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avformat/matroskaenc: fix MAX_CUEPOINT_SIZE calculation

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Fixes assertion failure
Fixes Ticket3822

as a side-effect this makes some mkv files a few bytes smaller

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-08-09 04:49:09 +02:00
parent d6af706eee
commit 64d029de41
2 changed files with 16 additions and 3 deletions
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15
libavformat/matroskaenc.c
View File

@ -445,8 +445,21 @@ static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tra
ebml_master cuepoint, track_positions;
mkv_cuepoint *entry = &cues->entries[i];
uint64_t pts = entry->pts;
int ctp_nb = 0;
cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(num_tracks));
// Calculate the number of entries, so we know the element size
for (j = 0; j < num_tracks; j++)
tracks[j].has_cue = 0;
for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
int tracknum = entry[j].stream_idx;
av_assert0(tracknum>=0 && tracknum<num_tracks);
if (tracks[tracknum].has_cue && s->streams[tracknum]->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
continue;
tracks[tracknum].has_cue = 1;
ctp_nb ++;
}
cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(ctp_nb));
put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts);
// put all the entries from different tracks that have the exact same

4
tests/ref/lavf/mkv
View File

@ -1,5 +1,5 @@
bda342503392d517955e1112def7b03a *./tests/data/lavf/lavf.mkv
472671 ./tests/data/lavf/lavf.mkv
bab98f5a04a9f7991fb960041c996478 *./tests/data/lavf/lavf.mkv
472668 ./tests/data/lavf/lavf.mkv
./tests/data/lavf/lavf.mkv CRC=0xec6c3c68
c93950920d4ee57eb3ff5ba0cf0c8b19 *./tests/data/lavf/lavf.mkv
320412 ./tests/data/lavf/lavf.mkv