libavcodec/mpegvideo_enc.c:2865: error: Uninitialized Value
  The value read from best_s.mv_dir was never initialized.

libavcodec/mpegvideo_enc.c:2865:43: 
2863.                         int qpi, qp, dc[6];
2864.                         int16_t ac[6][16];
2865.                         const int mvdir= (best_s.mv_dir&MV_DIR_BACKWARD) ? 1 : 0;
                                                ^
2866.                         static const int dquant_tab[4]={-1,1,-2,2};
2867. 
