libavcodec/mpegvideo_enc.c:2431: error: Uninitialized Value
  The value read from best_s.qscale was never initialized.

libavcodec/mpegvideo_enc.c:2431:17: 
2429.                 }
2430. 
2431.                 s->current_picture.qscale_table[xy]= best_s.qscale;
                      ^
2432. 
2433.                 copy_context_after_encode(s, &best_s, -1);
