# 支持系统：
    arm
    
# 发布日志
    1. 支持GB28181 UDP

# 注意
    由于子库和opencv原因，三方库都要添加 _GLIBCXX_USE_CXX11_ABI=0 编译

# 三方库编译
### ffmpeg编译
~~~
./configure --enable-debug --extra-cflags=-g --extra-ldflags=-g --disable-optimizations --disable-stripping --disable-x86asm --enable-nonfree --disable-vaapi --extra-cflags=-fPIC --enable-shared --enable-pic --enable-ffplay --prefix=./debug
~~~
其中以下是用于调试的，编译release可以去掉：
~~~
--enable-debug --extra-cflags=-g --extra-ldflags=-g --disable-optimizations --disable-stripping
~~~
编译release版本
~~~
./configure --disable-x86asm --enable-nonfree --disable-vaapi --extra-cflags=-fPIC --enable-shared --enable-pic --enable-ffplay --prefix=./release
~~~
然后 make , make install
##### 支持H264版本编译
~~~
export PKG_CONFIG_PATH=/home/cmhu/vpt_ascend_arm/3rdparty/ffmpeg-4.4.4/x264/release/lib/pkgconfig:$PKG_CONFIG_PATH
~~~
主要h264的pkgconfig文件xh264.pc中的prefix路径，改为绝对路径比较容易编译，如改成
~~~
prefix=/home/cmhu/vpt_ascend_arm/3rdparty/ffmpeg-4.4.4/x264/release
~~~
~~~
./configure --prefix=./debug --enable-debug --extra-cflags=-g --extra-ldflags=-g --disable-optimizations --disable-stripping --disable-x86asm --enable-nonfree --disable-vaapi --extra-cflags=-fPIC --enable-shared --enable-pic --enable-ffplay --enable-demuxers --enable-parsers --enable-ffprobe --enable-libx264 --enable-gpl --enable-pthreads --extra-cflags="-I/home/cmhu/vpt_ascend_arm/3rdparty/ffmpeg-4.4.4/x264/release/lib/include" --extra-ldflags="-L/home/cmhu/vpt_ascend_arm/3rdparty/ffmpeg-4.4.4/x264/release/lib"
~~~
其中
~~~
--enable-demuxers --enable-parsers --enable-ffprobe
~~~
是用来支持内存数据的probe的。
对应的release版本编译命令
~~~
./configure --prefix=./release --disable-x86asm --enable-nonfree --disable-vaapi --extra-cflags=-fPIC --enable-shared --enable-pic --enable-ffplay --enable-demuxers --enable-parsers --enable-ffprobe --enable-libx264 --enable-gpl --enable-pthreads --extra-cflags="-I/home/cmhu/vpt_ascend_arm/3rdparty/ffmpeg-4.4.4/x264/release/lib/include" --extra-ldflags="-L/home/cmhu/vpt_ascend_arm/3rdparty/ffmpeg-4.4.4/x264/release/lib"
~~~

### jsoncpp/opencv/spdlog 编译
~~~
mkdir build 
cd ./build
cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=../release ..
make -j100
make install
~~~