libavcodec/mpeg4videodec.c:1054: error: Uninitialized Value
  The value read from dc_pred_dir was never initialized.

libavcodec/mpeg4videodec.c:1054:9: 
1052.         }
1053. 
1054.         ff_mpeg4_pred_ac(s, block, n, dc_pred_dir);
              ^
1055.         if (s->ac_pred) {
1056.             i = 63; /* XXX: not optimal */
