viser-ladder

Bitrate ladder selection with crossover enforcement — picks the best N rungs from a convex hull.

Key Types

• Ladder — ordered rungs with bitrate_range(), quality_range(), savings() methods
• Rung — a single ladder step (point + index)
• FixedLadder — non-optimized ladder for baseline comparison

Key Functions

• select(hull, opts) — picks optimal rungs using greedy VMAF-target selection
• netflix_old() / apple_hls() — pre-built standard ladder presets