NDKFFmpeg

This repository is an example of using FFmpeg to compress video.

Build steps

Refer this guide in FFmpeg wiki, recommended to use ffmpeg-android-maker, see details below.

1. Install Android Studio. If you do not need it, install command line tools only.

2. Install latest NDK and export environment variables.

   sdkmanager "ndk;${ndk_version}" # For command line tools only
   export ANDROID_SDK_HOME=/path/to/Android_sdk
   export ANDROID_NDK_HOME=${ANDROID_SDK_HOME}/ndk/${ndk_version}

3. Clone ffmpeg-android-maker repository and build.

   git clone https://github.com/Javernaut/ffmpeg-android-maker
   cd ffmpeg-android-maker
   export FFMPEG_ANDROID=`pwd`
   ./ffmpeg-android-maker.sh

4. The .so files are located in ${FFMPEG_ANDROID}/build/ffmpeg/${ANDROID_ABI}/lib, copy them to the project.

   cd /path/to/NDKFFmpeg
   mkdir -p app/src/main/jniLibs/${ANDROID_ABI}
   cp /path/to/*.so app/src/main/jniLibs/${ANDROID_ABI}

5. Locate the source code of FFmpeg.

   • If compile this project on the same machine used to compile FFmpeg, the source is located at ${FFMPEG_ANDROID}/source/ffmpeg/ffmpeg-${ffmpeg_version}
   • If compile this project on another machine, download source code of FFmpeg.

6. Set FFMPEG_SOURCE_DIR to ensure that CMake can work.

   export FFMPEG_SOURCE_DIR=/path/to/ffmpeg_source
   cd ${FFMPEG_SOURCE_DIR}
   rm VERSION # This file will cause error

   Remember to copy the following missing headers if compile this project on another machine.

   config.h libavutil/avconfig.h libavutil/ffversion.h
   

7. Open the project with Android Studio, build and run.