and 录音等+live等
录音
https://www.cnblogs.com/sowhat4999/p/4439837.html
live实时
https://hub.fastgit.org/ImSjt/liveRtspServer
提取视频
ffmpeg -i 2018.mp4 -codec copy -bsf: h264_mp4toannexb -f h264 tmp.264
https://www.latelee.org/my-study/live555-simple-example.html