HRESULT 0xC00D36EC (MF_E_PROPERTY_VECTOR

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Description:

the property requires a multivalued VT_VECTOR PROPVARIANT but received a scalar value.

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MF_E_PROPERTY_VECTOR_NOT_ALLOWED	MF_E_OPERATION_CANCELLED

MF_E_PROPERTY_VECTOR_REQUIRED

MF_E_PROPERTY_VECTOR_REQUIRED is the opposite cardinality error to MF_E_PROPERTY_VECTOR_NOT_ALLOWED. The property is defined as multivalued, but the supplied PROPVARIANT contains a scalar value.

Build the PROPVARIANT as a real vector

Verify the element type required by the property, then combine it with VT_VECTOR.
Set the vector element count and element pointer consistently; an empty or malformed vector is a different problem.
Use PropVariantClear for values returned or allocated through property APIs according to the API's ownership contract.

IMFMetadata::GetAllPropertyNames is a concrete Media Foundation example of a vector result: when names exist, the type is VT_VECTOR | VT_LPWSTR. Windows property descriptions likewise mark multivalued properties and expose them as vectors. Converting a required vector to one formatted string changes the data model and is not an equivalent fix.

Microsoft: vector metadata names · Microsoft: multipleValues property schema · Wine: property HRESULT definitions

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