ffmpeg解封装rtsp并录制视频-（3）完成对rtsp流通过责任链接收解封装AVPacket数据并解码视频再渲染视频

主函数：

//108录制五秒视频
#include <iostream>
#include <thread>
#include "xtools.h"
#include "xdemux_task.h"
#include "xdecodetask.h"
#include "xvideo_view.h"
#include "xmux_task.h"
using namespace std;

//大华
#define CAM1 \
"rtsp://admin:admin@192.168.2.108/cam/realmonitor?channel=1&subtype=0"
//海康
#define CAM2 \
"rtsp://127.0.0.1:8554/test"
int main(int argc, char* argv[])
{
    XDemuxTask demux_task;
    for (;;)
    {
        if (demux_task.Open(CAM2))
        {
            cout << "shexiangtoudakaile!!!!";
            break;
        }
        MSleep(100);
        continue;
    }

    auto vpara = demux_task.CopyVideoPara();
    AVCodecParameters* video_para = nullptr;
    AVCodecParameters* audio_para = nullptr;
    AVRational* video_time_base = nullptr;
    AVRational* audio_time_base = nullptr;
    if (vpara)
    {
        video_para = vpara->para;
        video_time_base = vpara->time_base;
    }
    auto apara = demux_task.CopyAudioPara();
    if (apara)
    {
        audio_para = apara->para;
        audio_time_base = apara->time_base;
    }
    XMuxTask mux_task;
    if (!mux_task.Open("rtsp_out1.mp4", video_para, video_time_base,
        audio_para, audio_time_base
    ))
    {
        LOGERROR("mux_task.Open failed!");
        return -1;
    }
    demux_task.set_next(&mux_task);
    demux_task.Start();
    mux_task.Start();
    MSleep(5000);
    mux_task.Stop();

    if (!mux_task.Open("rtsp_out2.mp4", video_para, video_time_base,
        audio_para, audio_time_base
    ))
    {
        LOGERROR("mux_task.Open failed!");
        return -1;
    }
    mux_task.Start();
    MSleep(5000);
    mux_task.Stop();

    getchar();
    return 0;
}