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-rw-r--r--libavformat/matroskadec.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 8d7db90e1b..424d7bfe90 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -3076,6 +3076,7 @@ static int matroska_read_seek(AVFormatContext *s, int stream_index,
tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
tracks[i].end_timecode = 0;
if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
+ tracks[i].stream &&
tracks[i].stream->discard != AVDISCARD_ALL) {
index_sub = av_index_search_timestamp(
tracks[i].stream, st->index_entries[index].timestamp,