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avformat/matroskaenc: Make sure UIDs of delayed chapters are != 0 

This has previously only been checked if the chapters were initially
available, but not if they were only written in the trailer.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-04-27 03:12:24 +02:00
parent 6397b4d6a2
commit 0aed3002ad
1 changed files with 7 additions and 6 deletions
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13
libavformat/matroskaenc.c
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@ -1437,6 +1437,12 @@ static int mkv_write_chapters(AVFormatContext *s)
if (!s->nb_chapters || mkv->wrote_chapters)
return 0;
for (i = 0; i < s->nb_chapters; i++)
if (!s->chapters[i]->id) {
mkv->chapter_id_offset = 1;
break;
}
mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
ret = start_ebml_master_crc32(&dyn_cp, mkv);
@ -1863,12 +1869,6 @@ static int mkv_write_header(AVFormatContext *s)
if (ret < 0)
return ret;
for (i = 0; i < s->nb_chapters; i++)
if (!s->chapters[i]->id) {
mkv->chapter_id_offset = 1;
break;
}
ret = mkv_write_chapters(s);
if (ret < 0)
return ret;
@ -1879,6 +1879,7 @@ static int mkv_write_header(AVFormatContext *s)
return ret;
}
/* Must come after mkv_write_chapters() because of chapter_id_offset */
ret = mkv_write_tags(s);
if (ret < 0)
return ret;