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MF_E_QUALITYKNOB_WAIT_LONGER
Read this as a state transition
MF_E_QUALITYKNOB_WAIT_LONGER means the quality manager deliberately postpones raising quality because recent playback evidence is not yet stable.
The result comes from the quality-management policy evaluating whether to increase quality level. A representative case is after congestion subsides, the manager waits for sustained headroom before re-enabling a more expensive processing mode.
Evidence to preserve
current quality level, dropped and late frames, clock rate, sample queue depth, last transition time, power mode, and requested quality change.
Record before the object changes
Test one hypothesis at a time
- Record and verify: current quality level, dropped and late frames, clock rate, sample queue depth, last transition time, power mode, and requested quality change.
- Run the controlled comparison: hold workload constant and observe the next quality decision after the documented stabilization interval.
Do not merge these HRESULTs
| HRESULT | Meaning in the standard description |
|---|---|
MF_E_ALLOCATOR_NOT_INITIALIZED | Memory allocator is not initialized. |
MF_E_ALLOCATOR_NOT_COMMITED | Memory allocator is not committed yet. |
MF_E_ALLOCATOR_ALREADY_COMMITED | Memory allocator has already been committed. |
Here, a stream error or hardware failure stops processing, whereas it is a temporary quality-policy decision.
Confirm the correction
For this occurrence, allow the quality manager hysteresis to run; do not force rapid up/down oscillation in response to one sample.
Authoritative references
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