libavcodec/motion_est_template.c:623: error: Uninitialized Value
  The value read from ymin was never initialized.

libavcodec/motion_est_template.c:623:15: 
621.            || x - dia_size < xmin
622.            || y + dia_size > ymax
623.            || y - dia_size < ymin)
                   ^
624.            continue;
625. 
