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How to include ffmpeg in my jni folder and build .so file?

I have successfully build ffmpeg.
After that I have added the include.h files in my jni folder.
jni folder
My ffmpeg-jni.c file :
ffmpeg-jni.c
When I build ndk . It comes like this.
error in ndk-build
After adding common.h . It comes with another one error.
in command prompt
scroll 1
scroll 2
How can I solve this and build .so file?
These are my ffmpeg build files

How to generate armeabi-v7a of libassimp.so.4.1.0 for Assimp

I am using Assimp source code to generate Android ARM binary. After CMake it provide me x86_64 libassimp.so every time.
I am using Assimp Source code 4.1.0 and compile it using following steps -
1. Set up android toolchain
export NDK_PATH=/path/to/your/android/ndk/
not go to android-ndk-r8c\build\tools
run the command:
sh make-standalone-toolchain.sh –platform=android-8 –ndk-dir=$NDK_PATH –install-dir=/Android/sdk/android-toolchain –toolchain=arm-linux-androideabi-4.4.3
which will build file scripts of the toolchain
now run the command
export ANDROID_NDK_TOOLCHAIN=$HOME/Android/sdk/android-toolchain
and also
export ANDTOOLCHAIN=$HOME/Android/android-cmake/toolchain/android.toolchain.cmake
to the path need to add :
export PATH=$PATH:$HOME/Android/sdk/tools
export PATH=$PATH:$HOME/Android/sdk/platform-tools
export PATH=$PATH:$HOME/Android/sdk/android-toolchain/bin
so lets begin, download the last source of assimp library from http://assimp.sourceforge.net and open terminal(cygwin or mac terminal) , go to assimp directory and type :
mkdir buildandroid
cd buildandroid
cmake -DCMAKE_TOOLCHAIN_FILE=$ANDTOOLCHAIN -DENABLE_BOOST_WORKAROUND=ON -DCMAKE_INSTALL_PREFIX=/assimp-2.0 -DANDROID_ABI=armeabi-v7a _DANDROID_NATIVE_API_LEVEL=android-8 -DANDROID_FORCE_ARM_BUILD=TRUE ..
this will create files and folders in the build directory, now go to the file link.txt inside : buildandroid => code => cMakeFiles => assimp.dir => link.txt
search for the string -soname, libassimp.so.3 and remove the .3 from the extension of the library (if not it will make problems in loading later from the android)
do the same thing with file name relink.txt
now go back to the root directory of buildandroid and run :
make
process of building will begin, the shared library will be in parent lib folder and wll consist from symbolic links and so library which will called libassimp.so.version_number. remove the version number makeing the file name only be libassimp.so
In the end, I am getting x86_64 libassimp.so instead armeabi-v7a. Please let me know if anybody now, how to generate armeabi-v7a libassimp.so. Any help will be appreciated.

How does one Android NDK library without a Android Project

I would like to be able to build a shared library in using the android ndk-build script, but for some reason I get a bunch of errors:
# I have Application.mk and Android.mk in the current folder
ndk-build -C .
Android NDK: Could not find application project directory !
Android NDK: Please define the NDK_PROJECT_PATH variable to point to it.
Is there a way to build the Android shared library with only the source and header files?$$\int$$

Yes, you can write
ndk-build NDK_PROJECT_PATH=. APP_BUILD_SCRIPT=./Android.mk
But it's much easier to create ./jni directory and put both Application.mk and Android.mk there.

How to build libav using ndk-build in cygwin for windowds?

I want to know how to build libav on windows7 using cygwin. I've tried the following steps :
1-change the directory using cd command to libav_file_directory/android(android folder is empty where the .so file will be saved as far as my knowledge is concern).
2-execute the ./ndk-buil command.
I got the following as result:
*Android NDK: Could not find application project directory !
Android NDK: Please define the NDK_PROJECT_PATH variable to point to it.
/cygdrive/c/Users/balwant.singh.TA/Desktop/Android/android-ndk-r8/build/core/build-local.mk:130: * Android NDK: Aborting . Stop.*
plese reply with solution, and also I want to know which all android media player uses the libav as their native code.

1.)Set all your paths(Java_Home
2.)Set NDK_HOME to Ndk-Build Path
3.)Run Cygwin
4.)GO to project Library path
5.)Run make command
6.)then Run ndk-build

Build android project from command line

I would like to build and android project from command line on Linux. In the root directory of the project there are the following files and directories:
AndroidManifest.xml build.xml default.properties res/ src/
Can you provide a sample Makefile how to build this project?

Do you have 'ant' installed? Try ant debug

The build.xml file is input to the Ant program, which will build your project. Use "ant build"