func: static int mpeg4_decode_gop_header(MpegEncContext *s, GetBitContext *gb)
  
  {
  
      int hours, minutes, seconds;
  
  
  
      if (!show_bits(gb, 23)) {
  
          av_log(s->avctx, AV_LOG_WARNING, "GOP header invalid\n");
  
          return -1;
  
      }
  
  
  
      hours   = get_bits(gb, 5);
  
      minutes = get_bits(gb, 6);
  
      skip_bits1(gb);
  
      seconds = get_bits(gb, 6);
  
  
  
      s->time_base = seconds + 60*(minutes + 60*hours);
  
  
  
      skip_bits1(gb);
  
      skip_bits1(gb);
  
  
  
      return 0;
  
  }
  