\documentclass[aspectratio=43]{beamer}

\usetheme{Berkeley}
\usecolortheme{seahorse}

\setbeamercovered{transparent}
\beamertemplatenavigationsymbolsempty
\addtobeamertemplate{navigation symbols}{}{
\color{black}\normalsize\textbf\insertframenumber}
\newcommand{\img}[2]{\includegraphics[#1]{images/#2}}
\newcommand{\imgbig}[1]{\img{height=16em}{#1}}
\newcommand{\imgwide}[1]{\img{height=12em}{#1}}

\def\hi{SVM}
\def\lo{Machine à Vecteurs de Support}
\def\bititle{\hi, \lo}
\logo{\includegraphics[height=7.5em]{../cnam}}
\title[\hi]{\hi}
\subtitle{\lo}
\author[M. Beninca]{Marc Beninca}
\institute[CNAM]{Conservatoire National des Arts et Métiers}
\date[Probatoire 2020]{Oral probatoire\\Mercredi 16 Septembre 2020}

\hypersetup{colorlinks,linkcolor=blue,urlcolor=blue}
\usepackage{fontspec}
\setmainfont{DejaVu Sans}\setmonofont{DejaVu Sans Mono}
\usepackage{multicol}