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VFW_E_VMR_NO_PROCAMP_HW
Meaning
Windows documents VFW_E_VMR_NO_PROCAMP_HW as “The VMR could not find any ProcAmp hardware on the current display device”. Here, the VMR cannot expose requested hardware ProcAmp controls such as brightness, contrast, hue or saturation on the current display path.
Relevant contract
Start with the renderer, graphics driver, display connection and negotiated surfaces.
Evidence worth preserving
Record lengths and hashes instead of raw content when the incident includes display identifiers, protected-content state, driver details and media paths.
- Evidence 1: requested ProcAmp property and value.
- Evidence 2: capability range and flags returned by the VMR.
- Evidence 3: adapter, driver, renderer mode and input format.
Conditions that can produce it
- Cause 1: the graphics driver provides no ProcAmp support.
- Cause 2: the selected control is not supported for the active format.
- Cause 3: hardware acceleration is unavailable in the current session.
Retry and recovery
Retry rule: Retry after switching to a path that advertises the requested ProcAmp capability.
Correction strategy
- Action 1: enable only controls reported by capability queries.
- Action 2: use shader or software processing when appropriate.
- Action 3: reset UI ranges when renderer or adapter changes.
Example incident
A settings panel enables hue adjustment for every adapter, but the active VMR path reports no hue control; capability-driven UI prevents it.
How it differs from nearby results
VFW_E_VMR_NO_DEINTERLACE_HW concerns interlaced-video processing, while it concerns image-adjustment controls.
Official Microsoft references
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