Ubuntu20.04编译ffmpeg

1.安装编译所需工具，GCC
2.安装yasm nasm

• yasm和nasm是两个编译器，编译ffmpeg需要用到
• 安装命令: sudo aptitude install yasm nasm
  3.安装ffmpeg依赖库
  sudo apt-get install libgmp3-dev
  sudo apt install pkg-config
  sudo apt install gnutls-bin
  sudo aptitude install libaom-dev
  sudo aptitude install libass-dev
  sudo aptitude install libbluray-dev
  sudo aptitude install libfdk-aac-dev
  sudo aptitude install libmp3lame-dev
  sudo aptitude install libopencore-amrnb-dev
  sudo aptitude install libopencore-amrwb-dev
  sudo aptitude install libopenmpt-dev
  sudo aptitude install libopus-dev
  sudo aptitude install libshine-dev
  sudo aptitude install libsnappy-dev
  sudo aptitude install libsoxr-dev
  sudo aptitude install libspeex-dev
  sudo aptitude install libtheora-dev
  sudo aptitude install libtwolame-dev
  sudo aptitude install libvo-amrwbenc-dev
  sudo aptitude install llibvpx-dev
  sudo aptitude install libwavpack-dev
  sudo aptitude install libwebp-dev
  sudo aptitude install libx264-dev
  sudo aptitude install libx265-dev
  sudo aptitude install libxvidcore-dev
  sudo aptitude install liblzma-dev
  4.下载ffmpeg；FFmpeg 源码下载地址：
  5.解压到指定文件夹，如下图所示
  

6.命令行进入到解压后的配置安装ffmpeg：./configure --prefix=/home/deng/ffmpeg_workspace --enable-static --enable-shared
7.执行make
8.执行make install
9.编译完成后如下图：

10.如果有需要可以配置ffmpeg的环境变量