一、參考資料

Ubuntu系統下交叉編譯x264-CSDN博客

二、交叉編譯x264

1. 下載源碼

下載x264：https://www.videolan.org/developers/x264.html

git clone https://code.videolan.org/videolan/x264.git
cd x264
mkdir x264build

2. 設置環境變量

設置交叉編譯工具鏈的環境變量：

export PATH=/home/yoyo/360Downloads/toolchains/arm-linux-gnueabihf/bin:$PATH

3. 生成configure配置

./configure \
--prefix="/home/yoyo/360Downloads/x264/x264build" \
--sysroot="/home/yoyo/360Downloads/toolchains/arm-linux-gnueabihf/arm-linux-gnueabihf/libc" \
--host=arm-linux-gnueabihf \
--cross-prefix=arm-linux-gnueabihf- \
--enable-static \
--enable-shared \
--extra-cflags="-I/home/yoyo/360Downloads/nasm-2.16.03/arm32_install/include" \
--extra-ldflags="-L/home/yoyo/360Downloads/nasm-2.16.03/arm32_install/lib" 

參數解釋：

• --prefix：安裝路徑；
• --enable-static：生成靜態庫；
• --enable-shared：生成動態庫；
• --extra-cflags：引入nasm庫的頭文件；
• --extra-ldflags：引入nasm的lib庫。

輸出示例：

yoyo@yoyo:~/360Downloads/x264$ ./configure \
> --prefix="/home/yoyo/360Downloads/x264/x264build" \
> --sysroot="/home/yoyo/360Downloads/toolchains/arm-linux-gnueabihf/arm-linux-gnueabihf/libc" \
> --host=arm-linux-gnueabihf \
> --cross-prefix=arm-linux-gnueabihf- \
> --enable-static \
> --enable-shared \
> --extra-cflags="-I/home/yoyo/360Downloads/nasm-2.16.03/arm32_install/include" \
> --extra-ldflags="-L/home/yoyo/360Downloads/nasm-2.16.03/arm32_install/lib" 
platform:       ARM
byte order:     little-endian
system:         LINUX
cli:            yes
libx264:        internal
shared:         yes
static:         yes
bashcompletion: no
asm:            yes
interlaced:     yes
avs:            yes
lavf:           no
ffms:           no
mp4:            no
gpl:            yes
thread:         posix
opencl:         yes
filters:        crop select_every
lto:            no
debug:          no
gprof:          no
strip:          no
PIC:            yes
bit depth:      all
chroma format:  all

You can run 'make' or 'make fprofiled' now.

4. 編譯安裝

# 編譯
make -j8

# 安裝
make install

make install 安裝：

yoyo@yoyo:~/360Downloads/x264$ make install
install -d /home/yoyo/360Downloads/x264/x264build/bin
install x264 /home/yoyo/360Downloads/x264/x264build/bin
install -d /home/yoyo/360Downloads/x264/x264build/include
install -d /home/yoyo/360Downloads/x264/x264build/lib/pkgconfig
install -m 644 ./x264.h x264_config.h /home/yoyo/360Downloads/x264/x264build/include
install -m 644 x264.pc /home/yoyo/360Downloads/x264/x264build/lib/pkgconfig
install -d /home/yoyo/360Downloads/x264/x264build/lib
ln -f -s libx264.so.164 /home/yoyo/360Downloads/x264/x264build/lib/libx264.so
install -m 755 libx264.so.164 /home/yoyo/360Downloads/x264/x264build/lib
install -d /home/yoyo/360Downloads/x264/x264build/lib
install -m 644 libx264.a /home/yoyo/360Downloads/x264/x264build/lib
arm-linux-gnueabihf-gcc-ranlib /home/yoyo/360Downloads/x264/x264build/lib/libx264.a

如果執行 make install 僅拷貝了 bin 目錄，則需要手動將lib庫和include頭文件拷貝到安裝目錄。

cp x264.h x264_config.h ../x264build/include/
cp libx264.a ../x264build/lib/
cp x264.pc ../x264build/lib/pkgconfig/

5. 移植到開發板

將編譯好的文件，拷貝到開發板。

# 拷貝 include
cp -r ./arm32_install/include/* /PATH/TO/arm-linux-gnueabihf/arm-linux-gnueabihf/libc/usr/include

# 拷貝lib
cp -r ./arm32_install/lib/* /PATH/TO/arm-linux-gnueabihf/arm-linux-gnueabihf/libc/usr/lib

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