Building ffmpeg executable on Android

Current versions of build scripts do not create ffmpeg and ffprobe binaries but it is possible to generate them by applying the following changes.

In build/android-ffmpeg.sh

1. Delete --disable-programs line

2. Change --disable-static line to --enable-static

3. Change --enable-shared line to --disable-shared

After applying these changes, android.sh will fail building mobile-ffmpeg.

Building arm-v7a-neon platform on API level 24

ffmpeg: ok

Building arm64-v8a platform on API level 24

ffmpeg: ok

Building x86 platform on API level 24

ffmpeg: ok

Building x86-64 platform on API level 24

ffmpeg: ok

mobile-ffmpeg: failed

You will see the following logs in your build.log file. Just ignore them, because they are about building mobile-ffmpeg, you can find ffmpeg and ffprobe binaries under the prebuilt/android-<arch>/ffmpeg/bin path.

Android NDK: ERROR:jni/ffmpeg/Android.mk:avcodec: LOCAL_SRC_FILES points to a missing file    
Android NDK: Check that jni/ffmpeg/../../../prebuilt/android-arm/ffmpeg/lib/libavcodec.so exists  or that its path is correct   

Please note that openh264, snappy, tesseract and x265 libraries need to be linked with a c++ library and scripts are configured to use libc++_shared.so. So if you enable them, you need to copy libc++_shared.so as well.