Quality-target bitrate-ladder builder

A small, dependency-free (pure standard-library) Python tool that turns a grid of measured (resolution, bitrate, VMAF) points into a per-title, quality-driven bitrate ladder — the measurement side of per-title encoding. It builds the convex hull from the grid (at each bitrate, keep the resolution with the highest VMAF), sets the top rung as the lowest bitrate reaching a target score (default VMAF 95; the article's 93-95 band), spaces the lower rungs by a bitrate factor (default 1.66x, the Apple