libavcodec/mpegvideo_enc.c:3168: error: Buffer Overrun L2
  Offset: [-63, 127] Size: 65.

libavcodec/mpegvideo_enc.c:3060:9: <Offset trace>
3058.         /* note: block[0] is assumed to be positive */
3059.         block[0] = (block[0] + (q >> 1)) / q;
3060.         start_i = 1;
              ^
3061.         last_non_zero = 0;
3062.         qmat = s->q_intra_matrix[qscale];

libavcodec/mpegvideo_enc.c:3060:9: Assignment
3058.         /* note: block[0] is assumed to be positive */
3059.         block[0] = (block[0] + (q >> 1)) / q;
3060.         start_i = 1;
              ^
3061.         last_non_zero = 0;
3062.         qmat = s->q_intra_matrix[qscale];

libavcodec/mpegvideo_enc.c:3011:1: <Length trace>
3009. }
3010. 
3011. static int dct_quantize_trellis_c(MpegEncContext *s,
      ^
3012.                                   DCTELEM *block, int n,
3013.                                   int qscale, int *overflow){

libavcodec/mpegvideo_enc.c:3011:1: Array declaration
3009. }
3010. 
3011. static int dct_quantize_trellis_c(MpegEncContext *s,
      ^
3012.                                   DCTELEM *block, int n,
3013.                                   int qscale, int *overflow){

libavcodec/mpegvideo_enc.c:3168:30: Array access: Offset: [-63, 127] Size: 65
3166.                     int run= i - survivor[j];
3167.                     int score= distortion + length[UNI_AC_ENC_INDEX(run, level)]*lambda;
3168.                     score += score_tab[i-run];
                                   ^
3169. 
3170.                     if(score < best_score){
