Introduction - If you have any usage issues, please Google them yourself
// RGB-> YCbCr
// Y = Coef. for red*Red+Coef. for green*Green+Coef. for blue*Blue
// Cb = (Blue-Y)/(2-2*Coef. for blue)
// Cr = (Red-Y)/(2-2*Coef. for red)
// YCbCr-> RGB
// Red = Cr*(2-2*Coef. for red)+Y
// Green = (Y-Coef. for blue*Blue-Coef. for red*Red)/Coef. for green
// Blue = Cb*(2-2*Coef. for blue)+Y