libavcodec/motion_est_template.c:842: error: Uninitialized Value
  The value read from xmax was never initialized.

libavcodec/motion_est_template.c:842:15: 
840. 
841.         // all entries in map should be in range except if the mv overflows their ME_MAP_MV_BITS bits space
842.         if(   minima[j].x > xmax || minima[j].x < xmin
                   ^
843.            || minima[j].y > ymax || minima[j].y < ymin)
844.             continue;
