follow steps from:

http://scateu.me/2014/03/06/compile-ffmpeg-on-linux-with-x264-and-x265-support.html

tar file from http://download.videolan.org/contrib/

安装x265

https://bitbucket.org/multicoreware/x265/wiki/Home

sudo apt-get install mercurial cmake cmake-curses-gui build-essential
# Note: if the packaged yasm is older than 1.2, you must download
yasm-1.2 and build it

hg clone https://bitbucket.org/multicoreware/x265
hg checkout 0.8
cd x265/build/linux
./make-Makefiles.bash
# 这里将 LOG_CU_STATISTICS　设置为ON，然后，按下“c”，实现configure，按下“q”退出
make
sudo make install
sudo ldconfig

Linux编译FFmpeg支持x265(HEVC) 【failed on redhat 6.5】

原文：http://nicwon.blog.51cto.com/9926038/1617341