HRESULT 0xC00D36E9 (MF_E_PROPERTY_EMPTY): meaning and diagnosis

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Description:

the property is present but its current value is empty where a value is required.

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MF_E_PROPERTY_TYPE_NOT_SUPPORTED	MF_E_PROPERTY_NOT_EMPTY

MF_E_PROPERTY_EMPTY

MF_E_PROPERTY_EMPTY describes a different condition from MF_E_PROPERTY_NOT_FOUND. The property slot or metadata concept exists, but the value supplied or retrieved is empty in a context that requires actual data.

Inspect both presence and value shape

Log the property identifier and PROPVARIANT.vt. VT_EMPTY is an explicit PROPVARIANT state.
For strings and vectors, also record string length or element count; a non-VT_EMPTY value can still contain no useful elements.
Check whether the API expects deletion of an optional property instead of storing an empty placeholder.

Media Foundation's GetAllPropertyNames illustrates the distinction clearly: it returns VT_EMPTY when no properties are available, otherwise a VT_VECTOR | VT_LPWSTR list. Do not map every empty state to “missing file” or “missing codec”; trace the exact metadata/property operation and value.

Microsoft: IMFMetadata::GetAllPropertyNames · Microsoft: PROPVARIANT · Wine: property HRESULT definitions

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