一、ffmpeg编译成android使用的so库

1.在https://ffmpeg.org/中下载ffmpeg源码(目前版本为ffmpeg-3.2.1)

2.下载ndk

3.分别解压ffmpeg和ndk， 路径如 ： 

ffmpeg路径：

/home/lx/Downloads/ffmpeg-3.2.1

ndk路径： 

/home/lx/Downloads/android-ndk-r13b

4.替换ffmpeg-3.2.1/configure 中的

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)'

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)'

5.在ffmpeg-3.2.1/目录下创建一个build_android文件，内容为

#!/bin/bash NDK=/home/lx/Downloads/android-ndk-r13b SYSROOT=$NDK/platforms/android-19/arch-arm/ TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64 CPU=arm ARCH=arm PREFIX=$(pwd)/android/$CPU ADDI_CFLAGS="-marm" export NDK export SYSROOT export TOOLCHAIN #注意下面的 \ 后面不要带空格 ./configure \ --prefix=$PREFIX \ --arch=$ARCH \ --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \ --extra-ldflags="$ADDI_LDFLAGS" \ --sysroot=$SYSROOT \ --extra-cflags="-Os -fpic $ADDI_CFLAGS" \ --target-os=linux \ --enable-cross-compile \ --enable-gpl \ --enable-shared \ --disable-static \ --disable-doc \ --enable-small \ --disable-programs \ --disable-ffmpeg \ --disable-ffplay \ --disable-ffprobe \ --disable-ffserver \ $ADDITIONAL_CONFIGURE_FLAG make make install

6.在命令行下添加可执行权限 chmod +x  build_android

7.在命令行下执行 ./build_android

8.生成的lib和include在 ffmpeg-3.2.1/如下 目录下

lx@ubt:~/Downloads/ffmpeg-3.2.1/android/arm$ ls include lib

lx@ubt:~/Downloads/ffmpeg-3.2.1/android/arm/include$ ls libavcodec libavdevice libavfilter libavformat libavutil libpostproc libswresample libswscale lx@ubt:~/Downloads/ffmpeg-3.2.1/android/arm/lib$ ls libavcodec-57.so libavdevice-57.so libavfilter-6.so libavformat-57.so libavutil-55.so libpostproc-54.so libswresample-2.so libswscale-4.so pkgconfig libavcodec.so libavdevice.so libavfilter.so libavformat.so libavutil.so libpostproc.so libswresample.so libswscale.so