mac下FFmpeg交叉编译生成Android平台下的so库

准备工作mac OS下编译、安装FFmpeg

我用的版本是ffmpeg-4.0.2,可以从这个上面下载相应的版本

ndk:android-ndk-r10e

NDK 下载地址，里面有多个版本的 DNK

链接:https://pan.baidu.com/s/1R3bmUfiwf3eGft_mpD22dg 密码: flvb

把下面脚本复制到sh文件中，在ffmpeg源码的根目下运行

chmod u+x build_android.sh 

./build_android.sh

build_android.sh

PREFIX=android-build

#设置你自己的NDK位置
NDK_HOME=/Users/binny/Library/Android/android-ndk-r10e
#设置你自己的平台，这上Mac上的，linux换成linux-x86_64
NDK_HOST_PLATFORM=darwin-x86_64

COMMON_OPTIONS="\
    --target-os=android \
    --disable-static \
    --enable-shared \
    --enable-small \
    --disable-programs \
    --disable-ffmpeg \
    --disable-ffplay \
    --disable-ffprobe \
    --disable-doc \
    --disable-symver \
    --disable-asm \
    "

function build_android {
    ./configure \
    --libdir=${PREFIX}/libs/armeabi-v7a \
    --incdir=${PREFIX}/includes/armeabi-v7a \
    --pkgconfigdir=${PREFIX}/pkgconfig/armeabi-v7a \
    --arch=arm \
    --cpu=armv7-a \
    --cross-prefix="${NDK_HOME}/toolchains/arm-linux-androideabi-4.9/prebuilt/${NDK_HOST_PLATFORM}/bin/arm-linux-androideabi-" \
    --sysroot="${NDK_HOME}/platforms/android-19/arch-arm/" \
    --extra-cflags="-march=armv7-a -mfloat-abi=softfp -mfpu=neon" \
    --extra-ldexeflags=-pie \
    ${COMMON_OPTIONS}
    make clean
    make -j8 && make install

    ./configure \
    --libdir=${PREFIX}/libs/arm64-v8a \
    --incdir=${PREFIX}/includes/arm64-v8a \
    --pkgconfigdir=${PREFIX}/pkgconfig/arm64-v8a \
    --arch=aarch64 \
    --cpu=armv8-a \
    --cross-prefix="${NDK_HOME}/toolchains/aarch64-linux-android-4.9/prebuilt/${NDK_HOST_PLATFORM}/bin/aarch64-linux-android-" \
    --sysroot="${NDK_HOME}/platforms/android-21/arch-arm64/" \
    --extra-ldexeflags=-pie \
    ${COMMON_OPTIONS} 
    make clean
    make -j8 && make install

    ./configure \
    --libdir=${PREFIX}/libs/arm64-v8a \
    --incdir=${PREFIX}/includes/arm64-v8a \
    --pkgconfigdir=${PREFIX}/pkgconfig/arm64-v8a \
    --arch=aarch64 \
    --cpu=armv8-a \
    --cross-prefix="${NDK_HOME}/toolchains/aarch64-linux-android-4.9/prebuilt/${NDK_HOST_PLATFORM}/bin/aarch64-linux-android-" \
    --sysroot="${NDK_HOME}/platforms/android-21/arch-arm64/" \
    --extra-ldexeflags=-pie \
    ${COMMON_OPTIONS} 
    make clean
    make -j8 && make install

    ./configure \
    --libdir=${PREFIX}/libs/x86 \
    --incdir=${PREFIX}/includes/x86 \
    --pkgconfigdir=${PREFIX}/pkgconfig/x86 \
    --arch=x86 \
    --cpu=i686 \
    --cross-prefix="${NDK_HOME}/toolchains/x86-4.9/prebuilt/${NDK_HOST_PLATFORM}/bin/i686-linux-android-" \
    --sysroot="${NDK_HOME}/platforms/android-19/arch-x86/" \
    --extra-ldexeflags=-pie \
    ${COMMON_OPTIONS} 
    make clean
    make -j8 && make install

    ./configure \
    --libdir=${PREFIX}/libs/x86_64 \
    --incdir=${PREFIX}/includes/x86_64 \
    --pkgconfigdir=${PREFIX}/pkgconfig/x86_64 \
    --arch=x86_64 \
    --cpu=x86_64 \
    --cross-prefix="${NDK_HOME}/toolchains/x86_64-4.9/prebuilt/${NDK_HOST_PLATFORM}/bin/x86_64-linux-android-" \
    --sysroot="${NDK_HOME}/platforms/android-21/arch-x86_64/" \
    --extra-ldexeflags=-pie \
    ${COMMON_OPTIONS}
    make clean
    make -j8 && make install
};

build_android

生成结果如下

532A382E-CE5C-459F-9A64-B6ACFFC065A8.png

使用tree 命令查看一下目录结构

image.png

问题

权限拒绝，加一个sudo

nasm/yasm not found or too old. Use --disable-x86asm for a crippled build.

brew install yasm