libavcodec/h264.c:3661: error: Buffer Overrun L3
  Offset added: 256 Size: [0, +oo].

libavcodec/h264.c:3646:1: <Length trace>
3644.  * Replicates H264 "master" context to thread contexts.
3645.  */
3646. static void clone_slice(H264Context *dst, H264Context *src)
      ^
3647. {
3648.     memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));

libavcodec/h264.c:3646:1: Parameter `src->short_ref[*]`
3644.  * Replicates H264 "master" context to thread contexts.
3645.  */
3646. static void clone_slice(H264Context *dst, H264Context *src)
      ^
3647. {
3648.     memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));

libavcodec/h264.c:3661:5: Array access: Offset added: 256 Size: [0, +oo]
3659.     dst->short_ref_count        = src->short_ref_count;
3660. 
3661.     memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
          ^
3662.     memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
3663.     memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
