ffmpeg 预设的值 加速

centos 安装ffmpeg

编译安装

官网获取最新的linux ffmpeg 代码
https://ffmpeg.org//releases/

mkdir -p /data/app/ffmpeg
cd /data/app/ffmpeg
wget http://www.ffmpeg.org/releases/ffmpeg-7.1.tar.gz 
tar -zxvf ffmpeg-7.1.tar.gz#安装所需的编译环境
yum install -y \nasm yasm pkgconfig libtool \gcc gcc-c++ make automake \cmake zlib-devel \bzip2 bzip2-devel \xz xz-devel \libffi-devel \freetype-devel \fontconfig-devel \SDL2-develcd ffmpeg-7.1
./configure --prefix=/data/app/ffmpeg
make && make install

sudo yum install epel-release -y
sudo yum install https://download1.rpmfusion.org/free/el/rpmfusion-free-release-$(rpm -E %rhel).noarch.rpm -ysudo yum install ffmpeg ffmpeg-devel -yffmpeg -version

ultrafast: Fastest encoding, but lowest compression (largest file size).
superfast
veryfast
faster
fast
medium (default)
slow
slower
veryslow: Slowest encoding, but the best compression (smallest file size and highest quality).