ROSI-LTS only: Main ROSI bundles FFmpeg; this guide applies to ROSI-LTS, which requires FFmpeg in your PATH.
FFmpeg 7 or newer is recommended. Older versions may work but are not supported.
Windows
Quickest option:
winget install ffmpeg
Or with Chocolatey: choco install ffmpeg-full
Verify: ffmpeg -version
macOS
brew install ffmpeg
Verify: ffmpeg -version
Linux
Debian / Ubuntu
sudo apt install ffmpeg -y
Fedora
sudo dnf install ffmpeg -y
Arch
sudo pacman -S ffmpeg -y
Verify on any distro: ffmpeg -version