MF_MT_ALPHA_MODE attribute

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Specifies whether the alpha mode for color media video types is premultiplied or straight.

Data type

UINT32

Remarks

This value can be cast to a DXGI_ALPHA_MODE value. If this attribute isn’t present, for backward compatibility, the value is DXGI_ALPHA_MODE_STRAIGHT for video format supporting alpha channel, such as ARGB32, or DXGI_ALPHA_MODE_IGNORE for video format without alpha channel, such as RGB32.

Requirements