DiracParseContext *pc = s->priv_data;
if (pc->overread_index) {
- memcpy(pc->buffer, pc->buffer + pc->overread_index,
+ memmove(pc->buffer, pc->buffer + pc->overread_index,
pc->index - pc->overread_index);
pc->index -= pc->overread_index;
pc->overread_index = 0;