libavcodec/motion_est_template.c:942: error: Uninitialized Value
  The value read from xmin was never initialized.

libavcodec/motion_est_template.c:942:16: 
940.         }
941. 
942.         start= FFMAX(0, -x + dia_size + xmin );
                    ^
943.         end  = FFMIN(dia_size, ymax - y + 1);
944.         for(dir= start; dir<end; dir++){
