libavcodec/motion_est_template.c:869: error: Uninitialized Value
  The value read from ymax was never initialized.

libavcodec/motion_est_template.c:869:15: 
867. 
868.         if(   x >= xmax || x <= xmin
869.            || y >= ymax || y <= ymin)
                   ^
870.            continue;
871. 
