环境：
ubuntu10.04 64位
ndk 8e
这里要非常注意，一定要NDK8，开始也是下最新版本的9 b，结果一堆问题。
需要安装：
- autoconf
- autoconf-archive
- automake
- pkg-config
- git
- svn
ubuntu使用 sudo apt-get install 安装吧
Before start
if you have a problem with certificate add GIT_SSL_NO_VERIFY=true before git submodule update line
GIT_SSL_NO_VERIFY=true git submodule update
Im sorry about this certificate issue, but never is enough time to fix problems like those
If (only if) you have ssh key in appunite review system you should setup global alias in ~/.gitconfig file.
git config --global url.ssh://review.appunite.com.insteadOf https://review.appunite.com
Go to the work
downloading source code
git clone https://review.appunite.com/androidffmpeg AndroidFFmpeg
cd AndroidFFmpeg
git submodule init
git submodule sync #if you are updating source code
git submodule update
cd FFmpegLibrary
cd jni
download libyuv
# I hate svn too :)
svn checkout http://libyuv.googlecode.com/svn/trunk/ libyuv
setup freetype environemtn
cd freetype
./autogen.sh
cd ..
setup fribidi environemtn
cd fribidi
autoreconf -ivf
cd ..
setup libass environemtn
cd libass
autoreconf -ivf
cd ..
setup vo-aacenc environment
cd vo-aacenc
autoreconf
cd ..
setup vo-amrwbenc environment
cd vo-amrwbenc
autoreconf
cd ..
build external libraries
export NDK=/your/path/to/android-ndk
./build_android.sh
执行上面的脚步，一般会出现错误：
最经常出现的错误就是在64位的ubuntu下了
一会x86，一会x86_64
make sure that files FFmpegLibrary/jni/ffmpeg-build/{armeabi,armeabi-v7a,x86}/libffmpeg.so was created, otherwise you are in truble
build ndk jni library
ndk-build
make sure that files FFmpegLibrary/libs/{armeabi,armeabi-v7a,x86}/libffmpeg.so was created, otherwise you are in truble
build your project
android update lib-project -p FFmpegLibrary
android update project -p FFmpegExample
cd FFmpegExample
ant debug
ant installd
总之过程需要等待不少时间，需要耐心。。。
参考来源：https://github.com/appunite/AndroidFFmpeg/tree/master
最后顺带上传已经编译好的项目：