报错信息:

../../../../src/main/cpp/native-lib.cpp:9: error: undefined reference to 'avcodec_configuration()'
 

我的 native-lib.cpp 为:

#include <jni.h>
#include <string>
#include "libavcodec/avcodec.h"

extern "C" JNIEXPORT jstring JNICALL
Java_com_example_vtion_ffmpegwufour_MainActivity_stringFromJNI(
        JNIEnv *env,
        jobject /* this */) {
    std::string hello = avcodec_configuration();
    return env->NewStringUTF(hello.c_str());
}

 

应添加 :

extern "C" {

}

添加完毕的代码为:

#include <jni.h>
#include <string>

extern "C" {
#include "libavcodec/avcodec.h"

extern "C" JNIEXPORT jstring JNICALL
Java_com_example_vtion_ffmpegwufour_MainActivity_stringFromJNI(
        JNIEnv *env,
        jobject /* this */) {
    std::string hello = avcodec_configuration();
    return env->NewStringUTF(hello.c_str());
}
}