libavcodec/motion_est_template.c:149: error: Uninitialized Value
  The value read from ymin was never initialized.

libavcodec/motion_est_template.c:149:9: 
147. 
148.     if (mx > xmin && mx < xmax &&
149.         my > ymin && my < ymax) {
             ^
150.         int d= dmin;
151.         const int index= (my<<ME_MAP_SHIFT) + mx;
