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eAVEncVideoColorTransferFunction enumeration (codecapi.h)

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[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

Specifies the conversion function from R'G'B' to RGB. This enumeration is used with the AVEncVideoInputColorTransferFunction and AVEncVideoOutputColorTransferFunction properties.

Syntax

typedef enum eAVEncVideoColorTransferFunction {
  eAVEncVideoColorTransferFunction_SameAsSource = 0,
  eAVEncVideoColorTransferFunction_10 = 1,
  eAVEncVideoColorTransferFunction_18 = 2,
  eAVEncVideoColorTransferFunction_20 = 3,
  eAVEncVideoColorTransferFunction_22 = 4,
  eAVEncVideoColorTransferFunction_22_709 = 5,
  eAVEncVideoColorTransferFunction_22_240M = 6,
  eAVEncVideoColorTransferFunction_22_8bit_sRGB = 7,
  eAVEncVideoColorTransferFunction_28 = 8
} ;

Constants

 
eAVEncVideoColorTransferFunction_SameAsSource
Value: 0
Use the same function as the input video. This flag applies to the AVEncVideoOutputColorTransferFunction property only.
eAVEncVideoColorTransferFunction_10
Value: 1
Linear RGB (gamma = 1.0).
eAVEncVideoColorTransferFunction_18
Value: 2
True 1.8 gamma. L' = L^1/1.8.
eAVEncVideoColorTransferFunction_20
Value: 3
True 2.0 gamma. L' = L^1/2.0..
eAVEncVideoColorTransferFunction_22
Value: 4
True 2.2 gamma. L' = L^1/2.2..
eAVEncVideoColorTransferFunction_22_709
Value: 5
Gamma 2.2 curve with a linear segment in the lower range. L' = 4.5L, for L < 0.018; L' = 1.099L^0.45.- 0.099, for L >= 0.018. This transfer function is used in BT-709, SMPTE 296M, SMPTE 170M, BT-470, and SPMTE 274M.
eAVEncVideoColorTransferFunction_22_240M
Value: 6
Gamma 2.2 curve with a linear segment in the lower range. L' = 4.0L, for L < 0.0228; L' = 1.1115^L0.45.- 0.01115, for L >= 0.0228. This transfer function is used in SPMTE 240M.
eAVEncVideoColorTransferFunction_22_8bit_sRGB
Value: 7
Gamma 2.4 curve with a linear segment in the lower range. L' = L/12.92, for L < 0.03928; L' = ((L + 0.055) / 1.055)^2.4., for L >= 0.03928.
eAVEncVideoColorTransferFunction_28
Value: 8
True 2.8 gamma. L' = L^1/2.8..

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps | UWP apps]
Minimum supported server Windows 2000 Server [desktop apps | UWP apps]
Header codecapi.h

See also

Codec API Enumerations

ICodecAPI Interface