avformat/matroskadec: Fix OOM on long streams

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
8 years ago · b347ca9341
parent a7946c8964
commit b347ca9341
1 changed files with 3 additions and 1 deletions
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@ -3234,9 +3234,11 @@ static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
        if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
            timecode < track->end_timecode)
            is_keyframe = 0;  /* overlapping subtitles are not key frame */
-        if (is_keyframe)
+        if (is_keyframe) {
+            ff_reduce_index(matroska->ctx, st->index);
            av_add_index_entry(st, cluster_pos, timecode, 0, 0,
                               AVINDEX_KEYFRAME);
+        }
    }

    if (matroska->skip_to_keyframe &&