HRESULT 0xC00D6D69: meaning and diagnosis

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The transform property array has an unexpected number of SAFEARRAY dimensions.

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MF_E_TRANSFORM_PROPERTY_NOT_WRITEABLE	MF_E_TRANSFORM_PROPERTY_VALUE_SIZE_WRONG

MF_E_TRANSFORM_PROPERTY_ARRAY_VALUE_WRONG_NUM_DIM

MF_E_TRANSFORM_PROPERTY_ARRAY_VALUE_WRONG_NUM_DIM is an array-shape error in transform property data. The property accepts an array form, but the supplied array has a different number of dimensions than the transform expects.

Inspect the SAFEARRAY descriptor, not only the element count

Record VARIANT.vt and confirm that the array flag and element type match the property's documented contract.
Use SafeArrayGetDim to log the number of dimensions and SafeArrayGetLBound/SafeArrayGetUBound for each dimension.
Compare the dimensions with the exact codec property documentation or with a value returned by the same transform.

A one-dimensional array containing the same total number of elements is not equivalent to a two-dimensional matrix. Reallocating more bytes does not repair the array descriptor. This distinction is especially important for matrix-like audio or transform configuration properties.

Microsoft: SAFEARRAY inspection functions · Microsoft: ICodecAPI property values · Wine: transform property errors

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