FFmepg编译及集成到 Android

编译文件修改
打包so 执行
集成到Android

准备编译

采用ubuntu系统编译, 系统版本不影响

 apt-get update     apt-get install yasm     apt-get install pkg-config

安装 NDK 本文采用
ndk r15c 或 ndk r19
经测试，NDK版本影响不大，只要不是太低就好
ndk r15下载
ndk 最新版
下载FFmpeg 版本本文采用 ffmpeg3.4.5
曾采用4.1.3版本，但是脚本文件有些问题，网上查阅的并不好用，文章末尾提供4.1.3版本sh（不一定好用，需要修改）

修改 configure

SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'  LIB_INSTALL_EXTRA_CMD='$$(RANLIB)"$(LIBDIR)/$(LIBNAME)"'  SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'  SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR)$(SLIBNAME)'

x264脚本如果不需要，你需要将下方 ffmepg 脚本用的x264的地方加 # 下载 x264

#!/bin/bashNDK=/home/oblvion/Desktop/ffmpeg/android-ndk-r15cconfigure(){    CPU=$1    PREFIX=$(pwd)/android/$CPU    HOST=""    CROSS_PREFIX=""    SYSROOT=""    if [ "$CPU" == "armv7-a" ]    then        HOST=arm-linux        SYSROOT=$NDK/platforms/android-21/arch-arm/        CROSS_PREFIX=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-    else        HOST=aarch64-linux        SYSROOT=$NDK/platforms/android-21/arch-arm64/        CROSS_PREFIX=$NDK/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-    fi    ./configure \    --prefix=$PREFIX \    --host=$HOST \    --enable-pic \    --enable-static \    --enalbe-neon \    --extra-cflags="-fPIE -pie" \    --extra-ldflags="-fPIE -pie" \    --cross-prefix=$CROSS_PREFIX \    --sysroot=$SYSROOT}build(){    make clean    cpu=$1    echo "build $cpu"    configure $cpu    #-j    make -j4    make install}#build arm64build armv7-a

ffmpeg 脚本

#!/bin/bashNDK=/home/oblvion/Desktop/ffmpeg/android-ndk-r15cADDI_CFLAGS="-fPIE -pie"ADDI_LDFLAGS="-fPIE -pie"configure(){    CPU=$1    PREFIX=$(pwd)/android/$CPU    x264=$(pwd)/x264/android/$CPU    HOST=""    CROSS_PREFIX=""    SYSROOT=""    ARCH=""    if [ "$CPU" == "armv7-a" ]    then        ARCH="arm"        HOST=arm-linux        SYSROOT=$NDK/platforms/android-21/arch-arm/         CROSS_PREFIX=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-    else        ARCH="aarch64"        HOST=aarch64-linux        SYSROOT=$NDK/platforms/android-21/arch-arm64/        CROSS_PREFIX=$NDK/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-    fi    ./configure \    --prefix=$PREFIX \    --disable-encoders \    --disable-decoders \    --disable-avdevice \    --disable-static \    --disable-doc \    --disable-ffplay \    --disable-network \    --disable-doc \    --disable-symver \    --enable-neon \    --enable-shared \    --enable-libx264 \    --enable-gpl \    --enable-pic \    --enable-jni \    --enable-pthreads \    --enable-mediacodec \    --enable-encoder=aac \    --enable-encoder=gif \    --enable-encoder=libopenjpeg \    --enable-encoder=libmp3lame \    --enable-encoder=libwavpack \    --enable-encoder=libx264 \    --enable-encoder=mpeg4 \    --enable-encoder=pcm_s16le \    --enable-encoder=png \    --enable-encoder=srt \    --enable-encoder=subrip \    --enable-encoder=yuv4 \    --enable-encoder=text \    --enable-decoder=aac \    --enable-decoder=aac_latm \    --enable-decoder=libopenjpeg \    --enable-decoder=mp3 \    --enable-decoder=mpeg4_mediacodec \    --enable-decoder=pcm_s16le \    --enable-decoder=flac \    --enable-decoder=flv \    --enable-decoder=gif \    --enable-decoder=png \    --enable-decoder=srt \    --enable-decoder=xsub \    --enable-decoder=yuv4 \    --enable-decoder=vp8_mediacodec \    --enable-decoder=h264_mediacodec \    --enable-decoder=hevc_mediacodec \    --enable-hwaccel=h264_mediacodec \    --enable-hwaccel=mpeg4_mediacodec \    --enable-ffmpeg \    --enable-bsf=aac_adtstoasc \    --enable-bsf=h264_mp4toannexb \    --enable-bsf=hevc_mp4toannexb \    --enable-bsf=mpeg4_unpack_bframes \    --enable-cross-compile \    --cross-prefix=$CROSS_PREFIX \    --target-os=android \    --arch=$ARCH \    --sysroot=$SYSROOT \    --extra-cflags="-I$x264/include $ADDI_CFLAGS" \    --extra-ldflags="-L$x264/lib"}build(){    make clean    cpu=$1    echo "build $cpu"        configure $cpu    make -j4    make install}#build arm64build armv7-a

注意脚本需要 chmod +x build.sh ，然后 sudo ./脚本执行

这个时候你执行完脚本，如果幸运，能拿到 so文件了

准备集成到 ndk android 源码中

创建 NDK 项目
源码libs 目录下导入 so
导入include文件
修改 build.gradle 文件
编辑CMake文件

cmake_minimum_required(VERSION 3.4.1)set(lib_src_DIR ${CMAKE_SOURCE_DIR}/../../../libs/${ANDROID_ABI})add_library(        native-lib        SHARED        native-lib.cpp)add_library(        avcodec        SHARED        IMPORTED)set_target_properties(        avcodec        PROPERTIES IMPORTED_LOCATION        ${lib_src_DIR}/libavcodec.so)add_library(        avfilter        SHARED        IMPORTED)set_target_properties(        avfilter        PROPERTIES IMPORTED_LOCATION        ${lib_src_DIR}/libavfilter.so)add_library(        avformat        SHARED        IMPORTED)set_target_properties(        avformat        PROPERTIES IMPORTED_LOCATION        ${lib_src_DIR}/libavformat.so)add_library(        avutil        SHARED        IMPORTED)set_target_properties(        avutil        PROPERTIES IMPORTED_LOCATION        ${lib_src_DIR}/libavutil.so)add_library(        postproc        SHARED        IMPORTED)set_target_properties(        postproc        PROPERTIES IMPORTED_LOCATION        ${lib_src_DIR}/libpostproc.so)add_library(        swresample        SHARED        IMPORTED)set_target_properties(        swresample        PROPERTIES IMPORTED_LOCATION        ${lib_src_DIR}/libswresample.so)add_library(        swscale        SHARED        IMPORTED)set_target_properties(        swscale        PROPERTIES IMPORTED_LOCATION        ${lib_src_DIR}/libswscale.so)find_library(        log-lib        log)include_directories(${CMAKE_SOURCE_DIR}/src/main/cpp/include)target_link_libraries(        native-lib        avcodec        avfilter        avformat        avutil        postproc        swresample        swscale        ${log-lib})

修改原来的 natice-lib.cpp 文件

#include #include #include extern "C" {#include "include/libavcodec/avcodec.h"#include "include/libavfilter/avfilter.h"#include "include/libavformat/avformat.h"#include "include/libavutil/imgutils.h"#include "include/libswresample/swresample.h"#include "include/libswscale/swscale.h"#include "include/libx264/x264.h"}extern "C"JNIEXPORT jstring JNICALLJava_com_wmtc_ndktest_MainActivity_stringFromFFmpeg(        JNIEnv *env,        jobject /* this */) {    char info[10000] = {0};    sprintf(info, "%s\n", avcodec_configuration());    return env->NewStringUTF(info);}

OK。调用，执行，不出意外看到如下：

遇到的问题

ninja: error: xxxxxx missing and no known rule to make it
因为你的 CMake文件错误，检查一下

undefined reference to 'avcodec_configuration()'
看看是否 extern "C"是这样导入的源码文件

extern "C" {   #include "include/libavcodec/avcodec.h"   #include "include/libavfilter/avfilter.h"   #include "include/libavformat/avformat.h"   #include "include/libavutil/imgutils.h"   #include "include/libswresample/swresample.h"   #include "include/libswscale/swscale.h"   #include "include/libx264/x264.h"   }

感谢一下文章提供的帮助：

编译相关文章

FFmepg编译及CMake 集成到 Android

FFmepg编译及集成到 Android

准备编译

注意脚本需要 chmod +x build.sh ，然后 sudo ./脚本执行

准备集成到 ndk android 源码中

遇到的问题

感谢一下文章提供的帮助：

更多相关文章

随机推荐

FFmepg编译及CMake 集成到 Android

FFmepg编译及集成到 Android

准备编译

注意 脚本需要 chmod +x build.sh ，然后 sudo ./脚本执行

准备集成到 ndk android 源码中

遇到的问题

感谢一下文章提供的帮助 ：

更多相关文章

随机推荐

注意脚本需要 chmod +x build.sh ，然后 sudo ./脚本执行

感谢一下文章提供的帮助：