Compile OpenH264 for Android

OpenH264
OpenH264 is a codec library which supports H.264 encoding and decoding.
The source code repository is hosted on github at https://github.com/cisco/openh264.
See http://www.openh264.org/ for more details.

Compile OpenH264 for Android (using Windows)

• In order to compile the openh264 the GNU Make (http://www.gnu.org/software/make/)utilityis required. Hence to provide make tool available on Windows, MSYS needs to be installed.

• To compile openh264 for Android (using Windows) the following are required –

1. MSYS (http://www.mingw.org/wiki/MSYS)
2. Android NDK (https://developer.android.com/tools/sdk/ndk/index.html) 
3. The openh264 source from github (https://github.com/cisco/openh264)

• Post installations, ensure that everything is installed correctly, try building sample projects available with Android NDK.

• Once everything successfully installed, go to the project directory and locate README.md file (https://github.com/cisco/openh264/blob/master/README.md) which explains parameters to compile openh264.

• The makefile (https://github.com/cisco/openh264/blob/master/Makefile) that is used to compile, is available in the project directory.

• After installing MSYS you should have a cyan "M" link on the Desktop. When you double-click on it, a terminal should be launched.

1. Navigate to project directory (using UNIX style commands)
2. Finally to compile use the following command make OS=android NDKROOT=/unix/path/to/ndk TARGET=9 libopenh264.so
3. NDKROOT=/d/Softwares/android-ndk-r10 (in my case)
4. All the libraries should be compiled post this command.

• Once all the libs are compiled, then these can be used to run the sample apps for encoding and decoding.

• The sample apps are available in codec/build/android folder (https://github.com/cisco/openh264/tree/master/codec/build/android)