Re: [PATCH 0/6] MR5931: winegstreamer: Implement output type functions.

[Rémi Bernon (＠rbernon)]

Rémi Bernon (@rbernon) commented about dlls/mf/tests/transform.c:
>      ATTR_GUID(MF_MT_SUBTYPE, MFVideoFormat_NV12, .required = TRUE),
>      ATTR_RATIO(MF_MT_FRAME_RATE, 30000, 1001, .required = TRUE),
>      ATTR_RATIO(MF_MT_FRAME_SIZE, actual_width, actual_height, .required = TRUE),
> -
>    ATTR_UINT32(test_attr_guid, 0),

I'm not sure to understand what this attribute is here for?