FFmpeg is a free and open-source software project consisting of a large suite of libraries and programs for handling video, audio, and other multimedia files and streams. At its core is the FFmpeg program itself, designed for command-line-based processing of video and audio files. Learn more : https://ffmpeg.org , https://en.wikipedia.org/wiki/FFmpeg So, how to get it for Windows ?
This includes downloading FFmpeg for both 32 bit Windows and 64 bit Windows.