发现一个新的YUM源，里面有ffmpeg，看了下版本还挺新的，就是速度有点慢。

Name        : ffmpeg
Arch        : x86_64
Version     : 2.6.8
Release     : 3.el6.nux
Size        : 2.2 M
Repo        : nux-dextop
Summary     : Digital VCR and streaming server
URL         : http://ffmpeg.org/
License     : GPLv2+
Description : FFmpeg is a complete and free Internet live audio and video
            : broadcasting solution for Linux/Unix. It also includes a digital
            : VCR. It can encode in real time in many formats including MPEG1 audio
            : and video,MPEG4,h263,ac3,asf,avi,real,mjpeg,and flash.

Installation (copy/paste) for EL6:

yum -y install epel-release && rpm -Uvh http://li.nux.ro/download/nux/dextop/el6/x86_64/nux-dextop-release-0-2.el6.nux.noarch.rpm

Installation (copy/paste) for EL7:

yum -y install epel-release && rpm -Uvh http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-5.el7.nux.noarch.rpm

Nux Misc Summary: RPMs that didn’t make it in other repos yet. Notes:
These RPMs might not get updated very frequently. Installation for
EL6: Just drop http://li.nux.ro/download/nux/misc/nux-misc.repo in
your /etc/yum.repos.d directory. The repo is disabled by default,so
you will need to use the –enablerepo=nux-misc yum switch.

My GPG key: http://li.nux.ro/download/nux/RPM-GPG-KEY-nux.ro

YUM地址：http://li.nux.ro/repos.html