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macOs上ffmpeg带入libx264库交叉编译

news 2025/9/2 11:49:19

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/sysrootexport ANDROID_API=24
export AR=$TOOLCHAIN/bin/llvm-arexport LD=$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-stringsbuild_armv7(){echo "-------- > Start install build_armv7"export CC=$TOOLCHAIN/bin/armv7a-linux-androideabi$ANDROID_API-clangexport 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 ${EXTRA_CFLAGS}" \--extra-ldflags="" \make cleanmake -j4make install}build_armv8(){echo "-------- > Start install build_armv8"export CC=$TOOLCHAIN/bin/aarch64-linux-android$ANDROID_API-clangexport CXX=$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 ${EXTRA_CFLAGS}" \--extra-ldflags="" \make cleanmake -j4make install}build_x86(){echo "-------- > Start install build_x86"export CC=$TOOLCHAIN/bin/i686-linux-android$ANDROID_API-clangexport CXX=$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 ${EXTRA_CFLAGS}" \--extra-ldflags="" \make cleanmake -j4make install}build_x86_64(){echo "-------- > Start install build_x86_64"export CC=$TOOLCHAIN/bin/x86_64-linux-android$ANDROID_API-clangexport CXX=$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 cleanmake -j4make 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=${prefix}/includeName: x264
Description: H.264 (MPEG4 AVC) encoder library
Version: 0.165.3222
Libs: -L${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=$1echo "======== > Start build $APP_ABI"# 重置变量EXTRA_CFLAGS="$CFLAG"EXTRA_LDFLAGS="$LDFLAG"EXTRA_OPTIONS=""PKG_CONFIG_AVAILABLE=falsecase ${APP_ABI} inarmeabi-v7a)ARCH="arm"CPU="armv7-a"MARCH="armv7-a"TARGET=armv7a-linux-androideabiCC="$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" ]; thenecho "错误: 找不到x264共享库文件在 $X264_LIB"echo "请先编译x264库或检查路径是否正确"exit 1fi# 检查x264.pc文件是否存在local x264_pc_file="$X264_LIB/pkgconfig/x264.pc"if [ -f "$x264_pc_file" ]; thenecho "-------- > x264.pc found"# 尝试使用pkg-config获取正确的编译标志if pkg-config --exists x264; thenX264_CFLAGS=$(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 $X264_LIBS"PKG_CONFIG_AVAILABLE=trueelseecho "-------- > WARNING: pkg-config cannot find x264, using manual flags"EXTRA_CFLAGS="$EXTRA_CFLAGS -I$X264_INCLUDE"EXTRA_LDFLAGS="$EXTRA_LDFLAGS -L$X264_LIB -lx264"fielseecho "-------- > WARNING: x264.pc not found, using manual flags"EXTRA_CFLAGS="$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-androidCC="$TOOLCHAINS/bin/$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" ]; thenecho "错误: 找不到x264共享库文件在 $X264_LIB"exit 1fi# 手动添加x264标志EXTRA_CFLAGS="$EXTRA_CFLAGS -I$X264_INCLUDE"EXTRA_LDFLAGS="$EXTRA_LDFLAGS -L$X264_LIB -lx264";;x86)ARCH="x86"CPU="i686"TARGET=i686-linux-androidCC="$TOOLCHAINS/bin/$TARGET$API-clang"CXX="$TOOLCHAINS/bin/$TARGET$API-clang++"LD="$TOOLCHAINS/bin/$TARGET$API-clang"CROSS_PREFIX="$TOOLCHAINS/bin/i686-linux-android-"# 禁用不支持的选项EXTRA_OPTIONS="--disable-neon --disable-asm";;x86_64)ARCH="x86_64"CPU="x86_64"TARGET=x86_64-linux-androidCC="$TOOLCHAINS/bin/$TARGET$API-clang"CXX="$TOOLCHAINS/bin/$TARGET$API-clang++"LD="$TOOLCHAINS/bin/$TARGET$API-clang"CROSS_PREFIX="$TOOLCHAINS/bin/x86_64-linux-android-"# 禁用不支持的选项EXTRA_OPTIONS="--disable-neon";;esacecho "-------- > Start clean workspace"make clean > /dev/null 2>&1echo "-------- > Start build configuration"CONFIGURATION="$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"#libx264CONFIGURATION="$CONFIGURATION --enable-libx264"CONFIGURATION="$CONFIGURATION --enable-encoder=libx264"# nm 和 stripCONFIGURATION="$CONFIGURATION --nm=$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.logecho "-------- > Start make $APP_ABI with -j4"make -j4echo "-------- > Start install $APP_ABI"make installecho "++++++++ > 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 programsCOMMON_OPTIONS="$COMMON_OPTIONS --disable-ffmpeg"    # disable ffmpeg buildCOMMON_OPTIONS="$COMMON_OPTIONS --disable-ffplay"    # disable ffplay buildCOMMON_OPTIONS="$COMMON_OPTIONS --disable-ffprobe"   # disable ffprobe buildCOMMON_OPTIONS="$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"#libx264COMMON_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 --------"