Frame-type Sensitive RDO Control for Content-Adaptive-encoding

TL;DR

This paper introduces a frame-type sensitive rate-distortion control method for content-adaptive video encoding, significantly improving transcoding efficiency by optimizing keyframe parameters without quality loss.

Contribution

It proposes a novel approach to adjust the Lagrange multiplier based on frame type, achieving over 10 times better BD-Rate gains in content-adaptive transcoding.

Findings

Over 10× BD-Rate gains without quality loss

Effective Lagrange multiplier adjustment for keyframes

Enhanced content-adaptive transcoding efficiency

Abstract

Video transcoding is an increasingly important application in the streaming media industry. It has become important to investigate the optimisation of transcoder parameters for a single clip simply because of the immense number of playbacks for popular clips. In this paper, we explore the use of a canned optimiser to estimate the optimal RD tradeoff achievable for a particular clip. We show that by adjusting the Lagrange multiplier in RD optimisation on keyframes alone we can achieve more than 10$\times$ the previous BD-Rate gains possible without affecting quality for any operating point.