cmdutils.c:1512: error: Uninitialized Value
  The value read from type was never initialized.

cmdutils.c:1512:21: 
1510.             int i, index = strtol(spec, NULL, 0);
1511.             for (i = 0; i < s->nb_streams; i++)
1512.                 if (s->streams[i]->codecpar->codec_type == type && index-- == 0)
                          ^
1513.                    return i == st->index;
1514.             return 0;
