【備忘】MAC環境編譯ffmpeg4.2.2

1、創建一個文件比如 build_for_andorid.sh, 複製粘貼下面的內容

#!/bin/bash
#這裏修改的是最低支持的android sdk版本（r20版本ndk中armv8a、x86_64最低支持21，armv7a、x86最低支持16）
API=29
# NDK的路徑，根據自己的安裝位置進行設置
export NDK=/Users/XXX/Library/Android/sdk/ndk-bundle
export SYSROOT=$NDK/platforms/android-29/arch-arm64
export TOOLCHAIN=$NDK/toolchains/llvm/prebuilt/darwin-x86_64/ # 這裏找到對應得文件
function build_android
{
#相當於Android中Log.i
echo "Compiling FFmpeg for $CPU"
./configure \
    --prefix=$PREFIX \
    --disable-neon \
    --disable-hwaccels \
    --disable-gpl \
    --disable-postproc \
    --enable-shared \
    --enable-jni \
    --disable-mediacodec \
    --disable-decoder=h264_mediacodec \
    --disable-static \
    --disable-doc \
    --disable-ffmpeg \
    --disable-ffplay \
    --disable-ffprobe \
    --disable-avdevice \
    --disable-doc \
    --disable-symver \
    --cross-prefix=$CROSS_PREFIX \
    --target-os=android \
    --arch=$ARCH \
    --cpu=$CPU \
    --cc=$CC
    --cxx=$CXX
    --enable-cross-compile \
    --sysroot=$SYSROOT \
    --extra-cflags="-Os -fpic $OPTIMIZE_CFLAGS" \
    --extra-ldflags="$ADDI_LDFLAGS" \
    $ADDITIONAL_CONFIGURE_FLAG
make clean
make
make install
echo "The Compilation of FFmpeg for $CPU is completed"
}

# #armv8-a
ARCH=arm64
CPU=armv8-a
CC=$TOOLCHAIN/bin/aarch64-linux-android$API-clang
CXX=$TOOLCHAIN/bin/aarch64-linux-android$API-clang++
SYSROOT=$NDK/toolchains/llvm/prebuilt/linux-x86_64/sysroot
CROSS_PREFIX=$TOOLCHAIN/bin/aarch64-linux-android-
PREFIX=$(pwd)/android/$CPU
OPTIMIZE_CFLAGS="-march=$CPU"
build_android

##armv7-a
# ARCH=arm
# CPU=armv7-a
# CC=$TOOLCHAIN/bin/armv7a-linux-androideabi$API-clang
# CXX=$TOOLCHAIN/bin/armv7a-linux-androideabi$API-clang++
# SYSROOT=$NDK/toolchains/llvm/prebuilt/linux-x86_64/sysroot
# CROSS_PREFIX=$TOOLCHAIN/bin/arm-linux-androideabi-
# PREFIX=$(pwd)/android/$CPU
# OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU"
# OUTPUT=build
# build_android

# #x86
# ARCH=x86
# CPU=x86
# CC=$TOOLCHAIN/bin/i686-linux-android$API-clang
# CXX=$TOOLCHAIN/bin/i686-linux-android$API-clang++
# SYSROOT=$NDK/toolchains/llvm/prebuilt/linux-x86_64/sysroot
# CROSS_PREFIX=$TOOLCHAIN/bin/i686-linux-android-
# PREFIX=$(pwd)/android/$CPU
# OPTIMIZE_CFLAGS="-march=i686 -mtune=intel -mssse3 -mfpmath=sse -m32"
# build_android

# #x86_64
# ARCH=x86_64
# CPU=x86-64
# CC=$TOOLCHAIN/bin/x86_64-linux-android$API-clang
# CXX=$TOOLCHAIN/bin/x86_64-linux-android$API-clang++
# SYSROOT=$NDK/toolchains/llvm/prebuilt/linux-x86_64/sysroot
# CROSS_PREFIX=$TOOLCHAIN/bin/x86_64-linux-android-
# PREFIX=$(pwd)/android/$CPU
# OPTIMIZE_CFLAGS="-march=$CPU -msse4.2 -mpopcnt -m64 -mtune=intel"
# build_android

2、把build_for_andorid.sh放入ffmpeg源碼根目錄（如ffmpeg4.2.2） 文件夾中

3、添加build_for_andorid.sh的可執行權限

chmod +x build_for_android.sh

4、運行構建腳本

./build_for_android.sh

5、構建完成

INSTALL	libavutil/timestamp.h
INSTALL	libavutil/tree.h
INSTALL	libavutil/twofish.h
INSTALL	libavutil/version.h
INSTALL	libavutil/xtea.h
INSTALL	libavutil/tea.h
INSTALL	libavutil/tx.h
INSTALL	libavutil/lzo.h
INSTALL	libavutil/avconfig.h
INSTALL	libavutil/ffversion.h
INSTALL	libavutil/libavutil.pc
The Compilation of FFmpeg for armv7-a is completed

6、在源碼根目錄下的android文件夾（ffmpeg4.2.2/android）中可找到構建出的動態庫和頭文件

動態庫和頭文件下載