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=$PLATFOR
4000
M/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）