Install FFmpeg with homebrew. You'll need to install it with a couple flags for webm and the AAC audio codec.
brew install ffmpeg --with-libvpx --with-libvorbis --with-fdk-aac --with-opus
ACTIVE_ATTRIBUTES: 35721 | |
ACTIVE_ATTRIBUTE_MAX_LENGTH: 35722 | |
ACTIVE_TEXTURE: 34016 | |
ACTIVE_UNIFORMS: 35718 | |
ACTIVE_UNIFORM_MAX_LENGTH: 35719 | |
ALIASED_LINE_WIDTH_RANGE: 33902 | |
ALIASED_POINT_SIZE_RANGE: 33901 | |
ALPHA: 6406 | |
ALPHA_BITS: 3413 | |
ALWAYS: 519 |
mkdir emacs | |
cd emacs | |
git init | |
git remote add origin https://github.com/emacs-mirror/emacs.git | |
git fetch --depth 1 origin emacs-26 | |
git reset --hard FETCH_HEAD | |
sudo apt install autoconf make gcc texinfo libgtk-3-dev libxpm-dev libjpeg-dev libgif-dev libtiff5-dev libgnutls-dev libncurses5-dev | |
./configure | |
make | |
sudo make install |