-static int mkv_write_chapters(AVFormatContext *s)
-{
- MatroskaMuxContext *mkv = s->priv_data;
- AVIOContext *dyn_cp = NULL, *pb = s->pb;
- ebml_master editionentry;
- AVRational scale = {1, 1E9};
- int i, ret;
-
- if (!s->nb_chapters || mkv->wrote_chapters)
- return 0;
-
- mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
-
- ret = start_ebml_master_crc32(&dyn_cp, mkv);
- if (ret < 0) return ret;
-
- editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
- if (mkv->mode != MODE_WEBM) {
- put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
- }
- for (i = 0; i < s->nb_chapters; i++) {
- ebml_master chapteratom, chapterdisplay;
- AVChapter *c = s->chapters[i];
- int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
- int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
- AVDictionaryEntry *t = NULL;
- if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
- av_log(s, AV_LOG_ERROR,
- "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
- chapterstart, chapterend);
- return AVERROR_INVALIDDATA;
- }
-
- chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
- put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID,
- (uint32_t)c->id + (uint64_t)mkv->chapter_id_offset);
- put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
- put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
- if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
- chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
- put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
- put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
- end_ebml_master(dyn_cp, chapterdisplay);
- }
- end_ebml_master(dyn_cp, chapteratom);
- }
- end_ebml_master(dyn_cp, editionentry);
- end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS, 0, 0);
-
- mkv->wrote_chapters = 1;
- return 0;
-}
-
-static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)