注意：这里由于本人对mac 脚本命令不熟（先简单看了半天linux shell命令行，推荐大家看这本书， Linux 运维之道，半天就上手了），本篇只是自己操作的，仅仅是个走下流程的Demo说明。接着上篇笔记，来实现android 多平台编译（armeabi arm64-v8a armv7a x86 x86-64） 。

第一个脚本主要是用来具体编译某一个平台的， 先上脚本，我在说明！！

set -e
echo --------
echo ANDROID_NDK path is ok !
ANDROID_NDK=/Users/cievon/Documents/AndroidSDK/android-ndk-r10e
echo --------
echo ROOT_PREFIX Include and lib output paths ! You can set up your own path here
ROOT_PREFIX=$(pwd)/../build/x264
ROOT=$(pwd)
echo --------
echo 1.Check the NDK path
mkdir $ROOT_PREFIX
if [ -z "$ANDROID_NDK" ]; then
    echo "You must define ANDROID_NDK before starting."
    echo "They must point to your NDK directories.\n"
    exit 1
fi
#--------------------
echo --------
echo 2.Check and compile platform for android
FF_ARCH=$1
if [ -z "$FF_ARCH" ]; then
    echo "You must specific an architecture 'arm, armv7a, x86, ...'.\n"
    exit 1
fi
echo --------
echo 3.configure params for different platforms
FF_ANDROID_PLATFORM=android-9
#----- armv7a begin -----
if [ "$FF_ARCH" = "armv7a" ]; then
    PREBUILT=$ANDROID_NDK/toolchains/arm-linux-androideabi-4.9/prebuilt
    export PATH=$PATH:$PREBUILT/darwin-x86_64/bin/
    PLATFORM=$ANDROID_NDK/platforms/$FF_ANDROID_PLATFORM/arch-arm
    CROSS_PREFIX=$PREBUILT/darwin-x86_64/bin/arm-linux-androideabi-
    HOST=arm-linux
    PREFIX=$ROOT_PREFIX/$FF_ARCH/
    FF_CFG_CONF="$FF_CFG_CONF --disable-asm"
elif [ "$FF_ARCH" = "armv5" ]; then
    PREBUILT=$ANDROID_NDK/toolchains/arm-linux-androideabi-4.9/prebuilt
    export PATH=$PATH:$PREBUILT/darwin-x86_64/bin/
    PLATFORM=$ANDROID_NDK/platforms/$FF_ANDROID_PLATFORM/arch-arm
    CROSS_PREFIX=$PREBUILT/darwin-x86_64/bin/arm-linux-androideabi-
    HOST=arm-linux
    PREFIX=$ROOT_PREFIX/$FF_ARCH/
    FF_CFG_CONF="$FF_CFG_CONF --disable-asm"
elif [ "$FF_ARCH" = "arm64" ]; then
    FF_ANDROID_PLATFORM=android-21
    PREBUILT=$ANDROID_NDK/toolchains/aarch64-linux-android-4.9/prebuilt
    export PATH=$PATH:$PREBUILT/darwin-x86_64/bin/
    PLATFORM=$ANDROID_NDK/platforms/$FF_ANDROID_PLATFORM/arch-arm64
    CROSS_PREFIX=$PREBUILT/darwin-x86_64/bin/aarch64-linux-android-
    HOST=aarch64-linux
    PREFIX=$ROOT_PREFIX/$FF_ARCH/
    FF_CFG_CONF="$FF_CFG_CONF --enable-asm"
elif [ "$FF_ARCH" = "x86" ]; then
    PREBUILT=$ANDROID_NDK/toolchains/x86-4.9/prebuilt
    export PATH=$PATH:$PREBUILT/darwin-x86_64/bin/
    PLATFORM=$ANDROID_NDK/platforms/$FF_ANDROID_PLATFORM/arch-x86
    CROSS_PREFIX=$PREBUILT/darwin-x86_64/bin/i686-linux-android-
    HOST=i686-linux
    PREFIX=$ROOT_PREFIX/$FF_ARCH/
    FF_CFG_CONF="$FF_CFG_CONF --disable-asm"
elif [ "$FF_ARCH" = "x86_64" ]; then
    FF_ANDROID_PLATFORM=android-21
    PREBUILT=$ANDROID_NDK/toolchains/x86_64-4.9/prebuilt
    export PATH=$PATH:$PREBUILT/darwin-x86_64/bin/
    PLATFORM=$ANDROID_NDK/platforms/$FF_ANDROID_PLATFORM/arch-x86_64
    CROSS_PREFIX=$PREBUILT/darwin-x86_64/bin/x86_64-linux-android-
    HOST=x86_64-linux
    PREFIX=$ROOT_PREFIX/$FF_ARCH/
    FF_CFG_CONF="$FF_CFG_CONF --disable-asm"
else
echo --------
    echo "unknown architecture $FF_ARCH";
    exit 1
fi
echo --------
mkdir $PREFIX
echo Enter your x264 source directory ! You have to modify it into your own source path
cd $ROOT/../x264-$FF_ARCH
echo --------
echo Build the necessary and other attributes for configure
FF_CFG_CONF="$FF_CFG_CONF --prefix=$PREFIX"
# FF_CFG_CONF="$FF_CFG_CONF --enable-shared" 
FF_CFG_CONF="$FF_CFG_CONF --enable-static"
FF_CFG_CONF="$FF_CFG_CONF --disable-cli"
# FF_CFG_CONF="$FF_CFG_CONF --disable-opencl"
FF_CFG_CONF="$FF_CFG_CONF --disable-thread"
# FF_CFG_CONF="$FF_CFG_CONF --enable-pic"
# FF_CFG_CONF="$FF_CFG_CONF --enable-strip"
# FF_CFG_CONF="$FF_CFG_CONF --disable-avs"
# FF_CFG_CONF="$FF_CFG_CONF --disable-swscale"
# FF_CFG_CONF="$FF_CFG_CONF --disable-lavf"
# FF_CFG_CONF="$FF_CFG_CONF --disable-ffms"
FF_CFG_CONF="$FF_CFG_CONF --disable-gpac"
FF_CFG_CONF="$FF_CFG_CONF --disable-lsmash"
FF_CFG_CONF="$FF_CFG_CONF --host=$HOST"
FF_CFG_CONF="$FF_CFG_CONF --cross-prefix=$CROSS_PREFIX"
FF_CFG_CONF="$FF_CFG_CONF --sysroot=$PLATFORM"
echo --------
echo configure: $FF_CFG_CONF
echo
./configure $FF_CFG_CONF
echo --------
echo make
make
sudo make install
echo --------
echo finish ! ! !
echo --------

NDK编译工具要配置3个路径 ：android ndk 目录；ndk 下面的 platforms 和 toolchains ，剩下的就是android 支持的平台参数配置不同了，看下这两个目录 对比下一目了然,D:\android-sdk\ndk-bundle\platforms\android-21 和 D:\android-sdk\ndk-bundle\toolchains。
x264源码编译的配置，流程如下，配置configure 参数，执行 ./configure ....参数内容 ，然后 make ，再 make install ，就得到你要的 include 和lib 目录了！！！脚本里面的配置 有三个必要的配置，这里呢！！！我这里贴图 ，到源码目录下，有个configure文件，这就是总开关了，打开里面，如下图：

image

是不是懵逼了！！！ 我建议先按照我的配置来，先编出来！！ 有时间，可以仔细看这个脚本配置。
首先NDK 交叉编译 这单个是必须的：

FF_CFG_CONF="$FF_CFG_CONF --host=$HOST"
FF_CFG_CONF="$FF_CFG_CONF --cross-prefix=$CROSS_PREFIX"
FF_CFG_CONF="$FF_CFG_CONF --sysroot=$PLATFORM"！

然后是你要的格式要动态库还是静态库 ：

# FF_CFG_CONF="$FF_CFG_CONF --enable-shared" // 编译成动态库 .so
FF_CFG_CONF="$FF_CFG_CONF --enable-static"//编译成静态库.a ！！！

注意的是：你可以在源码目录下面，打开shell 执行 ./configure --help 上面有队每个配置的说明，也不多好像就20多个！！

下面还有个脚本，主要为了方便 ，先看脚本

UNI_BUILD_ROOT=`pwd`
FF_TARGET=$1
set -e
set +x
FF_ACT_ARCHS_32="armv5 armv7a x86"
FF_ACT_ARCHS_64="armv5 armv7a arm64 x86 x86_64"
FF_ACT_ARCHS_ALL=$FF_ACT_ARCHS_64
echo_archs() {
    echo "===================="
    echo "[*] check archs"
    echo "===================="
    echo "FF_ALL_ARCHS = $FF_ACT_ARCHS_ALL"
    echo "FF_ACT_ARCHS = $*"
    echo ""
}
echo_usage() {
    echo "Usage:"
    echo "  compile-x264.sh armv5|armv7a|arm64|x86|x86_64"
    echo "  compile-x264.sh all|all32"
    echo "  compile-x264.sh all64"
    echo "  compile-x264.sh clean"
    echo "  compile-x264.sh check"
    exit 1
}
echo_nextstep_help() {
    #----------
    echo ""
    echo "--------------------"
    echo "[*] Finished"
    echo "--------------------"
    echo "# to continue to build ffmpeg, run script below,"
    echo "sh compile-ffmpeg.sh "
    echo "# to continue to build ijkplayer, run script below,"
    echo "sh compile-ijk.sh "
}
#----------
case "$FF_TARGET" in
    "")
        echo_archs armv7a
        sh tools/do-compile-x264.sh armv7a
    ;;
    armv5|armv7a|arm64|x86|x86_64)
        echo_archs $FF_TARGET
        sh tools/do-compile-x264.sh $FF_TARGET
        echo_nextstep_help
    ;;
    all32)
        echo_archs $FF_ACT_ARCHS_32
        for ARCH in $FF_ACT_ARCHS_32
        do
            sh tools/do-compile-x264.sh $ARCH
        done
        echo_nextstep_help
    ;;
    all|all64)
        echo_archs $FF_ACT_ARCHS_64
        for ARCH in $FF_ACT_ARCHS_64
        do
            sh tools/do-compile-x264.sh $ARCH
        done
        echo_nextstep_help
    ;;
    clean)
        echo_archs FF_ACT_ARCHS_64
        for ARCH in $FF_ACT_ARCHS_ALL
        do
            if [ -d x264-$ARCH ]; then
                cd x264-$ARCH && cd -
            fi
        done
        rm -rf ./build/x264-*
    ;;
    check)
        echo_archs FF_ACT_ARCHS_ALL
    ;;
    *)
        echo_usage
        exit 1
    ;;
esac

这个脚本也是仿照ijkplayer 里面的脚本写的，很简单 一句命令：

sh tools/do-compile-x264.sh armv7a

注意一点，就是这个脚本会调用第一个脚本路径一定要配对！！！还有一个脚本就更简单了！！

export ANDROID_NDK=/Users/cievon/Documents/AndroidSDK/android-ndk-r10e/
cd  contrib
FF_ARCH=$1
./compile-x264.sh $FF_ARCH

把这几行生成一个脚本，里面会去调用上面第二个脚本，后面可以指定参数！如我的这个脚本名字 compile.sh
到这个目录下面执行 ：结果会编译出所有五个平台的 include 和 lib

 ./compile.sh  all   ```
 ./compile.sh  all32   或者  ./compile.sh  arm64 

很简单！ ！！ 其实这三个脚本只是为了方便编译多平台的时候参数配置麻烦，如果大家一下子不明白，可以参考我的上篇日记 https://www.jianshu.com/p/67b733fcded0， 每一个平台搞一套源码目录，里面新建对应的平台脚本，然后执行： ./（你的脚本名称），也能生成你的 头文件，库文件，pc文件，都在源码的当前目录下，用的时候，你需要手动copy到你用的地方去！！！ 容易理解，但是效率太低！！！！
欢迎FFmpeg大神 戳我liugstick@163.com!!!!!