JNIEXPORT jboolean JNICALL Java_fr_enoent_videokit_Videokit_run ( JNIEnv * env, jobject obj, jobjectArray args ) Here’s the C function, excluding usual JNI boilerplate (complete file is The JNI interface is really simple: a simple C wrapper calling FFmpeg’s Update from March 27th 2016: for an up-to-date sample, see
Meant to be run once, then exited, I also needed to reinitialize some static Replaced av_log() calls to use Android’s LogCat. I used some FFmpeg’s executable source files ( ffmpeg.c, containing main(),Īnd directly related ones), and tweaked them: removed every exit() call and Idea: adapt FFmpeg’s main() to a simple function, and write a JNI
That’s it! FFmpeg is ready to use! Using FFmpeg Include $(PREBUILT_STATIC_LIBRARY ) include $(CLEAR_VARS ) LOCAL_MODULE := libswresample
Include $(PREBUILT_STATIC_LIBRARY ) include $(CLEAR_VARS ) LOCAL_MODULE := libavfilter Include $(PREBUILT_STATIC_LIBRARY ) include $(CLEAR_VARS ) LOCAL_MODULE := libavutil Include $(PREBUILT_STATIC_LIBRARY ) include $(CLEAR_VARS ) LOCAL_MODULE := libswscale Include $(PREBUILT_STATIC_LIBRARY ) include $(CLEAR_VARS ) LOCAL_MODULE := libavformat Include $(PREBUILT_STATIC_LIBRARY ) include $(CLEAR_VARS ) LOCAL_MODULE := libavcodec LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH )/include LOCAL_PATH := $(call my-dir ) include $(CLEAR_VARS ) LOCAL_MODULE := libavdevice Setting environment variables for Android SDK/NDK On Archlinux, using android-sdk and android-ndk AUR packages: Set two environment variables ( ANDROID_SDK and ANDROID_NDK) to their Prerequisitesįirst, let’s install everything needed. Standard shell and should work on any decent OS. I’ll describe the steps for Linux, but everything is pretty Of questions on StackOverflow about getting newerįFmpeg releases working on Android. I needed to use FFmpeg concat demuxer, introduced in FFmpeg 1.1. There are a lot of partial and/or out-of-date how-to out there on how to get However,įFmpeg is a C software, meant to be used as an executable, and not officially Software, you have a single name which comes directly to you: FFmpeg. When you have to manipulate audio or video on Android, being used to open-source
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