android平台ffmpeg编译流程

环境 ubuntu 14.04 LTS
资源文件
下载ffmpeg源码： http://www.ffmpeg.org/download.html
下载linux版ndk： http://developer.android.com/ndk/downloads/index.html（64位）
 1 修改 
 
进入到ffmpeg目录，打开configure文件，找到以下几行：
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)'
替换为


SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
SLIB_INSTALL_LINKS='$(SLIBNAME)'

2 编写.sh文件（需unix 编码,取巧办法是copy ffpemg 目录下version.sh，再新建一个）
#!/bin/bash
NDK=/home/yzq/桌面/android-ndk-r14b
PLATFORM=$NDK/platforms/android-9/arch-arm/
PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64


function build_one
{
./configure --target-os=linux \
    --prefix=$PREFIX \
    --extra-libs="-lgcc" \
    --arch=arm \
    --enable-version3 \
    --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
    --nm=$PREBUILT/bin/arm-linux-androideabi-nm \
    --enable-cross-compile \
    --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
    --sysroot=$PLATFORM \
    --extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS " \
    --disable-shared \
    --enable-static \
    --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog" \
    --disable-avdevice \
    --disable-parsers \
    --disable-encoders  \
    --disable-decoders \
    --disable-muxers \
    --disable-debug \
    --disable-ffmpeg \
    --disable-ffplay \
    --disable-ffprobe \
    --disable-ffserver \
    --disable-avdevice \
    --disable-symver \
    --disable-demuxers \
    --disable-ffplay \
    --disable-ffprobe \
    --disable-ffserver \
    --enable-pthreads \
    --enable-decoder=h264  \
    --enable-decoder=hevc  \
    --enable-decoder=mpeg4  \
    --enable-encoder=mpeg4  \
    --enable-demuxer=h264 \
    --enable-muxer=mp4 \
    --enable-protocol=file  \
    --enable-asm \
    $ADDITIONAL_CONFIGURE_FLAG




$PREBUILT/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o


$PREBUILT/bin/arm-linux-androideabi-ld \
    -rpath-link=$PLATFORM/usr/lib \
    -L$PLATFORM/usr/lib \
    -L$PREFIX/lib \
    -soname libffmpeg.so -shared -nostdlib -Bsymbolic --whole-archive --no-undefined -o \
    $PREFIX/libffmpeg.so \
    $PREFIX/lib/libavcodec.a  $PREFIX/lib/libswscale.a \
    $PREFIX/lib/libavformat.a $PREFIX/lib/libavutil.a \
    $PREFIX/lib/libswresample.a $PREFIX/lib/libavfilter.a\
    -lc -lm -lz -ldl -llog --dynamic-linker=/system/bin/linker \
    $PREBUILT/lib/gcc/arm-linux-androideabi/4.9.x/libgcc.a  
}


#arm v6
#CPU=armv6
#OPTIMIZE_CFLAGS="-marm -march=$CPU"
#PREFIX=../android/$CPU
#ADDITIONAL_CONFIGURE_FLAG=
#build_one


#arm v7vfpv3
#CPU=armv7-a
#OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU "
#PREFIX=../android/$CPU
#ADDITIONAL_CONFIGURE_FLAG=
#build_one


#arm v7vfp
#CPU=armv7-a
#OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU "
#PREFIX=../android/$CPU-vfp
#ADDITIONAL_CONFIGURE_FLAG=
#build_one


#arm v7n
CPU=armv7-a
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=neon -marm -march=$CPU -mvectorize-with-neon-quad -mtune=cortex-a8 -I$PLATFORM/usr/include"
PREFIX=../android/$CPU
ADDITIONAL_CONFIGURE_FLAG="--enable-neon --cpu=cortex-a8"
build_one




make clean
make -j4
make install
#arm v6+vfp
#CPU=armv6
#OPTIMIZE_CFLAGS="-DCMP_HAVE_VFP -mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU"
#PREFIX=../android/${CPU}_vfp
#ADDITIONAL_CONFIGURE_FLAG=
#build_one


3 执行 /.ffpeng.sh 完成编译


编译成单个文件
  按照ffpenmg.sh进行编译
  裁剪ffpemg到自己所需部分（配置configure 参数部分）