一、前期准备

1.1、升级boost库，我升级的版本1.65.0，解决后面编译找不到宏定义错误，boost库需要手动编译，网上一大坨。

1.2、安装按各种依赖库，通过yum安装即可，libevent、libevent-devel、gettext-devel、libsigc++20、libsigc++20-devel、glibmm24-devel、glibmm24、libvpx-devel、libvpx、libvpx-utils。如果已经安装则忽略

1.3、gstreamer，kurento依赖gstreamer，所以需要手动编译这个库，具体参考如下篇章

二、gstreamer编译

2.1、编译gobject-introspection

gstreamer依赖了gobject-introspection，centos默认安装不支持PyUnicodeUCS4_DecodeUTF8，需要手动编译
 

=================================错误信息=======================================

make[4]: Entering directory `/root/kurento/deps/gstreamer/gst'
  GEN      Gst-1.0.gir
Traceback (most recent call last):
  File "/usr/bin/g-ir-scanner", line 53, in <module>
    from giscanner.scannermain import scanner_main
  File "/usr/lib64/gobject-introspection/giscanner/scannermain.py", line 35, in <module>
    from giscanner.dumper import compile_introspection_binary
  File "/usr/lib64/gobject-introspection/giscanner/dumper.py", line 28, in <module>
    from .gdumpparser import IntrospectionBinary
  File "/usr/lib64/gobject-introspection/giscanner/gdumpparser.py", line 31, in <module>
    from .transformer import TransformerException
  File "/usr/lib64/gobject-introspection/giscanner/transformer.py", line 28, in <module>
    from .girparser import GIRParser
  File "/usr/lib64/gobject-introspection/giscanner/girparser.py", line 26, in <module>
    from .girwriter import COMPATIBLE_GIR_VERSION
  File "/usr/lib64/gobject-introspection/giscanner/girwriter.py", line 25, in <module>
    from .xmlwriter import XMLWriter
  File "/usr/lib64/gobject-introspection/giscanner/xmlwriter.py", line 36, in <module>
    from giscanner._giscanner import collect_attributes
ImportError: /usr/lib64/gobject-introspection/giscanner/_giscanner.so: undefined symbol: PyUnicodeUCS4_DecodeUTF8
make[4]: *** [Gst-1.0.gir] Error 1
make[4]: Leaving directory `/root/kurento/deps/gstreamer/gst'

====================================解决方案====================================
git clone https://gitlab.gnome.org/GNOME/gobject-introspection.git
git checkout 1.56.1 -b  1.56.1
./configure --with-python=/usr/local/python2.7.15/bin --prefix=/usr/local/gobject-introspection
make && make install

2、gstreamer组件

比较多，但是还是比较好编译的，将下面的组件都编译一下就可以，必须先编译gstreamer。

2.1、声明环境变量

需要指定gobject-introspection路径，因此需要声明

export PKG_CONFIG_PATH=/usr/local/gobject-introspection/lib/pkgconfig/:$PKG_CONFIG_PATH

2.2、编译gstreamer

我这里使用的版本1.14.0，因为kurento最低要求是1.14.0

gstreamer、gst-plugins-base、gst-plugins-bad、 gst-plugins-good 、gst-plugins-ugly、gst-rtsp-server、gst-editing-services、gst-libav
 我是按照这个顺序编译的，当然可以只编译出gstreamer，后面缺少什么依赖在回过头编译也是可以的，注意必须要声明export。

三、编译

我编译的kurento是当前最新稳定版本，6.16.0，编译顺序，kurento-module-creator -> kms-cmake-utils -> kms-jsonrpc -> kms-core -> kurento-media-server

3.1、编译kurento-module-creator

这个是一个java工程，用到了maven，编译结束后执行cp命令，拷贝到相应目录中，注意，我这里的cmake是2.8版本，根据各自环境进行变更

[root@63d5c0084f5b kurento-module-creator]# ls
debian  LICENSE  NOTICE  pom.xml  README.md  scripts  src
[root@63d5c0084f5b kurento-module-creator]# mvn clean install
-bash: mvn: command not found
[root@63d5c0084f5b kurento-module-creator]# . ~/.bash_profile 
[root@63d5c0084f5b kurento-module-creator]# mvn clean install 
[INFO] Scanning for projects...
Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/wagon/wagon-file/1.0/wagon-file-1.0.pom
Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/wagon/wagon-file/1.0/wagon-file-1.0.pom (1.4 kB at 891 B/s)
Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/wagon/wagon-providers/1.0/wagon-providers-1.0.pom
Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/wagon/wagon-providers/1.0/wagon-providers-1.0.pom (2.1 kB at 5.0 kB/s)
Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/wagon/wagon/1.0/wagon-1.0.pom
Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/wagon/wagon/1.0/wagon-1.0.pom (9.8 kB at 23 kB/s)
........
........
........
==========================================编译结束后===================================
cp ./target/kurento-module-creator-jar-with-dependencies.jar /usr/bin
cp ./scripts/kurento-module-creator /usr/bin
cp ./target/classes/FindKurentoModuleCreator.cmake /usr/local/share/cmake-2.8/Modules/

3.2、kms-cmake-utils编译

编译没有遇到错误，如下是执行的命令

git clone https://github.com/Kurento/kms-cmake-utils.git
git checkout 6.16.0 -b 6.16.0
mkdir build
cd build/
cmake ..
make
make install

3.3、kms-jsonrpc

3.3.1、jsoncpp

kms-jsonrpc依赖了jsoncpp，这里jsoncpp是Kurento仓库内的

git clone https://github.com/Kurento/jsoncpp.git
git checkout 1.6.4 -b 1.6.4

修改CMakeLists.txt，增加-fPIC
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -fPIC -Wall -Wextra -pedantic")

编译并安装
export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig/:/usr/local/gobject-introspection/lib/pkgconfig/:$PKG_CONFIG_PATH
cmake -DCMAKE_MODULE_PATH=/usr/local/share/cmake-2.8/Modules/ ..
make && make install

3.4、kms-core

kms-core是核心模块，编译出这个就成功了一大半了

3.4.1、更新组件

yum install http://repo.okay.com.mx/centos/7/x86_64/release/okay-release-1-1.noarch.rpm
yum update --nogpgcheck automake

由于centos默认的gcc版本比较低，不支持c++14，不想自己升级gcc了，所以直接修改cmake文件，将gnu++14修改成gnu++11 

修改cmake文件， 将gnu++14 -->  gnu++11

/usr/local/share/cmake-2.8/Modules/CommonBuildFlags.cmake
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11 -Wall -pthread ${DPKG_CXXFLAGS}")

由于kurento里面gstreamer版本是1.5，但是在centos编译出来的gstreamer，无论是什么版本都是以1.0结尾，所以我们需要将CMakeList.txt中   gstreamer-1.5 ---> 全部修改成  gstreamer-1.0。后面编译过程中如果出现了1.5就改成1.0，肯定没有用问题。

编译kms-core解决gstreamer-1.5 not found

/root/kurento/kms-core/CMakeLists.txt 

3.4.2、进行编译

当编译的时候，缺少什么第三方依赖，就安装就好，这里主要是gstreamer的依赖。将gstreamer-1.5  修改成 gstream-1.0

git clone https://github.com/Kurento/kms-core.git
git checkout 6.16.0 -b 6.16.0

mkdir build && cd build
cmake -DCMAKE_MODULE_PATH=/usr/local/share/cmake-2.8/Modules/ -DCMAKE_VERBOSE_MAKEFILE=ON \
-DVPX_INCLUDE_DIRS=/root/kurento/kms-core/src/gst-plugins/vp8parse \
-DVPX_LIBRARIES=/root/kurento/kms-core/src/gst-plugins/vp8parse ..
make && make install

如果编译错误，应该就是缺少第三方库，缺什么就编译什么，肯定没有问题的。

3.5、kurento-media-server编译

3.5.1、编译websocket

kurento-media-server依赖了websocket，所以需要编译一下，我这里边使用最新稳定版本0.8.2

git clone https://github.com/zaphoyd/websocketpp.git
git checkout 0.8.2
进行编译安装
mkdir build && cd build
 cmake -DCMAKE_INSTALL_PREFIX=/usr ..
make && make install

如果websocket使用的0.7.0，则不需要修改CMakeLists.txt 

修改kurento-media-server 文件
vi ../server/transport/websocket/CMakeLists.txt
将版本0.7.0 修改成0.8.2

 3.5.2、编译kurento-media-server

export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig/:/usr/local/gobject-introspection/lib/pkgconfig/:$PKG_CONFIG_PATH

git clone https://github.com/worker24h/kurento-media-server.git
git checkout 6.16.0 -b 6.16.0
mkdir builid && cd build
cmake -DCMAKE_MODULE_PATH=/usr/local/share/cmake-2.8/Modules/ \
-DCMAKE_C_FLAGS="-I /usr/include/gstreamer-1.0/ -I /usr/include/glib-2.0/ \
-I /usr/lib64/glib-2.0/include/" -DCMAKE_CXX_FLAGS="-I /usr/include/gstreamer-1.0/ \
-I /usr/include/glib-2.0/ -I /usr/lib64/glib-2.0/include/"  ..
make && make install

在编译到最后，出现一个连接错误，这个是缺少符号表，应该是缺少某个库，经过排查发现没有连接gstpbutils，如果应该按照前面gstreamer所有组件都安装了，那么系统中肯定会有，最简单的方式，就是手动编译，把库添加进去即可。

[ 60%] Building CXX object server/CMakeFiles/kurento-media-server.dir/ResourceManager.cpp.o
[ 66%] Building CXX object server/CMakeFiles/kurento-media-server.dir/RequestCache.cpp.o
[ 73%] Building CXX object server/CMakeFiles/kurento-media-server.dir/CacheEntry.cpp.o
[ 80%] Building CXX object server/CMakeFiles/kurento-media-server.dir/logging.cpp.o
[ 86%] Building CXX object server/CMakeFiles/kurento-media-server.dir/modules.cpp.o
[ 93%] Building CXX object server/CMakeFiles/kurento-media-server.dir/loadConfig.cpp.o
[100%] Building CXX object server/CMakeFiles/kurento-media-server.dir/death_handler.cpp.o
Linking CXX executable kurento-media-server
/usr/local/lib64/libkmscoreimpl.so: undefined reference to `gst_video_event_is_force_key_unit'
/usr/local/lib64/libkmsgstcommons.so: undefined reference to `gst_encoding_video_profile_new'
/usr/local/lib64/libkmscoreimpl.so: undefined reference to `gst_video_event_new_upstream_force_key_unit'
/usr/local/lib64/libkmsgstcommons.so: undefined reference to `gst_encoding_container_profile_add_profile'
/usr/local/lib64/libkmsgstcommons.so: undefined reference to `gst_encoding_audio_profile_new'
/usr/local/lib64/libkmsgstcommons.so: undefined reference to `gst_encoding_container_profile_new'
collect2: error: ld returned 1 exit status
make[2]: *** [server/kurento-media-server] Error 1
make[1]: *** [server/CMakeFiles/kurento-media-server.dir/all] Error 2
make: *** [all] Error 2
[root@63d5c0084f5b build]# 
==================解决方案=====================
这个错误显然是没有找到符号表，通过分析编译的时候没有找到gstpbutils库，因为这是最后一步，所以我们可以手动编译，添加上依赖库-lgstpbutils-1.0

命令如下：

cd /root/kurento/kurento-media-server/build/server

/usr/bin/c++   -I /usr/include/gstreamer-1.0/ -I /usr/include/glib-2.0/ -I /usr/lib64/glib-2.0/include/ \
-std=gnu++11 -Wall -pthread  -Wno-old-style-cast -Wno-error=deprecated -DGST_DISABLE_DEPRECATED -DHAVE_CONFIG_H   \
-pie CMakeFiles/kurento-media-server.dir/main.cpp.o \
CMakeFiles/kurento-media-server.dir/version.cpp.o CMakeFiles/kurento-media-server.dir/ServerMethods.cpp.o \
CMakeFiles/kurento-media-server.dir/ResourceManager.cpp.o CMakeFiles/kurento-media-server.dir/RequestCache.cpp.o \
CMakeFiles/kurento-media-server.dir/CacheEntry.cpp.o CMakeFiles/kurento-media-server.dir/logging.cpp.o \
CMakeFiles/kurento-media-server.dir/modules.cpp.o CMakeFiles/kurento-media-server.dir/loadConfig.cpp.o \
CMakeFiles/kurento-media-server.dir/death_handler.cpp.o  -o kurento-media-server \
-rdynamic -lboost_filesystem -lboost_regex -lboost_system -lboost_thread \
-lboost_program_options -lboost_unit_test_framework -lboost_log transport/libtransport.a \
-ldl transport/websocket/libwebsocketTransport.a -lssl -lcrypto -lgstreamer-1.0 -lgobject-2.0 \
-lglib-2.0 /usr/local/lib64/libkmscoreimpl.so /usr/local/lib64/libkmsgstcommons.so \
-lgstsdp-1.0 /usr/local/lib64/libjsonrpc.so -lkmsjsoncpp -lsigc-2.0 -lgstpbutils-1.0 \
-lglibmm-2.4 -lgstreamer-1.0 -lgobject-2.0 -lglib-2.0 /usr/local/lib64/libkmscoreimpl.so \
/usr/local/lib64/libkmsgstcommons.so -lgstsdp-1.0 /usr/local/lib64/libjsonrpc.so -lkmsjsoncpp \
-lsigc-2.0 -lglibmm-2.4 -lboost_filesystem -lboost_regex -lboost_system -lboost_thread \
-Wl,-rpath,/usr/local/lib64

四、总结

kurento的编译，虽然要编译的组件比较多，但是整体来说不是很难，有一些坑已经填好，避免大家再走弯路。