FFMPEG_VIDEO

说明：  Linux下利用ffmpeg采集rtsp视频流，录制成文件，可以播放，Windows下把代码拷出来自己跑，Linux下要链接so文件哈。。。
(Linux platform, use ffmpeg to collect RTSP video stream, recorded as a file, it can play, Windows copy the code and run in your project, Linux need link "so" file.)