android实现视频压缩上传 安卓开发视频压缩

 

预热

---

时光荏苒，光阴如梭，离上一次吹牛逼已经过去了两三个月，身边很多人的女票已经分了又合，合了又分，本屌依旧骄傲单身。上一次啊我们大致说了一些简单的FFmpeg命令以及Java层简单的调用方式，然后有很多朋友在github或者csdn上给我留言，很多时候我都选择避而不答，原因是本库以前用的so包是不开源的，我根本改不了里面东西。但是这一次啊我们玩点大的，我重新编译了FFmpeg且重写JNI的接口函数，这次将从C到Java全面开源，2.0项目花了本尊两个多月的业余时间，今天终于完工，非常鸡冻，且本博客将抒发出作者的全部心声，有没有很鸡冻，有没有。鸡冻之余，我也想吐槽下其软便的效率，确实不是很高，3.0的时候将会试试硬编码,或则在2.0迭代的时候会采用H265编码，这都是后话了，不过看微信把小视频换成大视频的节奏，应该可以搞。

本文涉及知识点:

• Andorid 视频和音频采集
• YUV视频处理(手动剪切、旋转、镜像等)PCM音频处理
• 利用FFmpeg API ，YUV编码为H264、PCM编码为AAC
• FFmpeg 编码器的配置
• JNI在工程中的实际运用
• Android下FFmpeg命令工具的制作与应用
• Android Studio插件 cMake 在工程中的应用

充能:

• 至少需要知道YUV、PCM、MP4是什么（视音频编解码技术零基础学习方法）。
• 最好能先阅读编译Android下可用的FFmpeg(包含libx264与libfdk-aac)、编译Android下可执行命令的FFmpeg、Android下玩JNI的新老三种姿势，为了不太啰嗦，这些文章中分享过的大多数知识将不再重复。
• 对C/C++基本语法有基本的了解。

本人环境与工具

• 系统: macOS-10.12.5
• 编译器: Android Studio-2.3.2
• ndk: r14
• FFmpeg: 3.2.5

项目概括:

1. 效果图:

项目地址没变:https://github.com/mabeijianxi/small-video-record这里复用了1.0版本的gif图，因为界面一点没变，功能的话暂时没封装那么多，没关系后期会补上。

2. 整体流程:

3. 工程目录浏览:

新建项目

---

我们新建一个项目，也许与以往不同，需要勾选上 C++ 支持与 C++ standard选项时选择 C++ 11,如下图：

C++支持是必须的，至于选用C++ 11也是有原因的,后面我们会用的里面的一些API。
然后我们把在编译Android下可用的FFmpeg(包含libx264与libfdk-aac)中编译好的六个动态库、头文件还有 cmdutils.c cmdutils.h cmdutils_common_opts.h config.h ffmpeg.c ffmpeg.h ffmpeg_filter.c ffmpeg_opt.c copy到我们工程的cpp目录下，完成后你cpp目录应该如下

也许你会比我多一个自动生成的native-lib.cpp,这个文件暂时保留它。

编写JNI接口：

我新建了一个接口类FFmpegBridge.java，且根据我的需求暂时定义了如下方法:

package com.mabeijianxi.smallvideorecord2.jniinterface;

import java.util.ArrayList;

/**
 * Created by jianxi on 2017/5/12.
 * https://github.com/mabeijianxi
 * [e-mail]
 */

public class FFmpegBridge {
    private static ArrayList<FFmpegStateListener> listeners=new ArrayList();
    static {
        System.loadLibrary("avutil");
        System.loadLibrary("swresample");
        System.loadLibrary("avcodec");
        System.loadLibrary("avformat");
        System.loadLibrary("swscale");
        System.loadLibrary("avfilter");
        System.loadLibrary("jx_ffmpeg_jni");

    }

    /**
     * 结束录制并且转码保存完成
     */
    public static final int ALL_RECORD_END =1;


    public final static int ROTATE_0_CROP_LF=0;
    /**
     * 旋转90度剪裁左上
     */
    public final static int ROTATE_90_CROP_LT =1;
    /**
     * 暂时没处理
     */
    public final static int ROTATE_180=2;
    /**
     * 旋转270(-90)裁剪左上，左右镜像
     */
    public final static int ROTATE_270_CROP_LT_MIRROR_LR=3;


    /**
     *
     * @return 返回ffmpeg的编译信息
     */
    public static native String getFFmpegConfig();

    /**
     *  命令形式运行ffmpeg
     * @param cmd
     * @return 返回0表示成功
     */
    private static native int jxCMDRun(String cmd[]);

    /**
     * 编码一帧视频，暂时只能编码yv12视频
     * @param data
     * @return
     */
    public static native int encodeFrame2H264(byte[] data);


    /**
     * 编码一帧音频,暂时只能编码pcm音频
     * @param data
     * @return
     */
    public static native int encodeFrame2AAC(byte[] data);

    /**
     *  录制结束
     * @return
     */
    public static native int recordEnd();

    /**
     * 初始化
     * @param debug
     * @param logUrl
     */
    public static native void initJXFFmpeg(boolean debug,String logUrl);


    public static native void nativeRelease();

    /**
     *
     * @param mediaBasePath 视频存放目录
     * @param mediaName 视频名称
     * @param filter 旋转镜像剪切处理
     * @param in_width 输入视频宽度
     * @param in_height 输入视频高度
     * @param out_height 输出视频高度
     * @param out_width 输出视频宽度
     * @param frameRate 视频帧率
     * @param bit_rate 视频比特率
     * @return
     */
    public static native int prepareJXFFmpegEncoder(String mediaBasePath, String mediaName, int filter,int in_width, int in_height, int out_width, int  out_height, int frameRate, long bit_rate);


    /**
     * 命令形式执行
     * @param cmd
     */
    public static int jxFFmpegCMDRun(String cmd){
        String regulation="[ \\t]+";
        final String[] split = cmd.split(regulation);

       return jxCMDRun(split);
    }

    /**
     * 底层回调
     * @param state
     * @param what
     */
    public static synchronized void notifyState(int state,float what){
        for(FFmpegStateListener listener: listeners){
            if(listener!=null){
                if(state== ALL_RECORD_END){
                    listener.allRecordEnd();
                }
            }
        }
    }

    /**
     *注册录制回调
     * @param listener
     */
    public static void registFFmpegStateListener(FFmpegStateListener listener){

        if(!listeners.contains(listener)){
            listeners.add(listener);
        }
    }
    public static void unRegistFFmpegStateListener(FFmpegStateListener listener){
        if(listeners.contains(listener)){
            listeners.remove(listener);
        }
    }
    public interface FFmpegStateListener {
        void allRecordEnd();
    }
}

你新建这些方法的时候由于native没有定义,这时候它们都会爆红，不要担心不要纠结，光标放到对应的方法上，轻轻按下Atl + Enter你就会出现如图的效果了：

再次确定之后这个接口就会在native添加。我不太喜欢叫native-lib.cpp,于是我改成了jx_ffmpeg_jni.cpp，其内容暂时如下:

/**
 * Created by jianxi on 2017/5/12.
 * https://github.com/mabeijianxi
 * [e-mail]
 */
#include <jni.h>
#include <string>
using namespace std;

/**
 * 编码准备，写入配置信息
 */
extern "C"
JNIEXPORT jint JNICALL
Java_com_mabeijianxi_smallvideorecord2_jniinterface_FFmpegBridge_prepareJXFFmpegEncoder(JNIEnv *env,
                                                                                        jclass type,
                                                                                        jstring media_base_path_,
                                                                                        jstring media_name_,
                                                                                        jint v_custom_format,
                                                                                        jint in_width,
                                                                                        jint in_height,
                                                                                        jint out_width,
                                                                                        jint out_height,
                                                                                        jint frame_rate,
                                                                                        jlong video_bit_rate) {




}
/**
 * 编码一帧视频
 */
extern "C"
JNIEXPORT jint JNICALL
Java_com_mabeijianxi_smallvideorecord2_jniinterface_FFmpegBridge_encodeFrame2H264(JNIEnv *env,
                                                                                  jclass type,
                                                                                  jbyteArray data_) {


    return 0;
}

/**
 * 获取ffmpeg编译信息
 */
extern "C"
JNIEXPORT jstring JNICALL
Java_com_mabeijianxi_smallvideorecord2_jniinterface_FFmpegBridge_getFFmpegConfig(JNIEnv *env,
                                                                                 jclass type) {

    return NULL;
}

/**
 * 编码一帧音频
 */
extern "C"
JNIEXPORT jint JNICALL
Java_com_mabeijianxi_smallvideorecord2_jniinterface_FFmpegBridge_encodeFrame2AAC(JNIEnv *env,
                                                                                 jclass type,
                                                                                 jbyteArray data_) {
    return 0;
}

/**
 *结束
 */
extern "C"
JNIEXPORT jint JNICALL
Java_com_mabeijianxi_smallvideorecord2_jniinterface_FFmpegBridge_recordEnd(JNIEnv *env,
                                                                           jclass type) {
    return 0;
}

JNIEXPORT void JNICALL
Java_com_mabeijianxi_smallvideorecord2_jniinterface_FFmpegBridge_nativeRelease(JNIEnv *env,
                                                                               jclass type) {

    // TODO
}

编写native代码

---

我用c/c++用的不多，Java又用习惯了，所以在命名上有时候很纠结，看不惯亲的怎么办？那就些许的忍一忍吧~~

1. 准备log函数:

不管玩什么语言，没日志玩毛线啊，所以这是第一步。新建jx_log.cpp与jx_log.h。
jx_log.h:

/**
 * Created by jianxi on 2017/6/2.
 * https://github.com/mabeijianxi
 * [e-mail]
 */
#ifndef JIANXIFFMPEG_JX_LOG_H
#define JIANXIFFMPEG_JX_LOG_H

#include <android/log.h>

extern int JNI_DEBUG;

#define LOGE(debug, format, ...) if(debug){__android_log_print(ANDROID_LOG_ERROR, "jianxi_ffmpeg", format, ##__VA_ARGS__);}
#define LOGI(debug, format, ...) if(debug){__android_log_print(ANDROID_LOG_INFO, "jianxi_ffmpeg", format, ##__VA_ARGS__);}

#endif //JIANXIFFMPEG_JX_LOG_H

jx_log.cpp:

/**
 * Created by jianxi on 2017/6/2.
 * https://github.com/mabeijianxi
 * [e-mail]
 */
#include "jx_log.h"

int JNI_DEBUG= 1;

当然我们也定义了一个是否开启debug的标志 JNI_DEBUG。

2.准备好可执行命令的FFmpeg接口:

这里假设你已经看完了编译Android下可执行命令的FFmpeg，因为我们要对之前copy进来的源码做些修改，不然没法用的。我们新建两个文件来对接FFmpeg,文件中一个函数给Java层调用，一个给Native调用,还有一个是初始化debug控制日志用的，可以先不管。

jx_ffmpeg_cmd_run.h：

/**
 * Created by jianxi on 2017/6/4.
 * https://github.com/mabeijianxi
 * [e-mail]
 */
#ifndef JIANXIFFMPEG_FFMPEG_RUN_H
#define JIANXIFFMPEG_FFMPEG_RUN_H

#include <jni.h>

JNIEXPORT jint JNICALL
Java_com_mabeijianxi_smallvideorecord2_jniinterface_FFmpegBridge_jxCMDRun(JNIEnv *env, jclass type,
                                                                       jobjectArray commands);

void log_callback(void* ptr, int level, const char* fmt,
                            va_list vl);

JNIEXPORT void JNICALL
Java_com_mabeijianxi_smallvideorecord2_jniinterface_FFmpegBridge_initJXFFmpeg(JNIEnv *env, jclass type,
        jboolean debug,
jstring logUrl_);

int ffmpeg_cmd_run(int argc, char **argv);
#endif //JIANXIFFMPEG_FFMPEG_RUN_H

jx_ffmpeg_cmd_run.c:

/**
 * Created by jianxi on 2017/6/4..
 * https://github.com/mabeijianxi
 * [e-mail]
 */
#include "jx_ffmpeg_cmd_run.h"
#include "ffmpeg.h"
#include "jx_log.h"

/**
 * 以命令行方式运行，返回0表示成功
 */
JNIEXPORT jint JNICALL
Java_com_mabeijianxi_smallvideorecord2_jniinterface_FFmpegBridge_jxCMDRun(JNIEnv *env, jclass type,
        jobjectArray commands){
    int argc = (*env)->GetArrayLength(env,commands);
    char *argv[argc];
    int i;
    for (i = 0; i < argc; i++) {
        jstring js = (jstring) (*env)->GetObjectArrayElement(env,commands, i);
        argv[i] = (char *) (*env)->GetStringUTFChars(env,js, 0);
    }
    return ffmpeg_cmd_run(argc,argv);
}

int ffmpeg_cmd_run(int argc, char **argv){
    return jxRun(argc, argv);

}

char *logUrl;

/**
 * 初始化debug工具
 */
JNIEXPORT void JNICALL
Java_com_mabeijianxi_smallvideorecord2_jniinterface_FFmpegBridge_initJXFFmpeg(JNIEnv *env, jclass type,
                                                                           jboolean debug,
                                                                           jstring logUrl_) {
    JNI_DEBUG = debug;
    if (JNI_DEBUG&&logUrl_!=NULL) {
        av_log_set_callback(log_callback);
        const char* log = (*env)->GetStringUTFChars(env,logUrl_, 0);
        logUrl = (char*)malloc(strlen(log));
        strcpy(logUrl,log);
        (*env)->ReleaseStringUTFChars(env,logUrl_, log);
    }

}


void log_callback(void *ptr, int level, const char *fmt,
                  va_list vl) {
    FILE *fp = NULL;

    if (!fp)
        fp = fopen(logUrl, "a+");
    if (fp) {
        vfprintf(fp, fmt, vl);
        fflush(fp);
        fclose(fp);
    }

}

一口气写到这里，必定会四处爆红，惨不忍睹，各种找不到文件，找不到方法，那是因为你添加了这么多文件，cMake工具不知道，正确的做法是每添加一个C/C++文件然后就去 CMakeLists.txt 里面告诉人家一声，完了还别忘了点击 Sync 同步下子。

3. CMakeLists.txt编写:

先强上一个脚本:

# For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html

# Sets the minimum version of CMake required to build the native library.

cmake_minimum_required(VERSION 3.4.1)

# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.

add_library( # Sets the name of the library.
             jx_ffmpeg_jni

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
              src/main/cpp/jx_yuv_encode_h264.cpp
              src/main/cpp/jx_pcm_encode_aac.cpp
              src/main/cpp/jx_media_muxer.cpp
              src/main/cpp/jx_jni_handler.cpp
              src/main/cpp/jx_ffmpeg_jni.cpp
              src/main/cpp/threadsafe_queue.cpp
              src/main/cpp/jx_log.cpp
              src/main/cpp/cmdutils.c
              src/main/cpp/ffmpeg.c
              src/main/cpp/ffmpeg_filter.c
              src/main/cpp/ffmpeg_opt.c
              src/main/cpp/jx_ffmpeg_cmd_run.c
              src/main/cpp/jx_ffmpeg_config.cpp
             )
add_library(
            avcodec
            SHARED
            IMPORTED
            )
set_target_properties(
    avcodec
    PROPERTIES IMPORTED_LOCATION
    ${CMAKE_SOURCE_DIR}/src/main/cpp/libavcodec.so
    )
add_library(
            avfilter
            SHARED
            IMPORTED
             )
set_target_properties(
        avfilter
        PROPERTIES IMPORTED_LOCATION
        ${CMAKE_SOURCE_DIR}/src/main/cpp/libavfilter.so
        )

add_library(
            avformat
            SHARED
            IMPORTED
            )
set_target_properties(
            avformat
            PROPERTIES IMPORTED_LOCATION
            ${CMAKE_SOURCE_DIR}/src/main/cpp/libavformat.so
            )

add_library(
            avutil
            SHARED
            IMPORTED
            )
set_target_properties(
            avutil
            PROPERTIES IMPORTED_LOCATION
            ${CMAKE_SOURCE_DIR}/src/main/cpp/libavutil.so
            )
add_library(
            swresample
            SHARED
            IMPORTED
            )
set_target_properties(
            swresample
            PROPERTIES IMPORTED_LOCATION
            ${CMAKE_SOURCE_DIR}/src/main/cpp/libswresample.so
             )
add_library(
            swscale
            SHARED
            IMPORTED
            )
set_target_properties(
            swscale
            PROPERTIES IMPORTED_LOCATION
            ${CMAKE_SOURCE_DIR}/src/main/cpp/libswscale.so
             )
add_library(
            jxffmpegcmd
            SHARED
            IMPORTED
            )
set_target_properties(
            jxffmpegcmd
            PROPERTIES IMPORTED_LOCATION
            ${CMAKE_SOURCE_DIR}/src/main/cpp/libjxffmpegrun.so
             )

include_directories(
    ${CMAKE_SOURCE_DIR}/ffmpeg-3.2.5/

)
# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.

find_library( # Sets the name of the path variable.
              log-lib

              # Specifies the name of the NDK library that
              # you want CMake to locate.
              log )

# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in this
# build script, prebuilt third-party libraries, or system libraries.

target_link_libraries( # Specifies the target library.
                       jx_ffmpeg_jni
                       avcodec
                       avfilter
                       avformat
                       avutil
                       swresample
                       swscale
                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} )

当然这个脚本是整个完整工程的，有些文件我们到后面才会建出来，现在就忍耐一下，如果你不想被爆红那么就需要每添加一个文件然后就在第一个 add_library 里面也添加一下，再点击Android Studio的同步按钮。 里面其他 library 都是我们事先编译好copy进来的，所以采用预构建的方式添加，这里都是相对路径，所以你不需要修改什么。
include_directories 里面写上你已经编译过的源码的路径，很关键。这里面的头文件才是全的~。

4. 准备一个安全的队列:

我们在采集音视频数据后会发送给FFmpeg做一系列的处理，由于是软编码所以编码快慢和CPU有很大的关系，就现在的x264的算法结合当今的CPU是跟不上咋们采集每秒20帧+的速度的，直接采集一帧就编码一帧的话肯定会丢帧的，所以我决定把它放入一个队里里面，由于存在多线程编程，我们的队列需要 safety,就跟几个男的抢一个妹子一样，妹子自然需要我这样的人保护她咯。这个队列的代码是我网上copy的，没啥说的~~

threadsafe_queue.cpp

/**
 * Created by jianxi on 2017/5/31.
 * https://github.com/mabeijianxi
 * [e-mail]
 */
#ifndef JIANXIFFMPEG_THREADSAFE_QUEUE_CPP
#define JIANXIFFMPEG_THREADSAFE_QUEUE_CPP


#include <queue>
#include <memory>
#include <mutex>
#include <condition_variable>
/**
 * 一个安全的队列
 */
template<typename T>
class threadsafe_queue {
private:
    mutable std::mutex mut;
    std::queue<T> data_queue;
    std::condition_variable data_cond;
public:
    threadsafe_queue() {}

    threadsafe_queue(threadsafe_queue const &other) {
        std::lock_guard<std::mutex> lk(other.mut);
        data_queue = other.data_queue;
    }

    void push(T new_value)//入队操作
    {
        std::lock_guard<std::mutex> lk(mut);
        data_queue.push(new_value);
        data_cond.notify_one();
    }

    void wait_and_pop(T &value)//直到有元素可以删除为止
    {
        std::unique_lock<std::mutex> lk(mut);
        data_cond.wait(lk, [this] { return !data_queue.empty(); });
        value = data_queue.front();
        data_queue.pop();
    }

    std::shared_ptr<T> wait_and_pop() {
        std::unique_lock<std::mutex> lk(mut);
        data_cond.wait(lk, [this] { return !data_queue.empty(); });
        std::shared_ptr<T> res(std::make_shared<T>(data_queue.front()));
        data_queue.pop();
        return res;
    }

    bool try_pop(T &value)//不管有没有队首元素直接返回
    {
        std::lock_guard<std::mutex> lk(mut);
        if (data_queue.empty())
            return false;
        value = data_queue.front();
        data_queue.pop();
        return true;
    }

    std::shared_ptr<T> try_pop() {
        std::lock_guard<std::mutex> lk(mut);
        if (data_queue.empty())
            return std::shared_ptr<T>();
        std::shared_ptr<T> res(std::make_shared<T>(data_queue.front()));
        data_queue.pop();
        return res;
    }

    bool empty() const {
        return data_queue.empty();
    }
};

#endif //JIANXIFFMPEG_THREADSAFE_QUEUE_CPP

这里面用的几个 lib 就是 C++ 11标准里面的啦~

5. 准备一个储存配置信息的结构体:

其实这玩意和JavaBean差不多嘛，直接搞代码,代码中的JXJNIHandler
字段姑且当做没看到。

jx_user_arguments.h:

/**
 * Created by jianxi on 2017/5/26.
 * https://github.com/mabeijianxi
 * [e-mail]
 */
#ifndef JIANXIFFMPEG_JX_USER_ARGUMENTS_H
#define JIANXIFFMPEG_JX_USER_ARGUMENTS_H


#include "jni.h"
class JXJNIHandler;
typedef struct UserArguments {
    const char *media_base_path; //文件储存地址
    const char *media_name; // 文件命令前缀
    char *video_path; //视频储存地址
    char *audio_path; //音频储存地址
    char *media_path; //合成后的MP4储存地址
    int in_width; //输出宽度
    int in_height; //输入高度
    int out_height; //输出高度
    int out_width; //输出宽度
    int frame_rate; //视频帧率控制
    long long video_bit_rate; //视频比特率控制
    int audio_bit_rate; //音频比特率控制
    int audio_sample_rate; //音频采样率控制（44100）
    int v_custom_format; //一些滤镜操作控制
    JNIEnv *env; //env全局指针
    JavaVM *javaVM; //jvm指针
    jclass java_class; //java接口类的calss对象
    JXJNIHandler *handler; // 一个全局处理对象的指针
} ;
#endif //JIANXIFFMPEG_JX_USER_ARGUMENTS_H

这个结构体在整个过程中都会用到。

6. 编写一个base.h

其实啊，当时写这个头文件是不想老去include同样的东西，我们视频编码与音频编码都需要要include的头文件放在了这里，并且定义了一些规则性的宏。

base_include.h:

/**
 * Created by jianxi on 2017/5/18.
 * https://github.com/mabeijianxi
 * [e-mail]
 */

#ifndef JIANXIFFMPEG_BASE_INCLUDE_H
#define JIANXIFFMPEG_BASE_INCLUDE_H

extern "C"
{
#include "include/libavcodec/avcodec.h"
#include "include/libavformat/avformat.h"
#include "include/libavcodec/avcodec.h"
#include "include/libavutil/opt.h"
}

#include "threadsafe_queue.cpp"
#include <jni.h>
#include <string>

#define END_STATE 1
#define START_STATE 0


#define ROTATE_0_CROP_LT 0

/**
 * 旋转90度剪裁左上
 */
#define ROTATE_90_CROP_LT 1
/**
 * 暂时没处理
 */
#define ROTATE_180 2
/**
 * 旋转270(-90)裁剪左上，左右镜像
 */
#define ROTATE_270_CROP_LT_MIRROR_LR 3

using namespace std;


#endif //JIANXIFFMPEG_BASE_INCLUDE_H

FFmpeg源码C的，include时 extern "C"很关键

7. 编写视频(YUV)编码代码

这小节是本文的核心之一，简化后的思路是这样的:

有的兄弟可能会问为什么不编码一帧合成一帧，因为啊我测试了下合成时间，基本都是毫秒级别的，还有就是嫌麻烦，我这样做的话直接用我们制作的FFmpeg命令工具然后几行代码就搞定了，先上代码。

jx_yuv_encode_h264.h:

/**
 * Created by jianxi on 2017/5/12.
 * https://github.com/mabeijianxi
 * [e-mail]
 */
#ifndef JIANXIFFMPEG_JX_YUV_ENCODE_H264_H
#define JIANXIFFMPEG_JX_YUV_ENCODE_H264_H



#include "base_include.h"

#include "jx_user_arguments.h"

using namespace std;
/**
 * yuv编码h264
 */
class JXYUVEncodeH264 {
public:
    JXYUVEncodeH264(UserArguments* arg);
public:
    int initVideoEncoder();

    static void* startEncode(void * obj);

    int startSendOneFrame(uint8_t *buf);

    void user_end();

    int encodeEnd();

    void custom_filter(const JXYUVEncodeH264 *h264_encoder, const uint8_t *picture_buf,
                       int in_y_size,
                       int format);
private:
    int flush_encoder(AVFormatContext *fmt_ctx, unsigned int stream_index);

private:
    UserArguments *arguments;
    int is_end = 0;
    threadsafe_queue<uint8_t *> frame_queue;
    AVFormatContext *pFormatCtx;
    AVOutputFormat *fmt;
    AVStream *video_st;
    AVCodecContext *pCodecCtx;
    AVCodec *pCodec;
    AVPacket pkt;
    AVFrame *pFrame;
    int picture_size;
    int out_y_size;
    int framecnt = 0;
    int frame_count = 0;
    ~JXYUVEncodeH264() {
    }

};

#endif //JIANXIFFMPEG_JX_YUV_ENCODE_H264_H

jx_yuv_encode_h264.cpp:

/**
 * Created by jianxi on 2017/5/12.
 * https://github.com/mabeijianxi
 * [e-mail]
 */
#include "jx_yuv_encode_h264.h"
#include "jx_jni_handler.h"
#include "jx_log.h"
#include <pthread.h>

JXYUVEncodeH264::JXYUVEncodeH264(UserArguments *arg) : arguments(arg) {

}

/**
 * 结束编码时刷出还在编码器里面的帧
 * @param fmt_ctx
 * @param stream_index
 * @return
 */
int JXYUVEncodeH264::flush_encoder(AVFormatContext *fmt_ctx, unsigned int stream_index) {
    int ret;
    int got_frame;
    AVPacket enc_pkt;
    if (!(fmt_ctx->streams[stream_index]->codec->codec->capabilities &
          CODEC_CAP_DELAY))
        return 0;
    while (1) {
        enc_pkt.data = NULL;
        enc_pkt.size = 0;
        av_init_packet(&enc_pkt);
        ret = avcodec_encode_video2(fmt_ctx->streams[stream_index]->codec, &enc_pkt,
                                    NULL, &got_frame);
        av_frame_free(NULL);
        if (ret < 0)
            break;
        if (!got_frame) {
            ret = 0;
            break;
        }
        LOGI(JNI_DEBUG, "_Flush Encoder: Succeed to encode 1 frame video!\tsize:%5d\n",
             enc_pkt.size);
        /* mux encoded frame */
        ret = av_write_frame(fmt_ctx, &enc_pkt);
        if (ret < 0)
            break;
    }

    return ret;
}

/**
 * 初始化视频编码器
 * @return
 */
int JXYUVEncodeH264::initVideoEncoder() {
    LOGI(JNI_DEBUG, "视频编码器初始化开始")

    size_t path_length = strlen(arguments->video_path);
    char *out_file = (char *) malloc(path_length + 1);
    strcpy(out_file, arguments->video_path);

    av_register_all();
    //Method1.
//    pFormatCtx = avformat_alloc_context();
//    //Guess Format
//    fmt = av_guess_format(NULL, out_file, NULL);
//
//    LOGE(JNI_DEBUG,",fmt==null?:%s", fmt == NULL ? "null" : "no_null");
//    pFormatCtx->oformat = fmt;
    //Method 2.
    avformat_alloc_output_context2(&pFormatCtx, NULL, NULL, out_file);
    fmt = pFormatCtx->oformat;


    //Open output URL
    if (avio_open(&pFormatCtx->pb, out_file, AVIO_FLAG_READ_WRITE) < 0) {
        LOGE(JNI_DEBUG, "_Failed to open output file! \n");
        return -1;
    }

    video_st = avformat_new_stream(pFormatCtx, 0);
    //video_st->time_base.num = 1;
    //video_st->time_base.den = 25;

    if (video_st == NULL) {
        LOGE(JNI_DEBUG, "_video_st==null");
        return -1;
    }

    //Param that must set
    pCodecCtx = video_st->codec;
    //pCodecCtx->codec_id =AV_CODEC_ID_HEVC;
    pCodecCtx->codec_id = AV_CODEC_ID_H264;
    pCodecCtx->codec_type = AVMEDIA_TYPE_VIDEO;
    pCodecCtx->pix_fmt = AV_PIX_FMT_YUV420P;
    if (arguments->v_custom_format == ROTATE_0_CROP_LT || arguments->v_custom_format == ROTATE_180) {
        pCodecCtx->width = arguments->out_width;
        pCodecCtx->height = arguments->out_height;
    } else {
        pCodecCtx->width = arguments->out_height;
        pCodecCtx->height = arguments->out_width;
    }

    pCodecCtx->bit_rate = arguments->video_bit_rate;
    pCodecCtx->gop_size = 250;
    pCodecCtx->thread_count = 16;

    pCodecCtx->time_base.num = 1;
    pCodecCtx->time_base.den = arguments->frame_rate;
//    pCodecCtx->me_pre_cmp = 1;
    //H264
    //pCodecCtx->me_range = 16;
    //pCodecCtx->max_qdiff = 4;
    //pCodecCtx->qcompress = 0.6;
    pCodecCtx->qmin = 10;
    pCodecCtx->qmax = 51;

    //Optional Param
    pCodecCtx->max_b_frames = 3;

    // Set Option
    AVDictionary *param = 0;
    //H.264
    if (pCodecCtx->codec_id == AV_CODEC_ID_H264) {
        av_opt_set(pCodecCtx->priv_data, "preset", "superfast", 0);
//        av_dict_set(¶m, "tune", "animation", 0);
        av_dict_set(¶m, "profile", "baseline", 0);
    }

    //Show some Information
    av_dump_format(pFormatCtx, 0, out_file, 1);

    pCodec = avcodec_find_encoder(pCodecCtx->codec_id);
    if (!pCodec) {
        LOGE(JNI_DEBUG, "Can not find encoder! \n");
        return -1;
    }
    if (avcodec_open2(pCodecCtx, pCodec, ¶m) < 0) {
        LOGE(JNI_DEBUG, "Failed to open encoder! \n");
        return -1;
    }


    pFrame = av_frame_alloc();
    picture_size = avpicture_get_size(pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height);
    LOGI(JNI_DEBUG, "   picture_size:%d", picture_size);
    uint8_t *buf = (uint8_t *) av_malloc(picture_size);
    avpicture_fill((AVPicture *) pFrame, buf, pCodecCtx->pix_fmt, pCodecCtx->width,
                   pCodecCtx->height);

    //Write File Header
    avformat_write_header(pFormatCtx, NULL);
    av_new_packet(&pkt, picture_size);
    out_y_size = pCodecCtx->width * pCodecCtx->height;
    is_end = START_STATE;
    pthread_t thread;
    pthread_create(&thread, NULL, JXYUVEncodeH264::startEncode, this);

    LOGI(JNI_DEBUG, "视频编码器初始化完成")

    return 0;
}

/**
 * 发送一帧到编码队列
 * @param buf
 * @return
 */
int JXYUVEncodeH264::startSendOneFrame(uint8_t *buf) {
    int in_y_size = arguments->in_width * arguments->in_height;

    uint8_t *new_buf = (uint8_t *) malloc(in_y_size * 3 / 2);
    memcpy(new_buf, buf, in_y_size * 3 / 2);

    frame_queue.push(new_buf);

    return 0;
}

/**
 * 启动编码线程
 * @param obj
 * @return
 */
void *JXYUVEncodeH264::startEncode(void *obj) {
    JXYUVEncodeH264 *h264_encoder = (JXYUVEncodeH264 *) obj;
    while (!h264_encoder->is_end||!h264_encoder->frame_queue.empty()) {
        if (h264_encoder->frame_queue.empty()) {
            continue;
        }
        uint8_t *picture_buf = *h264_encoder->frame_queue.wait_and_pop().get();
        LOGI(JNI_DEBUG, "send_videoframe_count:%d", h264_encoder->frame_count);
        int in_y_size = h264_encoder->arguments->in_width * h264_encoder->arguments->in_height;

        h264_encoder->custom_filter(h264_encoder, picture_buf, in_y_size,
                                    h264_encoder->arguments->v_custom_format);


//        h264_encoder->pFrame->data[0] = picture_buf;
//        h264_encoder->pFrame->data[2] = picture_buf + h264_encoder->out_y_size;
//        h264_encoder->pFrame->data[1] = picture_buf + h264_encoder->out_y_size * 5 / 4;
//    memcpy(h264_encoder->pFrame->data[0],picture_buf,h264_encoder->out_y_size);
//    memcpy(h264_encoder->pFrame->data[2],picture_buf+h264_encoder->out_y_size,h264_encoder->out_y_size/4);
//    memcpy(h264_encoder->pFrame->data[1],picture_buf+h264_encoder->out_y_size*5/4,h264_encoder->out_y_size/4);
        //PTS
        h264_encoder->pFrame->pts = h264_encoder->frame_count;
        h264_encoder->frame_count++;
        int got_picture = 0;
        //Encode
        int ret = avcodec_encode_video2(h264_encoder->pCodecCtx, &h264_encoder->pkt,
                                        h264_encoder->pFrame, &got_picture);
        if (ret < 0) {
            LOGE(JNI_DEBUG, "Failed to encode! \n");
        }
        if (got_picture == 1) {
            LOGI(JNI_DEBUG, "Succeed to encode frame: %5d\tsize:%5d\n", h264_encoder->framecnt,
                 h264_encoder->pkt.size);
            h264_encoder->framecnt++;
            h264_encoder->pkt.stream_index = h264_encoder->video_st->index;
            ret = av_write_frame(h264_encoder->pFormatCtx, &h264_encoder->pkt);
            av_free_packet(&h264_encoder->pkt);
        }
        delete (picture_buf);
    }
    if (h264_encoder->is_end) {
        h264_encoder->encodeEnd();
        delete h264_encoder;
    }
    return 0;
}
/**
 * 对视频做一些处理
 * @param h264_encoder
 * @param picture_buf
 * @param in_y_size
 * @param format
 */
void
JXYUVEncodeH264::custom_filter(const JXYUVEncodeH264 *h264_encoder, const uint8_t *picture_buf,
                               int in_y_size, int format) {



    //   y值在H方向开始行
    int y_height_start_index=h264_encoder->arguments->in_height-h264_encoder->arguments->out_height;
    //   uv值在H方向开始行
    int uv_height_start_index=y_height_start_index/2;

    if (format == ROTATE_90_CROP_LT) {

        for (int i = y_height_start_index; i < h264_encoder->arguments->in_height; i++) {

            for (int j = 0; j < h264_encoder->arguments->out_width; j++) {

                int index = h264_encoder->arguments->in_width * i + j;
                uint8_t value = *(picture_buf + index);
                *(h264_encoder->pFrame->data[0] + j * h264_encoder->arguments->out_height +
                  (h264_encoder->arguments->out_height - (i-y_height_start_index) - 1)) = value;
            }
        }

        for (int i = uv_height_start_index; i < h264_encoder->arguments->in_height / 2; i++) {
            for (int j = 0; j < h264_encoder->arguments->out_width / 2; j++) {
                int index = h264_encoder->arguments->in_width / 2 * i + j;
                uint8_t v = *(picture_buf + in_y_size + index);
                uint8_t u = *(picture_buf + in_y_size * 5 / 4 + index);
                *(h264_encoder->pFrame->data[2] + (j * h264_encoder->arguments->out_height / 2 +
                                                   (h264_encoder->arguments->out_height / 2 - (i-uv_height_start_index) -
                                                    1))) = v;
                *(h264_encoder->pFrame->data[1] + (j * h264_encoder->arguments->out_height / 2 +
                                                   (h264_encoder->arguments->out_height / 2 - (i-uv_height_start_index) -
                                                    1))) = u;
            }
        }
    } else if (format == ROTATE_0_CROP_LT) {




        for (int i = y_height_start_index; i < h264_encoder->arguments->in_height; i++) {

            for (int j = 0; j < h264_encoder->arguments->out_width; j++) {

                int index = h264_encoder->arguments->in_width * i + j;
                uint8_t value = *(picture_buf + index);

                *(h264_encoder->pFrame->data[0] + (i-y_height_start_index) * h264_encoder->arguments->out_width +
                  j) = value;
            }
        }


        for (int i = uv_height_start_index; i < h264_encoder->arguments->in_height / 2; i++) {
            for (int j = 0; j < h264_encoder->arguments->out_width / 2; j++) {

                int index = h264_encoder->arguments->in_width / 2 * i + j;
                uint8_t v = *(picture_buf + in_y_size + index);

                uint8_t u = *(picture_buf + in_y_size * 5 / 4 + index);
                *(h264_encoder->pFrame->data[2] +
                  ((i-uv_height_start_index) * h264_encoder->arguments->out_width / 2 + j)) = v;
                *(h264_encoder->pFrame->data[1] +
                  ((i-uv_height_start_index) * h264_encoder->arguments->out_width / 2 + j)) = u;
            }
        }
    } else if (format == ROTATE_270_CROP_LT_MIRROR_LR) {

        int y_width_start_index=h264_encoder->arguments->in_width-h264_encoder->arguments->out_width;
        int uv_width_start_index=y_width_start_index/2;

        for (int i = 0; i < h264_encoder->arguments->out_height; i++) {

            for (int j = y_width_start_index; j < h264_encoder->arguments->in_width; j++) {