CHAPTER_HEADER_SIZE  227 libavformat/aadec.c         chapter_pos -= start + CHAPTER_HEADER_SIZE * chapter_idx;
CHAPTER_HEADER_SIZE  234 libavformat/aadec.c     st->duration = (largest_size - CHAPTER_HEADER_SIZE * s->nb_chapters) * TIMEPREC;
CHAPTER_HEADER_SIZE  350 libavformat/aadec.c     chapter_start = c->content_start + (ch->start / TIMEPREC) + CHAPTER_HEADER_SIZE * (1 + chapter_idx);