FFmpeg: Free, Open-Source Multimedia Library & Tools

FFmpeg is a free and open-source software project that provides a collection of libraries and tools for handling multimedia data. It can be used to record, convert and stream audio and video files, and it supports a wide range of formats and codecs.

FFmpeg is used by many media players, streaming services, and video editing software. It is also frequently used by developers to build custom multimedia applications.

FFmpeg is available for Windows, Linux, and macOS, and it can be downloaded from the official website. The software is released under the GNU Lesser General Public License.