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MFVideoChromaSubsampling enumeration (mfobjects.h)

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Contains flags that define the chroma encoding scheme for Y'Cb'Cr' data.

Syntax

typedef enum _MFVideoChromaSubsampling {
  MFVideoChromaSubsampling_Unknown = 0,
  MFVideoChromaSubsampling_ProgressiveChroma = 0x8,
  MFVideoChromaSubsampling_Horizontally_Cosited = 0x4,
  MFVideoChromaSubsampling_Vertically_Cosited = 0x2,
  MFVideoChromaSubsampling_Vertically_AlignedChromaPlanes = 0x1,
  MFVideoChromaSubsampling_MPEG2,
  MFVideoChromaSubsampling_MPEG1,
  MFVideoChromaSubsampling_DV_PAL,
  MFVideoChromaSubsampling_Cosited,
  MFVideoChromaSubsampling_Last,
  MFVideoChromaSubsampling_ForceDWORD = 0x7fffffff
} MFVideoChromaSubsampling;

Constants

 
MFVideoChromaSubsampling_Unknown
Value: 0
Unknown encoding scheme.
MFVideoChromaSubsampling_ProgressiveChroma
Value: 0x8
Chroma should be reconstructed as if the underlying video was progressive content, rather than skipping fields or applying chroma filtering to minimize artifacts from reconstructing 4:2:0 interlaced chroma.
MFVideoChromaSubsampling_Horizontally_Cosited
Value: 0x4
Chroma samples are aligned horizontally with the luma samples, or with multiples of the luma samples. If this flag is not set, chroma samples are located 1/2 pixel to the right of the corresponding luma sample.
MFVideoChromaSubsampling_Vertically_Cosited
Value: 0x2
Chroma samples are aligned vertically with the luma samples, or with multiples of the luma samples. If this flag is not set, chroma samples are located 1/2 pixel down from the corresponding luma sample.
MFVideoChromaSubsampling_Vertically_AlignedChromaPlanes
Value: 0x1
The U and V planes are aligned vertically. If this flag is not set, the chroma planes are assumed to be out of phase by 1/2 chroma sample, alternating between a line of U followed by a line of V.
MFVideoChromaSubsampling_MPEG2
Specifies the chroma encoding scheme for MPEG-2 video. Chroma samples are aligned horizontally with the luma samples, but are not aligned vertically. The U and V planes are aligned vertically.
MFVideoChromaSubsampling_MPEG1
Specifies the chroma encoding scheme for MPEG-1 video.
MFVideoChromaSubsampling_DV_PAL
Specifies the chroma encoding scheme for PAL DV video.
MFVideoChromaSubsampling_Cosited
Chroma samples are aligned vertically and horizontally with the luma samples. YUV formats such as 4:4:4, 4:2:2, and 4:1:1 are always cosited in both directions and should use this flag.
MFVideoChromaSubsampling_Last
Reserved.
MFVideoChromaSubsampling_ForceDWORD
Value: 0x7fffffff
Reserved. This member forces the enumeration type to compile as a DWORD value.

Remarks

These flags are used with the MF_MT_VIDEO_CHROMA_SITING attribute.

For more information about these values, see the remarks for the DXVA2_VideoChromaSubSampling enumeration, which is the DirectX Video Acceleration (DXVA) equivalent of this enumeration.

Requirements

Requirement Value
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2008 [desktop apps only]
Header mfobjects.h (include Mfidl.h)

See also

Extended Color Information

Media Foundation Enumerations

Video Media Types