使用Android Studio开发FFmpeg的正确姿势

  • 2018-04-21: update ffmpeg-4.0.
  • 2018-11-16: update script.
  • 2019-03-11: update script, add armeabi abi support.
  • 2019-04-03: update script, use android-ndk-r15c
  • 2019-04-25: update script, update ffmpeg to 4.0.4, add build_ffmpeg.sh
  • 2019-04-28: update script, update ffmpeg to 4.1.3, use android-ndk-r17c, armeabi update to armv6.
  • 2020-03-15: Update script, update ffmpeg to 4.2.2, use ndk 21, remove armeabi

使用AndroidStudio 开发 FFmpeg
Keywords: gradle, cmake
关键步骤，编译FFmpeg，Android Studio 集成。

abi support: armeabi-v7a arm64-v8a x86 x86_64
ndk version: ndk 21
ffmpeg: 4.2.2

第一步，编译ffmpeg

首先下载并解压

wget https://ffmpeg.org/releases/ffmpeg-4.2.2.tar.bz2
tar xvf ffmpeg-4.2.2.tar.bz2

然后编写编译脚本

#!/usr/bin/env bash

NDK_PATH=/Android/Sdk/ndk/21.0.6113669
HOST_PLATFORM_WIN=windows-x86_64
HOST_PLATFORM=$HOST_PLATFORM_WIN
API=29

TOOLCHAINS="$NDK_PATH/toolchains/llvm/prebuilt/$HOST_PLATFORM"
SYSROOT="$NDK_PATH/toolchains/llvm/prebuilt/$HOST_PLATFORM/sysroot"
CFLAG="-D__ANDROID_API__=$API -Os -fPIC -DANDROID "
LDFLAG="-lc -lm -ldl -llog "

PREFIX=android-build

CONFIG_LOG_PATH=${PREFIX}/log
COMMON_OPTIONS=
CONFIGURATION=

build() {
  APP_ABI=$1
  echo "======== > Start build $APP_ABI"
  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"
    CROSS_PREFIX="$TOOLCHAINS/bin/arm-linux-androideabi-"
    EXTRA_CFLAGS="$CFLAG -mfloat-abi=softfp -mfpu=vfp -marm -march=$MARCH "
    EXTRA_LDFLAGS="$LDFLAG"
    EXTRA_OPTIONS="--enable-neon --cpu=$CPU "
    ;;
  arm64-v8a)
    ARCH="aarch64"
    TARGET=$ARCH-linux-android
    CC="$TOOLCHAINS/bin/$TARGET$API-clang"
    CXX="$TOOLCHAINS/bin/$TARGET$API-clang++"
    LD="$TOOLCHAINS/bin/$TARGET$API-clang"
    CROSS_PREFIX="$TOOLCHAINS/bin/$TARGET-"
    EXTRA_CFLAGS="$CFLAG"
    EXTRA_LDFLAGS="$LDFLAG"
    EXTRA_OPTIONS=""
    ;;
  x86)
    ARCH="x86"
    CPU="i686"
    MARCH="i686"
    TARGET=i686-linux-android
    CC="$TOOLCHAINS/bin/$TARGET$API-clang"
    CXX="$TOOLCHAINS/bin/$TARGET$API-clang++"
    LD="$TOOLCHAINS/bin/$TARGET$API-clang"
    CROSS_PREFIX="$TOOLCHAINS/bin/$TARGET-"
    EXTRA_CFLAGS="$CFLAG -march=$MARCH -mtune=intel -mssse3 -mfpmath=sse -m32"
    EXTRA_LDFLAGS="$LDFLAG"
    EXTRA_OPTIONS="--cpu=$CPU "
    ;;
  x86_64)
    ARCH="x86_64"
    CPU="x86-64"
    MARCH="x86_64"
    TARGET=$ARCH-linux-android
    CC="$TOOLCHAINS/bin/$TARGET$API-clang"
    CXX="$TOOLCHAINS/bin/$TARGET$API-clang++"
    LD="$TOOLCHAINS/bin/$TARGET$API-clang"
    CROSS_PREFIX="$TOOLCHAINS/bin/$TARGET-"
    EXTRA_CFLAGS="$CFLAG -march=$CPU -mtune=intel -msse4.2 -mpopcnt -m64"
    EXTRA_LDFLAGS="$LDFLAG"
    EXTRA_OPTIONS="--cpu=$CPU "
    ;;
  esac

  echo "-------- > Start clean workspace"
  make clean

  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=$LD"
  CONFIGURATION="$CONFIGURATION $EXTRA_OPTIONS"

  echo "-------- > Start config makefile with $CONFIGURATION --extra-cflags=${EXTRA_CFLAGS} --extra-ldflags=${EXTRA_LDFLAGS}"
  ./configure ${CONFIGURATION} \
  --extra-cflags="$EXTRA_CFLAGS" \
  --extra-ldflags="$EXTRA_LDFLAGS"

  echo "-------- > Start make $APP_ABI with -j8"
  make -j10

  echo "-------- > Start install $APP_ABI"
  make install
  echo "++++++++ > make and install $APP_ABI complete."

}

build_all() {

  COMMON_OPTIONS="$COMMON_OPTIONS --target-os=android"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-static"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-shared"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-protocols"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-cross-compile"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-optimizations"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-debug"
  COMMON_OPTIONS="$COMMON_OPTIONS --enable-small"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-doc"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-programs"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-ffmpeg"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-ffplay"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-ffprobe"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-symver"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-network"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-x86asm"
  COMMON_OPTIONS="$COMMON_OPTIONS --disable-asm"
  COMMON_OPTIONS="$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="$COMMON_OPTIONS --enable-avresample"
  COMMON_OPTIONS="$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"

  echo "COMMON_OPTIONS=$COMMON_OPTIONS"
  echo "PREFIX=$PREFIX"
  echo "CONFIG_LOG_PATH=$CONFIG_LOG_PATH"

  mkdir -p ${CONFIG_LOG_PATH}

  #    build $app_abi
  build "armeabi-v7a"
  build "arm64-v8a"
  build "x86"
  build "x86_64"
}

echo "-------- Start --------"

build_all

echo "-------- End --------"

此脚本实现了 armeabi-v7a,arm64-v8a,x86,x86_64 4个平台的编译。

  • 需要设置环境变量 $NDK_PATH 路径
  • --target-os=android指定android平台。
  • make install-libs 表示只安装so文件

编译完成结果：
lib

第二步，项目集成

  • 新建项目，增加C++支持。手动创建jniLibs文件夹
  • 然后将上一步生成的所有文件复制到jniLibs文件夹下面
    最终目录结构：
    project

    然后修改CMakeLists.txt文件，集成so。
cmake_minimum_required(VERSION 3.4.1)

find_library(log-lib log)
find_library(android-lib android)

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

set(JNI_LIBS_DIR ${CMAKE_SOURCE_DIR}/src/main/jniLibs)

add_library(avutil
            SHARED
            IMPORTED )
set_target_properties(avutil
                      PROPERTIES IMPORTED_LOCATION
                      ${JNI_LIBS_DIR}/${ANDROID_ABI}/libavutil.so )

add_library(avresample
            SHARED
            IMPORTED )
set_target_properties(avresample
                      PROPERTIES IMPORTED_LOCATION
                      ${JNI_LIBS_DIR}/${ANDROID_ABI}/libavresample.so )

add_library(swresample
            SHARED
            IMPORTED )
set_target_properties(swresample
                      PROPERTIES IMPORTED_LOCATION
                      ${JNI_LIBS_DIR}/${ANDROID_ABI}/libswresample.so )

add_library(swscale
            SHARED
            IMPORTED )
set_target_properties(swscale
                      PROPERTIES IMPORTED_LOCATION
                      ${JNI_LIBS_DIR}/${ANDROID_ABI}/libswscale.so )

add_library(avcodec
            SHARED
            IMPORTED )
set_target_properties(avcodec
                      PROPERTIES IMPORTED_LOCATION
                      ${JNI_LIBS_DIR}/${ANDROID_ABI}/libavcodec.so )

add_library(avformat
            SHARED
            IMPORTED )
set_target_properties(avformat
                      PROPERTIES IMPORTED_LOCATION
                      ${JNI_LIBS_DIR}/${ANDROID_ABI}/libavformat.so )

add_library(avfilter
            SHARED
            IMPORTED )
set_target_properties(avfilter
                      PROPERTIES IMPORTED_LOCATION
                      ${JNI_LIBS_DIR}/${ANDROID_ABI}/libavfilter.so )

add_library(avdevice
            SHARED
            IMPORTED )
set_target_properties(avdevice
                      PROPERTIES IMPORTED_LOCATION
                      ${JNI_LIBS_DIR}/${ANDROID_ABI}/libavdevice.so )

include_directories(${JNI_LIBS_DIR}/includes)

target_link_libraries(native-lib
                      avutil avresample swresample swscale avcodec avformat avfilter avdevice
                      ${log-lib} ${android-lib} )

简要说明：

最后再放出效果图：


FFPlayerDemo

示例代码：https://github.com/coopsrc/FFPlayerDemo

最后编辑于 ：
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