第1课配置FFmpeg+OpenCV开发环境

一、配置开发环境

1.下载FFmpeg+OpenCV开发所用的SDK压缩包，并解压到E:\SDK下，解压后的路径应为：E:\SDK\ffmpeg-sdk\58\x86\dll及E:\SDK\opencv-sdk\340\x86\dll。

2.新建VC++项目，名称为demo1，项目类弄为MFC应用程序，并按以下图标进行配置，其余选项默认即可。

3.删除对话框中默认控件，右单击打开工程“属性”页并配置包含文件目录及库目录。

（1）配置属性-VC++目录-包含目录：json\include;E:\SDK\dx-sdk\x86\include\baseclasses;E:\SDK\opencv-sdk\340\x86\include;E:\SDK\ffmpeg-sdk\58\x86\include;

（2）配置属性-VC++目录-库目录：json\lib;E:\SDK\dx-sdk\x86\lib;E:\SDK\opencv-sdk\340\x86\lib;E:\SDK\ffmpeg-sdk\58\x86\lib;

（3）配置属性-链接器-输入-附加依赖项：avcodec.lib;avformat.lib;avutil.lib;avdevice.lib;avfilter.lib;postproc.lib;swresample.lib;swscale.lib;strmbase.lib;winmm.lib;opencv_core340d.lib;opencv_highgui340d.lib;opencv_imgproc340d.lib;opencv_videoio340d.lib;

二、编写代码测试环境搭建是否正确。

1.右单击项目新建类，类名为fmlp。

2.打开fmlp.h并加入常用头文件，注意ffmpeg头文件要用extern "C"包含。

#pragma once
#include <dshow.h>
#include <queue>
extern "C"
{
#include "libavcodec/avcodec.h"
#include "libavcodec/dxva2.h"
#include "libavformat/avformat.h"
#include "libavfilter/buffersink.h"
#include "libavfilter/buffersrc.h"
#include "libavutil/avutil.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/time.h"
#include "libavutil/mathematics.h"
#include "libavdevice/avdevice.h"
#include "libswscale/swscale.h"
#include "libswresample/swresample.h"
#include "libavutil/audio_fifo.h"
#include "libavutil/imgutils.h"
};
#include <opencv/cxcore.h>
#include <opencv/cv.h>
#include <opencv2/highgui/highgui_c.h>
#include <opencv2/opencv.hpp>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
using namespace std;
class fmlp
{
public:
   fmlp();
   ~fmlp();
   int init();
};

3.打开fmlp.cpp并输入以下测试代码：

#include "stdafx.h"
#include "fmlp.h"

fmlp::fmlp()
{
init();
}

fmlp::~fmlp()
{
}

int fmlp::init()
{
   TRACE("init.....\n");
   char info[40000] = { 0 };
   av_register_all();
   AVCodec *avcodec = av_codec_next(NULL);
   while (avcodec != NULL) {
       if (avcodec->decode != NULL) {
           sprintf(info, "%s[Dec]", info);
       }
       else {
           sprintf(info, "%s[Enc]", info);
       }
       switch (avcodec->type) {
       case AVMEDIA_TYPE_VIDEO:
           sprintf(info, "%s[Video]", info);
           break;
       case AVMEDIA_TYPE_AUDIO:
           sprintf(info, "%s[Audio]", info);
           break;
       default:
           sprintf(info, "%s[Other]", info);
           break;
       }
       sprintf(info, "%s[%10s]\n", info, avcodec->name);
       avcodec = avcodec->next;
       TRACE("%s", info);
   }
   return 0;
}