简介

x265是一个免费软件 库和应用程序，用于将视频流编码为H.265/MPEG-H HEVC压缩格式，并根据GNU GPL条款发布。

获取

最新的x265源代码可通过官网直接下载源码包

配置

linux@localhost:~$ mkdir x265onarm
linux@localhost:~$ sudo apt install git yasm nasm cmake cmake-curses-gui pkg-config diffutils libnuma-dev

备份方便后面编译错误可以直接重捣

linux@localhost:~$ git clone https://bitbucket.org/multicoreware/x265_git.git
linux@localhost:~$ cp -r x265_git/build/arm-linux x265_git/build/arm-linux-build

linux@localhost:~$ cd  x265_git/build/arm-linux-build

修改交叉编译器前缀

linux@localhost:~/x265_git/build/arm-linux-build$ sed -i "s/arm-linux-gnueabi/arm-none-linux-gnueabi/g" crosscompile.cmake

修改目标主机架构，可通过查看交叉编译器版本的参数--with-cpu并前往ARM官网查看得知架构

linux@localhost:~/x265_git/build/arm-linux-build$ sed -i "s/armv6l/armv7l/g" crosscompile.cmake

使用ccmake处理由cmake系统生成/使用的文件

linux@localhost:~/x265_git/build/arm-linux-build$ cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE=crosscompile.cmake -DCMAKE_ASM_FLAGS="-fPIC" -DCMAKE_CXX_FLAGS="-fPIC" -DCMAKE_C_FLAGS="-fPIC" -DCMAKE_INSTALL_PREFIX=${HOME}/x265onarm -DCMAKE_SHARED_LINKER_FLAGS="-ldl" ../../source && ccmake ../../source

GUI交互界面配置
- 首先，按t切换高级模式，检查各项参数是否正确；
- 其次，按c进行配置；
- 然后，按g保存配置并退出。

安装

linux@localhost:~/x265_git/build/arm-linux-build$ make
linux@localhost:~/x265_git/build/arm-linux-build$ make install

查看

linux@localhost:~/x265onarm$ ls -la
total 20
drwxrwxrwx 1 linux linux 4096 Mar 19 10:19 .
drwxr-xr-x 1 linux linux 4096 Mar 19 10:19 ..
drwxr-xr-x 1 linux linux 4096 Mar 19 10:19 bin
drwxr-xr-x 1 linux linux 4096 Mar 19 10:19 include
drwxr-xr-x 1 linux linux 4096 Mar 19 10:19 lib
linux@localhost:~/x265onarm$ tree
.
├── bin
│   └── x265
├── include
│   ├── x265_config.h
│   └── x265.h
└── lib
    ├── libx265.a
    ├── libx265.so -> libx265.so.204
    ├── libx265.so.204
    └── pkgconfig
        └── x265.pc

4 directories, 7 files
linux@localhost:~/x265onarm$ cd lib
linux@localhost:~/x265onarm/lib$ file libx265.so.204
libx265.so.204: ELF 32-bit LSB shared object, ARM, EABI5 version 1 (GNU/Linux), dynamically linked, not stripped

确认无误后，即可将对应的库文件和可执行程序上传到开发板的lib目录和bin目录中使用，当然也可以配合其他库文件进行相关的移植。