1 下载
git clone https://git.ffmpeg.org/ffmpeg.git --config http.proxy= --config http.sslVerify=false
当然也可去官网下载源码包，速度会快点
2 配置
进入源码目录
./configure --prefix=/usr/local/ffmpeg --enable-debug=3 --enable-shared --disable-static
--prefix=/user/local/ffmpeg指定目录
--enable-debug=3 调试等级
--enable-shared 生成动态库
--disable-static 不允许生成静态库
3 编译
make -j 4
4 安装
sudo make install
5 配置环境变量
vim ~/.bashrc
export PATH="$PATH:/usr/local/ffmpeg/bin"
source ~/.bashrc
6 验证
ffmpeg -version
7 安装 ffplay
安装后查看，ffplay没有安装，原因是libsdl2-dev 未安装，配置时自动检测不到,没有打开ffplay安装选项。
https://blog.csdn.net/longbei9029/article/details/69950552?utm_source=blogxgwz5
sudo apt install libsdl2-dev
安装 libsdl2-dev ，重新走前面6步骤，解决该问题
8 安装中报错问题解决
1）remote: Counting objects: 602685, done.
remote: Compressing objects: 100% (124125/124125), done.
error: RPC failed; curl 56 GnuTLS recv error (-54): Error in the pull function.
fatal: The remote end hung up unexpectedly
fatal: 过早的文件结束符（EOF）
fatal: index-pack 失败
git config --global http.postBuffer 524288000
2） gcc is unable to create an executable file.
If gcc is a cross-compiler, use the --enable-cross-compile option.
Only do this if you know what cross compiling means.
C compiler test failed.)
原因：未安装gcc
sudo apt-get install gcc
3） nasm/yasm not found or too old. Use --disable-x86asm for a crippled build.
https://blog.csdn.net/taosera/article/details/79566905
需要安装yasm的汇编编译器
sudo apt-get install yasm
分析：yasm是汇编编译器，ffmpeg为了提高效率使用了汇编指令，如MMX和SSE等。所以系统中未安装yasm时，就会报上面错误。
如果不需要yasm也可以
./configure --disable-x86asm
4) WARNING: pkg-config not found, library detection may fail.
需要配置pkg-config环境变量，不影响使用。
5 Command 'make' not found, but can be installed with:
sudo apt install make
sudo apt install make-guile
原因：新的机子，没装make
sudo apt install make
6）ffmpeg: error while loading shared libraries: libavdevice.so.58: cannot open shared object file: No such file or directory
修改bashrc,添加