libavcodec/motion_est_template.c:1099: error: Uninitialized Value
  The value read from ymin was never initialized.

libavcodec/motion_est_template.c:1099:17: 
1097. 
1098.                 if(mx>xmax || mx<xmin || my>ymax || my<ymin) continue;
1099.                 CHECK_MV(mx,my)
                      ^
1100.             }
1101.         }
