanism
At the checkpoint, windows Media Player builds a burn playlist, refreshes its calculated status and delegates physical recording or erase work to the optical-disc stack; The recorder, inserted medium, burn format, staging files and write engine each have a separate lifecycle. The page-specific boundary is feeding the recorder slowly enough that its write buffer underruns.
A recorder that enumerates can still be busy, incompatible with the inserted medium or unable to sustain the selected write operation. The condition can be reproduced when network-backed source files cannot supply sectors at the selected recording speed.
Trace fields worth keeping
| Evidence | Why it matters for imapi loss of streaming |
|---|---|
| Producing object and operation | recorder unique ID and exclusive-access owner, inserted media profile/state, burn format, playlist item, source locality, duration/byte estimate, staging directory free space, write speed, current IMAPI action and underlying HRESULT |
| Decisive observation | write speed, source/staging location, buffer progress, system I/O load and IMAPI write action |
| 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: stage sources locally, reduce write speed or enable supported underrun protection. |
What the comparison proves
| Observation | Interpretation |
|---|---|
| The recorded values match the boundary | The result is consistent with feeding the recorder slowly enough that its write buffer underruns; 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 this result may be only the Player-level mapping. |
| The same call passes after one isolated change | The comparison supports the imapi loss of streaming 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 feeding the recorder slowly enough that its write buffer underruns.
Decision path
- Capture
0xC00D11AF, it, the exact Player/API operation and the first timestamp at which it appears. - Save write speed, source/staging location, buffer progress, system I/O load and IMAPI write action; do this before ejecting media, reconnecting a device, canceling a job or rebuilding the Player object.
- correlate the result with recorder unique ID and exclusive-access owner, inserted media profile/state, burn format, playlist item, source locality, duration/byte estimate, staging directory free space, write speed, current IMAPI action and underlying HRESULT.
- Reproduce once with the original source and destination, then apply only this change: stage sources locally, reduce write speed or enable supported underrun protection.
- Create a fresh operation generation and verify that the original call advances beyond the imapi loss of streaming boundary.
Close alternatives
| Related result | Different diagnostic boundary |
|---|---|
NS_E_WMP_IMAPI_DEVICE_BUSY | acquiring the recorder while another operation or process owns it |
NS_E_WMP_IMAPI_DEVICE_INVALIDTYPE | binding a recording operation to a device that does not support the required recorder profile |
NS_E_WMP_IMAPI_DEVICE_NOTPRESENT | opening the recorder after it was removed or its device path changed |
Safe correction
Correct this boundary by making sure you stage sources locally, reduce write speed or enable supported underrun protection. Then reacquire the interface or media state that produced it and repeat that call.
When verifying it, do not repeatedly start a new burn against a drive that still owns or finalizes the previous session; Capture the media state and recorder owner before ejecting or replacing the disc.
Source material
- About CD Burning.
- IWMPCdromBurn interface.
- Image Mastering API interfaces and media states.
- Checking recorder and media support.
- IDiscRecorder2::AcquireExclusiveAccess.
Looking for a different code? Search another status or error code.