libavcodec/mpegvideo_enc.c:2943: error: Uninitialized Value
  The value read from best_s.mv_dir was never initialized.

libavcodec/mpegvideo_enc.c:2943:25: 
2941.                         }
2942. 
2943.                         s->mv_dir= best_s.mv_dir;
                              ^
2944.                         s->mv_type = best_s.mv_type;
2945.                         s->mb_intra= 0;
