macOs上ffmpeg带入libx264库交叉编译

发布于：2025-08-31 ⋅ 阅读:(16) ⋅ 点赞:(0)

        本次编译是MacBookPro macOs14.6.1 (23G93)上进行的。

一 .下载libx264源代码：

        libx264的github地址为： https://code.videolan.org/videolan/x264.git

        用git下载到本地：

    git clone https://code.videolan.org/videolan/x264.git

二.NDK的配置及路径查找：

        在这里之前文章已经描述了从android studio下载及查找的路径的方法，这里不再赘述。

        感兴趣的可以移步博客：macOs上交叉编译ffmpeg及安装ffmpeg工具_ffmpeg macos-CSDN博客

三.创建编译脚本android_x264.sh ：

        1.编写编译脚本：

        在“一”中git下载的目录路径在创建一个android_x264.sh的脚本：

    sudo vim android_x264.sh

        加入如下的脚本代码：

#!/bin/bash
# macOS平台下用于android平台NDK为android-ndk-r27c交叉编译X264的脚本
 
# NDK所在目录
export NDK=/Users/wangyao/Library/Android/sdk/ndk/25.1.8937393 # tag1 
export TOOLCHAIN=$NDK/toolchains/llvm/prebuilt/darwin-x86_64
export SYSROOT=$NDK/toolchains/llvm/prebuilt/darwin-x86_64/sysroot

export ANDROID_API=24
export AR=$TOOLCHAIN/bin/llvm-ar

export LD=$TOOLCHAIN/bin/ld
export RANLIB=$TOOLCHAIN/bin/llvm-ranlib
export STRIP=$TOOLCHAIN/bin/llvm-strip
export NM=$TOOLCHAIN/bin/llvm-nm
#export STRINGS=$TOOLCHAIN/llvm-strings


build_armv7(){
  echo "-------- > Start install build_armv7"
  export CC=$TOOLCHAIN/bin/armv7a-linux-androideabi$ANDROID_API-clang
  export CXX=$TOOLCHAIN/bin/armv7a-linux-androideabi$ANDROID_API-clang++
  
    #编译选项
  EXTRA_CFLAGS="-march=armv7-a -D__ANDROID__"
  
  
  PREFIX=`pwd`/android/arm-v7a
  
  # 配置和编译
  ./configure \
  --host=armv7a-linux-androideabi \
  --sysroot=${SYSROOT} \
  --prefix=${PREFIX} \
  --enable-shared \
  --enable-static \
  --disable-asm \
  --chroma-format=all \
  --enable-pic \
  --enable-strip \
  --disable-cli \
  --disable-win32thread \
  --disable-avs \
  --disable-swscale \
  --disable-lavf \
  --disable-ffms \
  --disable-gpac \
  --disable-lsmash \
  --extra-cflags="-Os -fpic ${EXTRA_CFLAGS}" \
  --extra-ldflags="" \

  make clean
  make -j4
  make install

}

build_armv8(){

  echo "-------- > Start install build_armv8"
  
  export CC=$TOOLCHAIN/bin/aarch64-linux-android$ANDROID_API-clang
  export CXX=$TOOLCHAIN/bin/aarch64-linux-android$ANDROID_API-clang++
  
  #编译选项
EXTRA_CFLAGS="-march=armv8-a -D__ANDROID__"
  
  PREFIX=`pwd`/android/arm64-v8a
  # 配置和编译
  ./configure \
  --host=aarch64-linux-android \
  --sysroot=${SYSROOT} \
  --prefix=${PREFIX} \
  --enable-shared \
  --enable-static \
  --disable-asm \
  --chroma-format=all \
  --enable-pic \
  --enable-strip \
  --disable-cli \
  --disable-win32thread \
  --disable-avs \
  --disable-swscale \
  --disable-lavf \
  --disable-ffms \
  --disable-gpac \
  --disable-lsmash \
  --extra-cflags="-Os -fpic ${EXTRA_CFLAGS}" \
  --extra-ldflags="" \

  make clean
  make -j4
  make install

}


build_x86(){

  echo "-------- > Start install build_x86"
  
  export CC=$TOOLCHAIN/bin/i686-linux-android$ANDROID_API-clang
  export CXX=$TOOLCHAIN/bin/i686-linux-android$ANDROID_API-clang++
  
  #编译选项
  EXTRA_CFLAGS="-D__ANDROID__"
  
  PREFIX=`pwd`/android/x86
  # 配置和编译
  ./configure \
  --host=i686-linux-android \
  --sysroot=${SYSROOT} \
  --prefix=${PREFIX} \
  --enable-shared \
  --enable-static \
  --chroma-format=all \
  --disable-asm \
  --enable-pic \
  --enable-strip \
  --disable-cli \
  --disable-win32thread \
  --disable-avs \
  --disable-swscale \
  --disable-lavf \
  --disable-ffms \
  --disable-gpac \
  --disable-lsmash \
  --extra-cflags="-Os -fpic ${EXTRA_CFLAGS}" \
  --extra-ldflags="" \

  make clean
  make -j4
  make install

}


build_x86_64(){

  echo "-------- > Start install build_x86_64"
  export CC=$TOOLCHAIN/bin/x86_64-linux-android$ANDROID_API-clang
  export CXX=$TOOLCHAIN/bin/x86_64-linux-android$ANDROID_API-clang++
  
  #编译选项
  EXTRA_CFLAGS="-D__ANDROID__"
  
  PREFIX=`pwd`/android/x86_64
  # 配置和编译
  ./configure \
  --host=x86_64-linux-android \
  --sysroot=${SYSROOT} \
  --prefix=${PREFIX} \
  --enable-shared \
  --enable-static \
  --disable-asm \
  --chroma-format=all \
  --enable-pic \
  --enable-strip \
  --disable-cli \
  --disable-win32thread \
  --disable-avs \
  --disable-swscale \
  --disable-lavf \
  --disable-ffms \
  --disable-gpac \
  --disable-lsmash \
  --extra-cflags="-Os -fpic ${EXTRA_CFLAGS}" \
  --extra-ldflags="" \

  make clean
  make -j4
  make install

}

build_armv7
build_armv8
build_x86
build_x86_64

        2.运行编译脚本：

    sudo sh android_x264.sh

        3.编译结果：

        编译完成后会生成arm-v7/arm64-v8a/x86/x86_64的结果：

        include中包含x264_config.h及x264.h的头文件

        lib中包含libx264.a/libx264.so/libx264.so.165的动态库，及pkgconfig。

        pkgconfig文件夹下包含一个x264.pc的配置文件，用于后面ffmpeg编译时传递给configure。内部链接时查找对应libx264头文件及库的配置。

        x264.pc的内容如下：

prefix=/Users/wangyao/ffmpeg/x264/x264/android/arm-v7a
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include

Name: x264
Description: H.264 (MPEG4 AVC) encoder library
Version: 0.165.3222
Libs: -L${exec_prefix}/lib -lx264 
Libs.private: -lm -ldl
Cflags: -I${prefix}/include -DX264_API_IMPORTS

        4.坑：

       虽然编译出了上述的编译结果，但后面把libx264加入ffmpeg交叉编译时。会有一个巨坑，就是libx264动态库的链接是链接到“libx264.so.165”而不是链接到“libx264.so”。

在android的动态库的链接时会报错“dlopen failed: library "libx264.so.165" not found”

        这就需要解决libx264库编译的问题:

        在x264的configure中把查找到“libx264.so.$API”替换成“libx264.so”。

        替换后在重新编译，完成的结果就不包含“libx264.so.165”：

四.FFmpeg加入libx264的编译：

        1.查找x264的编译结果目录路径：

        查找x264的编译结果include/lib及pkgconfig目录路径

        2.在ffmpeg的目录下创建android_ff_x264.sh脚本：

                

                加入如下的脚本代码：

#!/bin/bash
# 用于编译android平台的脚本

# NDK所在目录
NDK_PATH=/Users/wangyao/Library/Android/sdk/ndk/25.1.8937393 # tag1
# 主机平台
HOST_PLATFORM=darwin-x86_64
# minSdkVersion
API=24  # 提高到 API 24 以避免 fseeko64/ftello64 问题

TOOLCHAINS="$NDK_PATH/toolchains/llvm/prebuilt/$HOST_PLATFORM"
SYSROOT="$NDK_PATH/toolchains/llvm/prebuilt/$HOST_PLATFORM/sysroot"
# 生成 -fpic 与位置无关的代码
CFLAG="-D__ANDROID_API__=$API -Os -fPIC -DANDROID -D_FILE_OFFSET_BITS=64"
LDFLAG="-lc -lm -ldl -llog "

# 输出目录
PREFIX=$(pwd)/android
# 日志输出目录
CONFIG_LOG_PATH=${PREFIX}/log
# 公共配置
COMMON_OPTIONS=
# 交叉配置
CONFIGURATION=

# 创建必要的目录
mkdir -p ${PREFIX} ${CONFIG_LOG_PATH}

build() {
  APP_ABI=$1
  echo "======== > Start build $APP_ABI"
  
  # 重置变量
  EXTRA_CFLAGS="$CFLAG"
  EXTRA_LDFLAGS="$LDFLAG"
  EXTRA_OPTIONS=""
  PKG_CONFIG_AVAILABLE=false
  
  case ${APP_ABI} in
  armeabi-v7a)
    ARCH="arm"
    CPU="armv7-a"
    MARCH="armv7-a"
    TARGET=armv7a-linux-androideabi
    CC="$TOOLCHAINS/bin/$TARGET$API-clang"
    CXX="$TOOLCHAINS/bin/$TARGET$API-clang++"
    LD="$TOOLCHAINS/bin/$TARGET$API-clang"
    # 交叉编译工具前缀
    CROSS_PREFIX="$TOOLCHAINS/bin/arm-linux-androideabi-"
    
    # 设置pkg-config路径
    export PKG_CONFIG_PATH="/Users/wangyao/ffmpeg/x264/x264/android/arm-v7a/lib/pkgconfig"
    echo "-------- > PKG_CONFIG_PATH=$PKG_CONFIG_PATH"
    
    # 指定X264的库
    X264_INCLUDE="/Users/wangyao/ffmpeg/x264/x264/android/arm-v7a/include"
    X264_LIB="/Users/wangyao/ffmpeg/x264/x264/android/arm-v7a/lib"
    echo "-------- > X264_INCLUDE=$X264_INCLUDE"
    echo "-------- > X264_LIB=$X264_LIB"
    
    # 检查x264库是否存在
    if [ ! -f "$X264_LIB/libx264.so" ]; then
        echo "错误: 找不到x264共享库文件在 $X264_LIB"
        echo "请先编译x264库或检查路径是否正确"
        exit 1
    fi
    
    # 检查x264.pc文件是否存在
    local x264_pc_file="$X264_LIB/pkgconfig/x264.pc"
    if [ -f "$x264_pc_file" ]; then
        echo "-------- > x264.pc found"
        # 尝试使用pkg-config获取正确的编译标志
        if pkg-config --exists x264; then
            X264_CFLAGS=$(pkg-config --cflags x264)
            X264_LIBS=$(pkg-config --libs x264)
            echo "-------- > pkg-config found x264 successfully"
            echo "-------- > x264 CFLAGS: $X264_CFLAGS"
            echo "-------- > x264 LIBS: $X264_LIBS"
            EXTRA_CFLAGS="$EXTRA_CFLAGS $X264_CFLAGS"
            EXTRA_LDFLAGS="$EXTRA_LDFLAGS $X264_LIBS"
            PKG_CONFIG_AVAILABLE=true
        else
            echo "-------- > WARNING: pkg-config cannot find x264, using manual flags"
            EXTRA_CFLAGS="$EXTRA_CFLAGS -I$X264_INCLUDE"
            EXTRA_LDFLAGS="$EXTRA_LDFLAGS -L$X264_LIB -lx264"
        fi
    else
        echo "-------- > WARNING: x264.pc not found, using manual flags"
        EXTRA_CFLAGS="$EXTRA_CFLAGS -I$X264_INCLUDE"
        EXTRA_LDFLAGS="$EXTRA_LDFLAGS -L$X264_LIB -lx264"
    fi
    
    # 添加架构特定标志
    EXTRA_CFLAGS="$EXTRA_CFLAGS -mfloat-abi=softfp -mfpu=neon -marm -march=$MARCH"
    EXTRA_OPTIONS="--enable-neon --cpu=$CPU"
    ;;
    
  arm64-v8a)
    ARCH="aarch64"
    CPU="armv8-a"
    TARGET=aarch64-linux-android
    CC="$TOOLCHAINS/bin/$TARGET$API-clang"
    CXX="$TOOLCHAINS/bin/$TARGET$API-clang++"
    LD="$TOOLCHAINS/bin/$TARGET$API-clang"
    CROSS_PREFIX="$TOOLCHAINS/bin/aarch64-linux-android-"
    
    # 设置pkg-config路径
    export PKG_CONFIG_PATH="/Users/wangyao/ffmpeg/x264/x264/android/arm64-v8a/lib/pkgconfig"
    
    # 指定X264的库
    X264_INCLUDE="/Users/wangyao/ffmpeg/x264/x264/android/arm64-v8a/include"
    X264_LIB="/Users/wangyao/ffmpeg/x264/x264/android/arm64-v8a/lib"
    
    # 检查x264库是否存在
    if [ ! -f "$X264_LIB/libx264.so" ]; then
        echo "错误: 找不到x264共享库文件在 $X264_LIB"
        exit 1
    fi
    
    # 手动添加x264标志
    EXTRA_CFLAGS="$EXTRA_CFLAGS -I$X264_INCLUDE"
    EXTRA_LDFLAGS="$EXTRA_LDFLAGS -L$X264_LIB -lx264"
    ;;
    
  x86)
    ARCH="x86"
    CPU="i686"
    TARGET=i686-linux-android
    CC="$TOOLCHAINS/bin/$TARGET$API-clang"
    CXX="$TOOLCHAINS/bin/$TARGET$API-clang++"
    LD="$TOOLCHAINS/bin/$TARGET$API-clang"
    CROSS_PREFIX="$TOOLCHAINS/bin/i686-linux-android-"
    
    # 禁用不支持的选项
    EXTRA_OPTIONS="--disable-neon --disable-asm"
    ;;
    
  x86_64)
    ARCH="x86_64"
    CPU="x86_64"
    TARGET=x86_64-linux-android
    CC="$TOOLCHAINS/bin/$TARGET$API-clang"
    CXX="$TOOLCHAINS/bin/$TARGET$API-clang++"
    LD="$TOOLCHAINS/bin/$TARGET$API-clang"
    CROSS_PREFIX="$TOOLCHAINS/bin/x86_64-linux-android-"
    
    # 禁用不支持的选项
    EXTRA_OPTIONS="--disable-neon"
    ;;
    
  esac

  echo "-------- > Start clean workspace"
  make clean > /dev/null 2>&1

  echo "-------- > Start build configuration"
  CONFIGURATION="$COMMON_OPTIONS"
  CONFIGURATION="$CONFIGURATION --logfile=$CONFIG_LOG_PATH/config_$APP_ABI.log"
  CONFIGURATION="$CONFIGURATION --prefix=$PREFIX"
  CONFIGURATION="$CONFIGURATION --libdir=$PREFIX/libs/$APP_ABI"
  CONFIGURATION="$CONFIGURATION --incdir=$PREFIX/includes/$APP_ABI"
  CONFIGURATION="$CONFIGURATION --pkgconfigdir=$PREFIX/pkgconfig/$APP_ABI"
  CONFIGURATION="$CONFIGURATION --cross-prefix=$CROSS_PREFIX"
  CONFIGURATION="$CONFIGURATION --arch=$ARCH"
  CONFIGURATION="$CONFIGURATION --sysroot=$SYSROOT"
  CONFIGURATION="$CONFIGURATION --cc=$CC"
  CONFIGURATION="$CONFIGURATION --cxx=$CXX"
  CONFIGURATION="$CONFIGURATION --ld=$LD"
  #libx264
  CONFIGURATION="$CONFIGURATION --enable-libx264"
  CONFIGURATION="$CONFIGURATION --enable-encoder=libx264"
  # nm 和 strip
  CONFIGURATION="$CONFIGURATION --nm=$TOOLCHAINS/bin/llvm-nm"
  CONFIGURATION="$CONFIGURATION --strip=$TOOLCHAINS/bin/llvm-strip"
  CONFIGURATION="$CONFIGURATION $EXTRA_OPTIONS"
  

  
  echo "-------- > Start config makefile with $CONFIGURATION"
  echo "-------- > Extra CFLAGS: $EXTRA_CFLAGS"
  echo "-------- > Extra LDFLAGS: $EXTRA_LDFLAGS"
  
  ./configure ${CONFIGURATION} \
    --extra-cflags="$EXTRA_CFLAGS" \
    --extra-ldflags="$EXTRA_LDFLAGS" \
    --pkg-config=$(which pkg-config) 2>&1 | tee $CONFIG_LOG_PATH/configure_$APP_ABI.log
    
  echo "-------- > Start make $APP_ABI with -j4"
  make -j4
 
  echo "-------- > Start install $APP_ABI"
  make install
  
  echo "++++++++ > make and install $APP_ABI complete."
  return 0
}

build_all() {
  #配置开源协议声明
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-gpl"
  #目标android平台
  COMMON_OPTIONS="$COMMON_OPTIONS --target-os=android"
  #取消默认的静态库
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-static"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-shared"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-protocols"
  #开启交叉编译
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-cross-compile"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-optimizations"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-debug"
  #尽可能小
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-small"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-doc"
  #不要命令（执行文件）
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-programs"  # do not build command line programs
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-ffmpeg"    # disable ffmpeg build
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-ffplay"    # disable ffplay build
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-ffprobe"   # disable ffprobe build
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-symver"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-network"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-x86asm"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-vulkan"
  
  # 有条件地禁用asm，某些架构可能不支持
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-asm"
  
  #启用
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-pthreads"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-mediacodec"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-jni"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-zlib"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-pic"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-muxer=flv"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-decoder=h264"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-decoder=mpeg4"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-decoder=mjpeg"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-decoder=png"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-decoder=vorbis"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-decoder=opus"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-decoder=flac"
  
  #启用编码器
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-encoder=h264"
  
  #libx264
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-libx264"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-encoder=libx264"
  
  echo "COMMON_OPTIONS=$COMMON_OPTIONS"
  echo "PREFIX=$PREFIX"
  echo "CONFIG_LOG_PATH=$CONFIG_LOG_PATH"

  # 构建所有支持的架构
  build "armeabi-v7a" || echo "Failed to build armeabi-v7a"
  build "arm64-v8a" || echo "Failed to build arm64-v8a"
  # build "x86" || echo "Failed to build x86"
  # build "x86_64" || echo "Failed to build x86_64"
}

echo "-------- Start --------"
build_all
echo "-------- End --------"

                

        3.编译android_ff_x264.sh脚本：

     

                4.编译结果：

        在“/Users/wangyao/ffmpeg/ffmpeg-7.0.2/android”目录下即是编译的结果了：

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