源码编译安装：

1.下载yasm安装包http://yasm.tortall.net/Download.html   

Source.tar.gz

2.安装yasm

tar -zxzf yasm-1.3.0.tar.gz
cd yasm-1.3.0/
./configure
make
make install

3.下载ffmpe源码包

git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg

4.安装ffmpeg

 先安装依赖库

sudo apt-get install -y autoconf automake build-essential git libass-dev libfreetype6-dev libsdl2-dev libtheora-dev libtool libva-dev libvdpau-dev libvorbis-dev libxcb1-dev libxcb-shm0-dev libxcb-xfixes0-dev pkg-config texinfo wget zlib1g-dev

sudo apt install libavformat-dev

sudo apt install libavcodec-dev

sudo apt install libswresample-dev

sudo apt install libswscale-dev

sudo apt install libavutil-dev

sudo apt install libsdl1.2-dev

再安装ffmpeg

cd ffmpeg

./configure   --enable-shared  --prefix=/usr/local/ffmpeg

make 

sudo make install

成功后查看版本：ffmpeg -version

 

命令安装：

sudo apt-get install yasm

sudo apt-get install ffmpeg