[英]How to build ffmpeg in android app?
After successfully build ffmpeg by bellow steps 通过下面的步骤成功构建ffmpeg之后
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:- 但我的项目给出了错误: -
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. 请有人帮助我。
You must link with the android library too, so add -landroid to your LOCAL_LDLIBS. 你也必须链接到android库,所以将-landroid添加到你的LOCAL_LDLIBS。
The document STABLE-APIS.html under $NDK/docs explains: $ NDK / docs下的文件STABLE-APIS.html解释:
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
所有相应的函数都由API级别9附带的“libandroid.so”库版本提供。要使用它,请使用以下命令:LOCAL_LDLIBS + = -landroid
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