FFmpeg introduced, download, description
FFmpeg是领先的多媒体框架，提供了音视频的编码，解码，转码，封装，解封装，流，滤镜(滤波器)，播放等功能。
它几乎支持所有的音视频格式，不管是标准委员会，社区，还是公司设计的。
它是高度可移植，跨平台的：可以在Linux, Mac OS X, Microsoft Windows, the BSDs, Solaris等系统上，
在各种不同的编译环境，机器架构，配置下编译，运行，并通过测试。
FFmpeg is an open source project itself, and released under the LGPL / GPL agreement, so anyone can freely use, as long as comply with LGPL / GPL agreement.
FFmpeg's official website is www.ffmpeg.org .
1. Download the Windows version of FFmpeg build the package, enter https://ffmpeg.zeranoe.com/builds/
select the version [4.2.1] -> System Architecture [Wndow 64-bit], then download the [Shared] + [Dev] (also can shove).
2, unzip downloaded to introduce some of them now:
ffmpeg_dev：包含example例子、include头文件、lib静态链接库。
ffmpeg_shared：包含bin动态库、doc文档、presets不清楚。
并且在 ffmpeg_shared/bin 下提供了三个命令行工具：
ffmpeg.exe：视频转换工具。
ffplay.exe：视频播放工具。
ffprobe.exe：视频分析工具。
Qt + the Visual Studio development environment configuration
Change project Properties:
1, C / C ++ -> General
-> Accessories directory containing: all .h folder added ffmpeg of the include;
2, Linker -> General
-> Additional Library Directories: Add ffmpeg lib folder directory
3 connector -> input
-> additional dependencies: All .lib file on the ffmpeg
example:
F:\vs2013_projects\MyffMpeg\MyffMpeg\ffmpeg\lib\avcodec.lib
F:\vs2013_projects\MyffMpeg\MyffMpeg\ffmpeg\lib\avdevice.lib
F:\vs2013_projects\MyffMpeg\MyffMpeg\ffmpeg\lib\avfilter.lib
F:\vs2013_projects\MyffMpeg\MyffMpeg\ffmpeg\lib\avformat.lib
F:\vs2013_projects\MyffMpeg\MyffMpeg\ffmpeg\lib\avutil.lib
F:\vs2013_projects\MyffMpeg\MyffMpeg\ffmpeg\lib\postproc.lib
F:\vs2013_projects\MyffMpeg\MyffMpeg\ffmpeg\lib\swresample.lib
F:\vs2013_projects\MyffMpeg\MyffMpeg\ffmpeg\lib\swscale.lib
4, in debug / release the generated folder .exe, .dll file dll Copy all files all incoming bin ffmpeg clip.
