Android Studio2.2.3 Reference FFmpeg Library summary via JNI

To modify a step:

1. First compile the libffmpeg.so with NDK14 and take out the Include directory

2. Create a JNI-based project with AS, put the include directory under the CPP, build the Jnilibs/armeabi directory, and put the libffmpeg.so inside

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3. Configure CMakeLists.txt

Add the following:

#add the FFmpeg Lib
Include_directories (${cmake_current_source_dir}/src/main/cpp/include)
Add_library (ffmpeg-lib SHARED imported)
Set_target_properties (Ffmpeg-lib Properties Imported_location ${cmake_current_source_dir}/src/main/jnilibs/ armeabi/libffmpeg.so)

targ Et_link_libraries ( native-lib 
                         ffmpeg-lib               #ffmpeg  lib 
                         android                  #use  the  Android log lib 
                         ${log-lib} )  
 

4. Configure Build.gradle

Major additions to arguments and NDK configurations

Externalnativebuild {cmake {cppflags "" arguments '-dandroid_toolchain=clang ', '-dandroid_stl=gnustl_st Atic '} ndk {abifilters ' Armeabi '}}

5.native_lib.cpp

#include <jni.h>
#include <string>
#include <android/log.h>

extern "C"
{
#include "libavcodec/avcodec.h"
#include "Libavformat/avformat.h"
#include "libswscale/swscale.h"
#include "Libavutil/imgutils.h"
#include "libavutil/avutil.h"

}

#define LOG_TAG "Mytagffmpeg"
#define ALOGE (...) __android_log_print (Android_log_debug, Log_tag, __va_args__)

extern "C"
Jstring
Java_letv_com_myffmpeg_mainactivityffmpeg_stringfromjni (
JNIEnv *env,
Jobject/* This */) {
std::string Hello = "Hello, this is the first ffmpeg test!";

Aloge ("%s", Hello.c_str ());
Char info[10000] = {0};
sprintf (Info, "%s\n", Avcodec_configuration ());
Hello + = info;

Return Env->newstringutf (Hello.c_str ());
}

That's all.

This article is from the "focus on embedded multimedia Technology" blog, please be sure to keep this source http://zyg0227.blog.51cto.com/1043164/1947097

Android Studio2.2.3 Reference FFmpeg Library summary via JNI