Mac下面编译Android FFmpeg3.2.4

需要搞直播，打算使用ffmpeg进行推流，于是在Mac下进行了编译FFMmpeg。

1、下载ffmpeg源码，我下载的是ffmpeg-3.2.4；

2、配置好build_android.sh编译安卓脚本，脚本如下，

cd /Users/xxxx/Documents/DevTool/ffmpeg-3.2.4
NDK=/Users/xxxx/Documents/DevTool/AndroidSDK/android-sdk-macosx/ndk-bundle
SYSROOT=$NDK/platforms/android-9/arch-arm/
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64
function build_one{
./configure \
 --prefix=$PREFIX \
 --enable-shared \
 --disable-static \
 --disable-doc \
 --disable-ffmpeg \
 --disable-ffplay \
 --disable-ffprobe \
 --disable-ffserver \
 --disable-avdevice \
 --disable-doc \
 --disable-symver \
 --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
 --target-os=linux \
 --arch=arm \
 --enable-cross-compile \
 --sysroot=$SYSROOT \
 --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
 --extra-ldflags="$ADDI_LDFLAGS" \
 $ADDITIONAL_CONFIGURE_FLAG
 make clean
 make
 make install
}
CPU=arm
PREFIX=$(pwd)/android/$CPU 
ADDI_CFLAGS="-marm"
build_one

我这里选择的CPU的架构是arm，有其他需要可自行添加；

3、为脚本赋予可执行权限；

chmod -R 775 build_android.sh

4、执行脚本，经过一番编译等待之后，我这边编译了几遍大约在十五分钟编译完成；

5、打开AS，我的测试版本是AS 2.3版本，所以使用的是CMakelist.txt来进行编译的，把刚才编译好的源码复制到项目的libs下面；

6、编译CMakelist.txt文件，完整的如下；

//For more information about using CMake with Android Studio, read the
//documentation: https://d.android.com/studio/projects/add-native-code.html
//Sets the minimum version of CMake required to build the native library.

cmake_minimum_required(VERSION 3.4.1)

find_library( # Sets the name of the path variable.
              log-lib

              # Specifies the name of the NDK library that
              # you want CMake to locate.
              log )

set(distribution_DIR ${CMAKE_SOURCE_DIR}/../../../../libs)

add_library( avutil-55
             SHARED
             IMPORTED )
set_target_properties( avutil-55
                       PROPERTIES IMPORTED_LOCATION
                       ../../../../libs/arm/libavutil-55.so )

add_library( swresample-2
             SHARED
             IMPORTED )
set_target_properties( swresample-2
                       PROPERTIES IMPORTED_LOCATION
                       ../../../../libs/arm/libswresample-2.so )

add_library( avcodec-57
             SHARED
             IMPORTED )
set_target_properties( avcodec-57
                       PROPERTIES IMPORTED_LOCATION
                       ../../../../libs/arm/libavcodec-57.so )

add_library( avfilter-6
             SHARED
             IMPORTED)
set_target_properties( avfilter-6
                       PROPERTIES IMPORTED_LOCATION
                       ../../../../libs/arm/libavfilter-6.so )

add_library( swscale-4
             SHARED
             IMPORTED)
set_target_properties( swscale-4
                       PROPERTIES IMPORTED_LOCATION
                       ../../../../libs/arm/libswscale-4.so )

add_library( avformat-57
             SHARED
             IMPORTED)
set_target_properties( avformat-57
                       PROPERTIES IMPORTED_LOCATION
                       ../../../../libs/arm/libavformat-57.so )

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")

add_library( native-lib
             SHARED
             src/main/cpp/native-lib.cpp )

include_directories(libs/include)

//target_include_directories(native-lib PRIVATE libs/include)

target_link_libraries(native-lib
                     ${avutil-55}
                     ${swresample-2}
                     ${avcodec-57}
                     ${avfilter-6}
                     ${swscale-4}
                     ${avformat-57}
                     ${log-lib} )

7、编译运行，成功，明天就可以开撸直播了，哈哈，附上下载链接。