static int getrtp2(int fd, struct rtpheader *rh, char** data, int* lengthData) {
  static char buf[1600];
  unsigned int intP;
  char* charP = (char*) &intP;
  int headerSize;
  int lengthPacket;
  int extensionLength;

  lengthPacket=recv(fd,buf,1590,0);
  if (lengthPacket<0)
    mp_msg(MSGT_NETWORK,MSGL_ERR,"rtp: socket read error\n");
  else if (lengthPacket<12)
    mp_msg(MSGT_NETWORK,MSGL_ERR,"rtp: packet too small (%d) to be an rtp frame (>12bytes)\n", lengthPacket);
  if(lengthPacket<12) {
    *lengthData = 0;
    return 0;
  }
  rh->b.v  = (unsigned int) ((buf[0]>>6)&0x03);
  rh->b.p  = (unsigned int) ((buf[0]>>5)&0x01);
  rh->b.x  = (unsigned int) ((buf[0]>>4)&0x01);
  rh->b.cc = (unsigned int) ((buf[0]>>0)&0x0f);
  rh->b.m  = (unsigned int) ((buf[1]>>7)&0x01);
  rh->b.pt = (unsigned int) ((buf[1]>>0)&0x7f);
  intP = 0;
  memcpy(charP+2,&buf[2],2);
  rh->b.sequence = ntohl(intP);
  intP = 0;
  memcpy(charP,&buf[4],4);
  rh->timestamp = ntohl(intP);
  extensionLength = 0;

  if(rh->b.x == 1) { /* check extension-flag */
    if(((unsigned char)buf[12] == 0xba) && ((unsigned char)buf[13] == 0xbe)) { /* NKF - IDENTIFIER */
      intP = 0;
      memcpy(charP+2,&buf[14],2);       /* NKF - DATALENGTH */
      extensionLength = ntohl(intP)+16;  /* NKF - DATALENGTH + NKF-HEADER(10) + NKF-TRAILER(6)*/
    }
  }

  headerSize = 12 + 4*rh->b.cc + extensionLength; /* in bytes */

  *lengthData = lengthPacket - headerSize;
  *data = (char*) buf + headerSize;

  //  mp_msg(MSGT_NETWORK,MSGL_DBG2,"Reading rtp: v=%x p=%x x=%x cc=%x m=%x pt=%x seq=%x ts=%x lgth=%d\n",rh->b.v,rh->b.p,rh->b.x,rh->b.cc,rh->b.m,rh->b.pt,rh->b.sequence,rh->timestamp,lengthPacket);

  return(0);
}