This guide is ONLY necessary for users of StreamDiffusionTD
Check if ffmpeg is installed: 
ffmpeg -version
Installation: Windows
  1. Visit the ffmpeg download page
  2. Download the latest release build
  3. Extract to C:\ffmpeg
  4. Add C:\ffmpeg\bin to your system PATH
Mac FFMpeg Setup macOS 
# Using Homebrew
brew install ffmpeg

# Using MacPorts
sudo port install ffmpeg
Mac FFMpeg Setup Linux (Ubuntu/Debian) 
sudo apt update
sudo apt install ffmpeg