How to build ffmpeg in android app?
android, android-ndk, ffmpeg
Solution
You must link with the android library too, so add -landroid to your LOCAL_LDLIBS.
The document STABLE-APIS.html under $NDK/docs explains:
All the corresponding functions are provided by the "libandroid.so" library version that comes with API level 9. To use it, use the following: LOCAL_LDLIBS += -landroid
Problem
After successfully build ffmpeg by bellow steps ``` http://stackoverflow.com/questions/22471514/ffmpeg-build-output-is-not-showing Now I have copy include and all .a file into my JNI folder. and my Android.mk file is as:- LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := ffmpegutils LOCAL_SRC_FILES := tutorial02.c LOCAL_C_INCLUDES := $(LOCAL_PATH)/include LOCAL_LDLIBS := -L$(NDK_PLATFORMS_ROOT)/$(TARGET_PLATFORM)/arch-arm/usr/lib -L$(LOCAL_PATH) -lavformat -lavcodec -lavfilter -lavutil -lswscale -llog -ljnigraphics -lz -ldl -lgcc include $(BUILD_SHARED_LIBRARY) ``` but my project giving error as:- ``` Description Resource Path Location Type make: *** [obj/local/armeabi/libffmpegutils.so] Error 1 MainActivity C/C++ Problem undefined reference to 'ANativeWindow_unlockAndPost' MainActivity line 231, external location: /home/kiwitech/Documents/development/tools/ndk/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/ffmpegutils/tutorial02.o: in function decodeAndRender:jni/tutorial02.c C/C++ Problem undefined reference to 'ANativeWindow_lock' MainActivity line 222, external location: /home/kiwitech/Documents/development/tools/ndk/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/ffmpegutils/tutorial02.o: in function decodeAndRender:jni/tutorial02.c C/C++ Problem undefined reference to 'ANativeWindow_release' MainActivity line 150, external location: /home/kiwitech/Documents/development/tools/ndk/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/ffmpegutils/tutorial02.o: in function naSetSurface:jni/tutorial02.c C/C++ Problem undefined reference to 'ANativeWindow_setBuffersGeometry' MainActivity line 147, external location: /home/kiwitech/Documents/development/tools/ndk/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/ffmpegutils/tutorial02.o: in function naSetSurface:jni/tutorial02.c C/C++ Problem undefined reference to 'ANativeWindow_fromSurface' MainActivity line 145, external location: /home/kiwitech/Documents/development/tools/ndk/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/ffmpegutils/tutorial02.o: in function naSetSurface:jni/tutorial02.c C/C++ Problem ``` please anyone help me.