说明：  FFmpeg是一个开源免费跨平台的视频和音频流方案，属于自由软件，采用LGPL或GPL许可证（依据你选择的组件）。它提供了录制、转换以及流化音视频的完整解决方案。它包含了非常先进的音频/视频编解码库libavcodec，为了保证高可移植性和编解码质量，libavcodec里很多codec都是从头开发的。
(FFmpeg is a free open source cross-platform video and audio streaming program is free software, the use of LGPL or GPL licenses (according to your choice of components). It provides a recording, streaming audio and video conversion and complete solution. It contains a very advanced audio/video codec library libavcodec, in order to ensure portability and high quality codec, libavcodec codec is in a lot of development from scratch.)