使用ffmpeg获取视频流后如何封装存储成mp4文件

int main(int argc,char *argv[])

{

 AVFormatContext *pFormatCtx;

 int i,videoStream;

 AVCodecContext *pCodecCtx;

 AVPacket packet;

 //H264Context *h;

 int type=0; 

 //Open video file

 char rtsp[100]="";

 char filename[150]="";

 char *p=NULL;

 char camid[6]="";

 char log[100]="";

 char new_file[200]="";

 char command[200]="";

 char file_jpg[200]="";

 

 if(argc!=3)

 {

  exit(1);

 }

  

 strcpy(rtsp,argv[1]);

 strcpy(filename,argv[2]);

 p=strstr(filename,"cam");

 memcpy(camid,p,5);

 

 signal(SIGTERM,recv_signal);

 signal(SIGUSR1,recv_signal);

 signal(SIGHUP,recv_signal);

 signal(SIGSEGV,recv_signal);

 strcpy(File_Name,filename);

 

 //Register all formats and codecs

 av_register_all();

 avformat_network_init();

 

 if(av_open_input_file(&pFormatCtx,rtsp,NULL,0,NULL)!=0)

 {

  sprintf(log,"%s [%s] %s","The ",rtsp," stream open error\n");

  write_log(camid,log);

  exit(1);

 }

 

 //Retrieve stream information

 if(av_find_stream_info(pFormatCtx)<0)

 {

  sprintf(log,"%s","Video Flow information check error\n");

  write_log(camid,log);

  return -1;

 }

 

 //Dump information about file onto standard error

 av_dump_format(pFormatCtx,0,rtsp,0);

 

 //Find the first video stream

 videoStream=-1;

 for(i=0;i<pFormatCtx->nb_streams;i++)

 {

  if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO)

  {

   videoStream=i;

   break;

  }

 }

 

 if(videoStream==-1)

 {

  sprintf(log,"%s","Didn't find a video stram\n");

  write_log(camid,log);

  return -1;

 }

 

 pCodecCtx=pFormatCtx->streams[videoStream]->codec;

 //open file

 FILE *fp=NULL;

 //char *filename="/home/MEDIA/project/linux/test.mp4";

 

 if((fp=fopen(filename,"wb"))==NULL)

 {

  sprintf(log,"%s%s",filename," open failed\n");

  write_log(camid,log);

  exit(1);

 }

/*这里打开了一个test.mp4的文件，下面怎么封装存储就不知道了，请各位大哥指导！帮助指点下封装成mp4文件的主要函数部分*/