VMAF is a perceptual video quality assessment algorithm developed by Netflix. VMAF Development Kit (VDK) is a software package that contains the VMAF algorithm implementation, as well as a set of tools that allows a user to train and test a custom VMAF model. Read [color=var(--color-text-link)]this techblog post for an overview, or [color=var(--color-text-link)]thispost for the latest updates and tips for best practices.