func: static int flv_probe(AVProbeData *p)
  
  {
  
      const uint8_t *d;
  
  
  
      if (p->buf_size < 6)
  
          return 0;
  
      d = p->buf;
  
      if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V' && d[3] < 5 && d[5]==0) {
  
          return AVPROBE_SCORE_MAX;
  
      }
  
      return 0;
  
  }
  