Interpretation of objective video quality metrics

> "VMAF shows research-proven high correlation between the metric and the human perception of the image."

From "Who Has the Best Hardware AV1 Encoder?" (https://giannirosato.com/blog/post/nvenc-v-qsv/): "Everyone's favorite bad, obsolete, easily tricked metric is VMAF, which was good for a time but simply isn't good anymore."

Ever-increasing competition for each user challenges streaming platforms, broadcasters and operators to strive for the highest achievable video quality on all types of devices. To meet this goal many of them use various quality control systems based on objective metrics. PSNR, SSIM, and VMAF proved to be most widely used and in-demand metrics as shown by rich communication experience with clients in the video quality control filed.