安装方法一：直接下载ffmpeg静态库（推荐）

ffmpeg_static

下载官方提供的静态库，默认带了很多编码器，很方便。
下面是官方静态库4.1.4版本配置文件：

Configuration:
  --enable-gpl
  --enable-version3
  --enable-sdl2
  --enable-fontconfig
  --enable-gnutls
  --enable-iconv
  --enable-libass
  --enable-libbluray
  --enable-libfreetype
  --enable-libmp3lame
  --enable-libopencore-amrnb
  --enable-libopencore-amrwb
  --enable-libopenjpeg
  --enable-libopus
  --enable-libshine
  --enable-libsnappy
  --enable-libsoxr
  --enable-libtheora
  --enable-libtwolame
  --enable-libvpx
  --enable-libwavpack
  --enable-libwebp
  --enable-libx264
  --enable-libx265
  --enable-libxml2
  --enable-libzimg
  --enable-lzma
  --enable-zlib
  --enable-gmp
  --enable-libvidstab
  --enable-libvorbis
  --enable-libvo-amrwbenc
  --enable-libmysofa
  --enable-libspeex
  --enable-libxvid
  --enable-libaom
  --enable-appkit
  --enable-avfoundation
  --enable-coreimage
  --enable-audiotoolbox

Libraries:
  SDL               2.0.9             <https://libsdl.org>
  Fontconfig        2.13.0            <http://freedesktop.org/wiki/Software/fontconfig>
  GnuTLS            3.6.8             <https://gnutls.org/>
  libiconv          1.15              <http://gnu.org/software/libiconv>
  libass            0.14.0            <https://github.com/libass/libass>
  libbluray         20180913-2d18c70  <https://www.videolan.org/developers/libbluray.html>
  FreeType          2.10.1            <http://freetype.sourceforge.net>
  LAME              3.100             <http://lame.sourceforge.net>
  OpenCORE AMR      20170731-07a5be4  <https://sourceforge.net/projects/opencore-amr>
  OpenJPEG          20190615-8db9d25  <https://github.com/uclouvain/openjpeg>
  Opus              20190604-ad8fe90  <https://opus-codec.org>
  shine             3.1.1             <https://github.com/savonet/shine>
  Snappy            1.1.7             <https://github.com/google/snappy>
  libsoxr           20180224-945b592  <http://sourceforge.net/projects/soxr>
  Theora            20171023-e5d205b  <http://theora.org>
  TwoLAME           0.3.13            <http://twolame.org>
  vpx               20190715-d749bc7  <http://webmproject.org>
  WavPack           5.1.0             <http://wavpack.com>
  WebP              1.0.3             <https://developers.google.com/speed/webp>
  x264              20190314-5493be8  <https://www.videolan.org/developers/x264.html>
  x265              20190708-147fb92  <https://bitbucket.org/multicoreware/x265/wiki/Home>
  libxml2           2.9.8             <http://xmlsoft.org>
  z.lib             20190712-e655cd4  <https://github.com/sekrit-twc/zimg>
  XZ Utils          5.2.4             <http://tukaani.org/xz>
  zlib              1.2.11            <http://zlib.net>
  vid.stab          20190213-aeabc8d  <http://public.hronopik.de/vid.stab>
  Vorbis            20180705-46e70fa  <http://vorbis.com>
  VisualOn AMR-WB   20141107-3b3fcd0  <https://sourceforge.net/projects/opencore-amr>
  libmysofa         20181220-50ee637  <https://github.com/hoene/libmysofa>
  Speex             20181021-6e04bfa  <http://speex.org>
  Xvid              1.3.5             <https://labs.xvid.com>
  aom               20190716-c41e3e1  <https://aomedia.googlesource.com/aom>

安装方法二：手动编译

在官网下载源代码：https://ffmpeg.org/download.html

download

比如：ffmpeg-4.1.4.tar.bz2

• 解压
  $ tar xvf ffmpeg-4.1.4.tar.bz2

• 编译
  终端进入ffmpeg-4.1.4文件夹后执行

$ ./configure
$ make && make install

直接使用 ./configure ，安装完成后，缺少一些额外的编码器，如：libmp3lame等

• 错误处理
  在运行 ./configure 时，出现ffmpeg yasm not found, use --disable-yasm for a crippled build的错误

• 解决方法：手动安装yasm
  在这里下载最新版本的yasm：http://www.tortall.net/projects/yasm/releases
  然后解压，编译安装。

基本操作

• 音量操作
  https://trac.ffmpeg.org/wiki/AudioVolume
• 音视频转换
  https://ffmpeg.org/ffmpeg.html#Video-and-Audio-file-format-conversion