以下是 eAVEncVideoColorTransferFunction 枚举的定义：
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,
eAVEncVideoColorTransferFunction_28_709 = 9,
eAVEncVideoColorTransferFunction_28_240M = 10,
eAVEncVideoColorTransferFunction_28_8bit_sRGB = 11
} eAVEncVideoColorTransferFunction;
这个枚举定义了多种不同的颜色传输函数设置：
- eAVEncVideoColorTransferFunction_SameAsSource: 颜色传输函数与源相同。使用源视频的颜色传输函数设置。
- eAVEncVideoColorTransferFunction_10 到 eAVEncVideoColorTransferFunction_22_8bit_sRGB: 这些值表示不同的颜色传输函数，包括 ITU-R BT.709、ITU-R BT.240M、sRGB 等。
通过调整颜色传输函数设置，可以影响视频的亮度表现。选择适当的颜色传输函数取决于您的应用需求和视频源的特性。
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