CentOS中离线安装ffmpeg 1.下载安装包 ffmpeg-4.1.tar.xz 2.解压安装包：tar -xvJf ffmpeg-4.1.tar.xz3.编译安装： /programFiles/soft/ffmpeg 为自己指定的安装目录./configure --enable-shared --prefix=/programFiles/soft/ffmpeg提示错误：nasm/yasm not found or too old. Use --disable-x86asm for a crippled build. If you think configure made a mistake, make sure you are using the latest version from Git. If the latest version fails, report the problem to the ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net. Include the log file "ffbuild/config.log" produced by configure as this will help solve the problem.安装gcc编译器centos 执行yum install gccubuntu 执行apt install gcc安装yasm编译器：centos 执行yum install -y yasmubuntu 执行apt install -y yasm离线安装yasm：{card-describe title="安装步骤"}离线包： yasm-1.3.0.tar.gzwget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gztar zxvf yasm-1.3.0.tar.gzcd yasm-1.3.0./configuremake && make install{/card-describe}4.编译（编译时间比较长）和安装：make && make install5.遇到问题 -bash: make: command not found 的解决办法 一般出现这个提示，是因为安装系统的时候使用的是最小化mini安装，系统没有安装make、vim等常用命令，直接yum安装下即可。yum -y install gcc automake autoconf libtool make安装g++:yum install gcc gcc-c++6.修改文件/etc/ld.so.confvim /etc/ld.so.confinclude ld.so.conf.d/*.conf将安装目录的lib包路径 /{make install的目录}/ffmpeg/lib 加入最后/programFiles/soft/ffmpeg/lib/使修改生效：ldconfig7.查看版本/programFiles/soft/ffmpeg/bin/ffmpeg -version8.配置环境变量vim /etc/profile在最后PATH添加环境变量（ /programFiles/soft/ffmpeg/bin 为安装目录）：#set ffmpeg environment PATH=$PATH:/programFiles/soft/ffmpeg/bin export PATH或者这么写：#set ffmpeg env export FFMPEG_HOME=/usr/bin/ffmpeg export PATH=$PATH:${FFMPEG_HOME}/bin使配置生效：source /etc/profile 9.查看环境变量是否配置成功ffmpeg -version参考资料：https://www.cnblogs.com/wpjamer/p/ffmpeg.htmlhttps://www.cnblogs.com/wintercloud/p/11162962.html转码时候遇到问题 Unknown encoder 'libx264'即，缺少libx264解码库，需要安装该库：git clone http://git.videolan.org/git/x264.git && cd x264./configure --enable-static --enable-sharedmake && make installFFMPEG使用NVIDIA的GPU硬件转码（使用N卡加速解码）下载ffmpeg源码sudo apt-get install build-essential yasm cmake libtool libc6 libc6-dev unzip wget libnuma1 libnuma-dev正常编译配置（防止报错，根据提示加上--disable-x86asm）./configure --prefix=/usr/local/ffmpeg --enable-shared --enable-yasm --enable-libx264 --enable-gpl --enable-pthreads --extra-cflags=-I/usr/local/x264/include --extra-ldflags=-L/usr/local/x264/lib --disable-x86asmN卡加速编译配置./configure --enable-nonfree -–enable-cuda-sdk –enable-libnpp --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64编译和安装make && make install同分辨率转码, gpu加速转码，ddr在线模式ffmpeg -y -vsync 0 -hwaccel cuvid -c:v h264_cuvid -i input.mp4 -c:a copy -c:v h264_nvenc -b:v 5M output.mp4变分辨率转码：ffmpeg -y -vsync 0 -hwaccel cuvid –resize 1280x720 -c:v h264_cuvid -i input.mp4 -c:a copy -c:v h264_nvenc -b:v 5M output.mp4corp转码 (-crop (top)x(bottom)x(left)x(right))ffmpeg -y -vsync 0 -hwaccel cuvid –crop 16x16x32x32 -c:v h264_cuvid -i input.mp4 -c:a copy -c:v h264_nvenc -b:v 5M output.mp4scale_cuda filter 转码ffmpeg -y -vsync 0 -hwaccel cuvid -c:v h264_cuvid -i input.mp4 -vf scale_cuda=1280:720 -c:a copy -c:v h264_nvenc -b:v 5M output.mp4scale_npp filter 转码ffmpeg -y -vsync 0 -hwaccel cuvid -c:v h264_cuvid -i input.mp4 -vf scale_npp=1280:720 -c:a copy -c:v h264_nvenc -b:v 5M output.mp41:N 转码ffmpeg -y -vsync 0 -hwaccel cuvid -c:v h264_cuvid -i input.mp4 -vf scale_npp=1920:1080 -c:a copy -c:v h264_nvenc -b:v 5M output1.mp4 -vf scale_npp=1280:720 -c:a copy -c:v h264_nvenc -b:v 8M output2.mp4yuv编码, 1:N 编码ffmpeg -y -vsync 0 -pix_fmt yuv420p -s 1920x1080 -i input.yuv -filter_complex "[0:v]hwupload_cuda,split=4[o1][o2][o3][o4]" -map "[o1]" -c:v h264_nvenc -b:v 8M output1.mp4 -map "[o2]" -c:v h264_nvenc -b:v 10M output2.mp4 -map "[o3]" -c:v h264_nvenc -b:v 12M output3.mp4 -map "[o4]" -c:v h264_nvenc -b:v 14M output4.mp4转码, 1:N 编码ffmpeg -y -hwaccel cuvid –c:v h264_cuvid -i input1.mp4 -hwaccel cuvid –c:v h264_cuvid -i input2.mp4 -map 0:0 -vf scale_npp=640:480 –c:v h264_nvenc -b:v 1M output11.mp4 -map 0:0 -vf scale_npp=320:240 –c:v h264_nvenc -b:v 500k output12.mp4 -map 1:0 -vf scale_npp=1280:720 –c:v h264_nvenc -b:v 3M output21.mp4 -map 1:0 -vf scale_npp=640:480 –c:v h264_nvenc -b:v 2M output22.mp4软解码，gpu resize，gpu编码ffmpeg -y -init_hw_device cuda=foo:bar -filter_hw_device foo -i input1.mp4 -i input2.mp4 -map 0:0 -vf hwupload,scale_npp=640:480 –c:v h264_nvenc -b:v 1M output11.mp4 -map 0:0 -vf hwupload,scale_npp=320:240 –c:v h264_nvenc -b:v 500k output12.mp4 -map 1:0 -vf hwupload,scale_npp=1280:720 –c:v h264_nvenc -b:v 2M output21.mp4 -map 1:0 -vf hwupload,scale_npp=640:480 –c:v h264_nvenc -b:v 1M output22.mp4更多配置通过ffmpeg查看NVIDIA编码器和解码器属性配置更多参考：https://developer.nvidia.com/ffmpegh264_nvenc 编码器配置参考Using_FFmpeg_with_NVIDIA_GPU_Hardware_Acceleration_v01.4.pdf

docker部署springboot https://blog.csdn.net/a656678879/article/details/100105267

win10修改docker镜像的存储位置 将win10更新至最新，目前最新版本是20H2，在安装docker desktop(基于wsl2)后，直接下载镜像默认是安装在C盘的，如果C盘空间不足，可按如下方式转移至其它盘docker启动后会自动运行下面两个镜像，docker-desktop是存放程序的，docker-desktop-data是存放镜像的，这两个wsl子系统都是默认放在系统盘的。PS C:\Users\Administrator> wsl -l -v --all NAME STATE VERSION * docker-desktop Running 2 docker-desktop-data Running 21、停止wslwsl --shutdown2、导出前面docker的两个镜像wsl --export docker-desktop-data D:\docker\docker-desktop-data.tar wsl --export docker-desktop D:\docker\docker-desktop.tar3、取消注册wsl --unregister docker-desktop-data wsl --unregister docker-desktop4、将导出的镜像导入到你要转移的目标位置// 用于存储镜像目录 D:\docker\image wsl --import docker-desktop-data D:\docker\image D:\docker\docker-desktop-data.tar // 运行docker主程序目录 D:\docker\bin wsl --import docker-desktop D:\docker\bin D:\docker\docker-desktop.tar5、确认是否转移成功PS C:\Users\Administrator> wsl -l -v --all NAME STATE VERSION * docker-desktop Stopped 2 docker-desktop-data Stopped 26、重新启动docker desktop

ssh服务未启动，22端口启用 这里使用的容器是centos7环境，基本是个比较纯净的环境，几乎什么都没装根据自己需求，先安装一些基本的（容器，默认是root用户）yum install -y net-tools接着安装openssl，openssh-serveryum install -y openssl openssh-server然后启动ssh/usr/sbin/sshd -D这里会报错[root@68e7598797d7 /]# /usr/sbin/sshd -D Could not load host key: /etc/ssh/ssh_host_rsa_key Could not load host key: /etc/ssh/ssh_host_ecdsa_key Could not load host key: /etc/ssh/ssh_host_ed25519_key需要进行下面的设置[root@68e7598797d7 /]# ssh-keygen -q -t rsa -b 2048 -f /etc/ssh/ssh_host_rsa_key -N '' [root@68e7598797d7 /]# ssh-keygen -q -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key -N '' [root@68e7598797d7 /]# ssh-keygen -t dsa -f /etc/ssh/ssh_host_ed25519_key -N ''接着修改sshd_config文件配置信息，路径为 /etc/ssh/sshd_config1.将 Port 22 前面的注释去掉（开启22号端口）2.将 PermitRootLogin 的 no 改为 yes （这里是设置是否允许root用户登录，可根据自己需求决定是否开启）重新启动ssh[root@68e7598797d7 /]# /usr/sbin/sshd -D &注意，如果设置都没问题的话，命令结尾加个‘&’，自动后台运行，启动成功会返回进程号[root@68e7598797d7 /]# /usr/sbin/sshd -D & [1] 16给root添加密码添加过的可跳过此步骤[root@68e7598797d7 /]# yum install passwd [root@68e7598797d7 /]# passwd

linux修改系统中文字符集支持 [root@localhost ~]# docker run -it -d centos:7 [root@650da1307bb1 /]# echo $LANG [root@650da1307bb1 /]# locale # 查看当前系统所使用的字符集 LANG= LC_CTYPE="POSIX" LC_NUMERIC="POSIX" LC_TIME="POSIX" LC_COLLATE="POSIX" LC_MONETARY="POSIX" LC_MESSAGES="POSIX" LC_PAPER="POSIX" LC_NAME="POSIX" LC_ADDRESS="POSIX" LC_TELEPHONE="POSIX" LC_MEASUREMENT="POSIX" LC_IDENTIFICATION="POSIX" LC_ALL= [root@650da1307bb1 /]# locale -a | grep CN # 默认没有中文 [root@650da1307bb1 /]# locale -a | grep zh [root@650da1307bb1 /]# locale -a C POSIX en_AG en_AG.utf8 en_AU en_AU.iso88591 en_AU.utf8 en_US en_US.iso88591 en_US.iso885915 en_US.utf8 [root@650da1307bb1 /]# yum install -y kde-l10n-Chinese # 需要执行命令进行安装 [root@650da1307bb1 /]# yum reinstall -y glibc-common [root@650da1307bb1 /]# yum groupinstall "fonts" -y [root@650da1307bb1 /]# yum install -y system-config-language [root@650da1307bb1 /]# localedef -c -f UTF-8 -i zh_CN zh_CN.UFT-8 # 定义字符集 [root@650da1307bb1 /]# localedef -c -f GBK -i zh_CN zh_CN.GBK [root@650da1307bb1 /]# localedef -c -f GB2312 -i zh_CN zh_CN.GB2312 [root@650da1307bb1 /]# locale -a C POSIX en_US.utf8 zh_CN.gb2312 zh_CN.gbk zh_CN.uft8 [root@650da1307bb1 /]# cat /etc/locale.conf LANG="en_US.UTF-8" [root@650da1307bb1 /]# echo 'LANG="zh_CN.UTF-8"' > /etc/locale.conf # 修改系统字符集 [root@650da1307bb1 /]# cat /etc/locale.conf LANG="zh_CN.UTF-8" [root@650da1307bb1 /]# source /etc/locale.conf [root@650da1307bb1 /]# echo 'export LC_ALL="zh_CN.utf8"' >> /etc/profile [root@650da1307bb1 /]# source /etc/profile [root@650da1307bb1 /]# locale LANG=zh_CN.UTF-8 LC_CTYPE="zh_CN.uft8" LC_NUMERIC="zh_CN.uft8" LC_TIME="zh_CN.uft8" LC_COLLATE="zh_CN.uft8" LC_MONETARY="zh_CN.uft8" LC_MESSAGES="zh_CN.uft8" LC_PAPER="zh_CN.uft8" LC_NAME="zh_CN.uft8" LC_ADDRESS="zh_CN.uft8" LC_TELEPHONE="zh_CN.uft8" LC_MEASUREMENT="zh_CN.uft8" LC_IDENTIFICATION="zh_CN.uft8" LC_ALL=zh_CN.uft8 #### 如果还出现乱码,执行以下命令 #### [root@650da1307bb1 fonts]# cd /usr/share/fonts/ [root@650da1307bb1 fonts]# fc-cache -fv #### 生成镜像 ########## docker commit -m 'test' e265924baa80 centos:7-utf8 ########### dockerfile ############################################## FROM centos:7 RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \ && yum -y install kde-l10n-Chinese \ && yum -y reinstall glibc-common \ && localedef -c -f UTF-8 -i zh_CN zh_CN.UTF-8 \ && echo 'LANG="zh_CN.UTF-8"' > /etc/locale.conf \ && source /etc/locale.conf \ && yum clean all ENV LANG=zh_CN.UTF-8 \ LC_ALL=zh_CN.UTF-8