ffmpeg编译安装过程报错解决

# 无法访问这个项目：https://chromium.googlesource.com/webm/libvpx.git
[root@aniu-ops ffmpeg_sources]# git clone --depth 1 https://chromium.googlesource.com/webm/libvpx.git
Initialized empty Git repository in /root/ffmpeg_sources/libvpx/.git/
error: Failed connect to chromium.googlesource.com:443; Operation now in progress while accessing https://chromium.googlesource.com/webm/libvpx.git/info/refs

fatal: HTTP request failed

更换地址：
git clone --depth 1 https://github.com/webmproject/libvpx.git

# 编译libvpx报错
./configure: line 735: check_add_cxx_flags: command not found

- http://wiki.webmproject.org/ffmpeg/building-with-libvpx

gcc -m64 -Werror -mavx512f -mavx512cd -mavx512bw -mavx512dq -mavx512vl -c -o /tmp/vpx-conf-9470-3770.o /tmp/vpx-conf-9470-3770.c
cc1: error: unrecognized command line option "-mavx512f"
cc1: error: unrecognized command line option "-mavx512cd"
cc1: error: unrecognized command line option "-mavx512bw"
cc1: error: unrecognized command line option "-mavx512dq"
cc1: error: unrecognized command line option "-mavx512dq"
cc1: error: unrecognized command line option "-mavx512vl"


cc1plus: error: command line option "-Wdeclaration-after-statement" is valid for C/ObjC but not for C++

# 上面的报错是git clone的libvpx有问题，笔者使用
wget https://github.com/webmproject/libvpx/archive/v1.7.0.tar.gz 下载特定版本的libvpx，configure就没问题

下面是make完成的warning提示：

/root/ffmpeg_sources/libvpx/mainpage.dox:25: Warning: unable to resolve reference to `samples' for \ref command
/root/ffmpeg_sources/libvpx/mainpage.dox:25: Warning: unable to resolve reference to `samples' for \ref command
/root/ffmpeg_sources/libvpx/usage_dx.dox:12: Warning: unable to resolve reference to `samples' for \ref command
/root/ffmpeg_sources/libvpx/usage_cx.dox:8: Warning: unable to resolve reference to `samples' for \ref command
/root/ffmpeg_sources/libvpx/usage_cx.dox:8: Warning: unable to resolve reference to `samples' for \ref command
/root/ffmpeg_sources/libvpx/usage_dx.dox:12: Warning: unable to resolve reference to `samples' for \ref command
[root@aniu-ops libvpx]# make install
    [INSTALL] /root/ffmpeg_build/lib/libvpx.a
    [INSTALL] /root/ffmpeg_build/lib/pkgconfig/vpx.pc
make[1]: Nothing to be done for `install'.
make[1]: Nothing to be done for `install'.

# ERROR: freetype2 not found using pkg-config

yum install freetype*

# ERROR: x265 not found using pkg-config

# 安装libx265报错
Could NOT find NUMA (missing:  NUMA_ROOT_DIR NUMA_INCLUDE_DIR NUMA_LIBRARY)  

yum install numactl numactl-devel