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我正在嘗試在Android上使用FFMpeg。首先,我試圖在我的Mac上構建FFMpeg,但我無法做到這一點。我在互聯網上查了很多解決方案,但沒有工作由此我嘗試在Ubuntu 12.04上構建FFMpeg。我嘗試了很多解決方案,最後我發現了this示例,並且我成功構建了它。然後我得到頭文件和.so文件。然後我將它們全部複製到我的Mac上,並嘗試在我的項目中使用它。我將這些文件複製到我的項目中。現在我的項目樹是這個樣子:如何鏈接Android上的.so庫
這裏是我的Android.mk文件:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := avformat
LOCAL_SRC_FILES := libavformat.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include/libavformat
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := ndksetup
LOCAL_SRC_FILES := native.c
LOCAL_LDLIBS := -llog
LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
include $(BUILD_SHARED_LIBRARY)
這裏是我的Application.mk文件:
APP_MODULES := ndksetup
APP_PLATFORM := android-8
LOCAL_SRC_FILES := $(TARGET_ARCH_ABI)/libavformat.so
這裏是我的natice.c文件:
#include <jni.h>
#include <string.h>
#include <android/log.h>
#include "include/libavcodec/avcodec.h"
#include "include/libavformat/avformat.h"
#define DEBUG_TAG "NDKSetupActivity"
void Java_com_example_ndksetup_MainActivity_printLog(JNIEnv *env, jobject this,
jstring logString) {
av_register_all();
jboolean isCopy;
const char * szLogString = (*env)->GetStringUTFChars(env, logString,
&isCopy);
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK: %s", szLogString);
(*env)->ReleaseStringUTFChars(env, logString, szLogString);
}
jint Java_com_example_ndksetup_MainActivity_fibonacci(JNIEnv * env,
jobject this, jint value) {
if (value <= 1)
return value;
return Java_com_example_ndksetup_MainActivity_fibonacci(env, this,
value - 1)
+ Java_com_example_ndksetup_MainActivity_fibonacci(env, this,
value - 2);
}
我得到錯誤
[armeabi] SharedLibrary : libndksetup.so
/Applications/adt-bundle-mac-x86_64-20140321/sdk/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: /Users/michal/Desktop/NDKSetup/obj/local/armeabi/objs/ndksetup/native.o: in function Java_com_example_ndksetup_MainActivity_printLog:/Users/michal/Desktop/NDKSetup/jni/native.c:11: error: undefined reference to 'av_register_all'
collect2: ld returned 1 exit status
make: *** [/Users/michal/Desktop/NDKSetup/obj/local/armeabi/libndksetup.so] Error 1
而且我真的不知道該如何處理它。你能告訴我什麼我做錯了,我該如何解決它?或者,也許有另一種方式來使用.so庫Android在Android