yum groupinstall "Development tools"
cd /etc/yum.repos.d/
cp -prv ../yum.repos.d{,.orig}                
vim dag.repo
cat dag.repo 
[dag]
name=Dag RPM Repository for Red Hat Enterprise Linux
baseurl=http://apt.sw.be/redhat/el$releasever/en/$basearch/dag
gpgcheck=1
gpgkey=http://dag.wieers.com/packages/RPM-GPG-KEY.dag.txt
enabled=1
protect=0
wget http://dag.wieers.com/packages/RPM-GPG-KEY.dag.txt -P /tmp
rpm --import /tmp/RPM-GPG-KEY.dag.txt
yum repolist
yum install ffmpeg-devel re2c ffmpeg
cd /usr/local/src/
wget http://downloads.sourceforge.net/project/ffmpeg-php/ffmpeg-php/0.6.0/ffmpeg-php-0.6.0.tbz2
tar -xjf ffmpeg-php-0.6.0.tbz2
cd ffmpeg-php-0.6.0/
phpize
./configure
sed -i 's#PIX_FMT_RGBA32#PIX_FMT_RGB32#' ./ffmpeg_frame.c
sed -i '311,360s/list_entry/zend_rsrc_list_entry/' ./ffmpeg_movie.c
make && make install
echo -e "extension=ffmpeg.so\n" > /etc/php.d/ffmpeg.ini
apache -k restart
php -m|grep ffmpeg

参考文章：https://stavrovski.net/blog/install-ffmpeg-and-ffmpeg-php-in-centos-6-with-virtualmin