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demux_mkv: check that subtitle type is set before accessing it

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Fixes crashes in case of unknown subtitle track being found, as
the original ARIB caption logic added in 0da0acdae8
did not attempt to take into mention tracks with unknown type.

Fixes #13106
This commit is contained in:
Dudemanguy
2023-12-16 00:21:49 +02:00
committed by Jan Ekström
parent ef56c0c20a
commit d8a0808de5
1 changed files with 1 additions and 1 deletions
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demux/demux_mkv.c
+1 -1
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@@ -1962,7 +1962,7 @@ static int demux_mkv_open_sub(demuxer_t *demuxer, mkv_track_t *track)
sh->codec->extradata = track->private_data;
sh->codec->extradata_size = track->private_size;
if (!strcmp(sh->codec->codec, "arib_caption") && track->private_size >= 3) {
if (subtitle_type && !strcmp(sh->codec->codec, "arib_caption") && track->private_size >= 3) {
struct AVCodecParameters **lavp = talloc_ptrtype(track, lavp);
talloc_set_destructor(lavp, avcodec_par_destructor);