Module rate_distortion 

Rate-distortion analysis for optimal encoding parameter selection.

Models the trade-off between bitrate and quality to help select the best CRF, QP, or bitrate for a given quality target. Provides RD-curve fitting, operating point selection, and Bjontegaard-delta (BD-rate) comparison.

Structs

RdCurve

An RD curve consisting of multiple measurement points.

RdPoint

A single rate-distortion measurement point.

Enums

QualityMetric

Quality metric type used in the analysis.

Functions

average_quality_delta

Compute the average quality difference between two RD curves over their overlapping bitrate range (simplified BD-rate style comparison). Positive means curve_b has higher quality at the same bitrate.

efficiency

Compute the efficiency of a point as quality per kbps.