  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.
