docker常用命令
docker-compose --env-file env up -d
docker build -t="web:dev" .
docker build -t="master:dev" .
docker-compose up -d
docker logs --tail=500 19426d6a66da
docker exec -it 2bb78833dd9b /bin/bash

apt-get update && apt install ffmpeg -y && apt install tree -y
docker compose里面的语句：
RUN apt-get update && apt-get -y install expect vim lrzsz

查看视频时长的语句
for file in `tree -f -i --noreport -P *mp4`; do if test -f $file; then echo -n "文件：$file，时长：" ;echo "scale=2;$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 -i $file)/60" | bc ;fi;done
find /home/blade/Record/ -type f -printf '%p\n' | sort -n  |grep mp4| head -n 1

netty报文格式

ffff01000000000513010000ffff
开始报文：ffff01000000000413010000ffff；ffff01000000000613010000ffff
停止报文：ffff01000000000513020000ffff；