cd <你的软件下载目录>
sudo apt-get update
sudo apt-get install libx264-dev
wget http://ffmpeg.org/releases/ffmpeg-4.1.tar.bz2
sudo tar jxvf ffmpeg-4.1.tar.bz2
cd ffmpeg-4.1/
sudo ./configure --prefix=/opt/ffmpeg --enable-shared --enable-pthreads --enable-gpl --enable-avresample --enable-libx264 --disable-yasm
sudo make
sudo install