What is the difference between dnf and yum in centos8

yum and DNF are essentially programs that manage dependencies and software repositories, and then utilize RPM to actually install, download, and remove packages. DNF is the successor to yum, and its main difference from yum is that it uses some libraries from openSUSE's ZYpp package manager in an attempt to increase speed and improve other aspects

How to Install FFmpeg on CentOS 8 / RHEL 8

How to install FFmpeg on CentOS 8 / RHEL 8 Linux system? FFmpeg is a free and open source multimedia framework used for playing, encoding, decoding, streaming, transcoding, multiplexing, demultiplexing and filtering multimedia files of various formats including MPEG1 audio and video, MPEG4, h263, ac3, asf, avi, real, mjpeg and Flash.