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VFW_E_DVD_WRONG_SPEED
Meaning
Windows documents VFW_E_DVD_WRONG_SPEED as “The operation cannot be performed at the current playback speed”. Here, the requested DVD operation is unavailable at the current forward or reverse playback speed.
Evidence worth preserving
- Evidence 1: current playback rate and direction.
- Evidence 2: requested IDvdControl2 method.
- Evidence 3: EC_DVD_PLAYBACK_RATE_CHANGE and completion events.
Relevant contract
Code-specific boundary: VFW_E_DVD_WRONG_SPEED narrows the investigation to the playback or scan speed requested from the navigator and the rates allowed in the current domain. Preserve the DVD domain, title/menu location and graph topology from the same attempt so a later navigation error is not mistaken for the original condition.
Start with the DVD Navigator, graph builder, decoder inventory and renderer topology.
Conditions that can produce it
- Cause 1: frame-accurate or menu operation is attempted during scan mode.
- Cause 2: the disc or decoder does not support the command at the selected rate.
- Cause 3: the application issues the command before the rate-change event settles.
Correction strategy
- Action 1: return to a supported rate before issuing the command.
- Action 2: disable incompatible controls during scan modes.
- Action 3: wait for rate transitions to complete before navigation.
Example incident
A player allows chapter navigation while scanning backward at high speed; returning to 1× before navigation prevents it.
Retry and recovery
Retry rule: Retry after playback reaches a supported speed, commonly normal rate.
How it differs from nearby results
VFW_E_DVD_OPERATION_INHIBITED is an authored prohibition, whereas it is a playback-rate constraint.
Official Microsoft references
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