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matroskademux: filter bogus index entries with missing block number

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... to avoid contradictory information resulting in seeks sending more
downstream than needed for the corresponding segment.
This commit is contained in:
Mark Nauwelaerts 2011-12-13 18:18:45 +01:00
parent 00ed34d2eb
commit ebfc77da19
1 changed files with 15 additions and 0 deletions
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15
gst/matroska/matroska-read-common.c
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@ -982,6 +982,21 @@ gst_matroska_read_common_parse_index_cuetrack (GstMatroskaReadCommon * common,
DEBUG_ELEMENT_STOP (common, ebml, "CueTrackPositions", ret);
/* (e.g.) lavf typically creates entries without a block number,
* which is bogus and leads to contradictory information */
if (common->index->len) {
GstMatroskaIndex *last_idx;
last_idx = &g_array_index (common->index, GstMatroskaIndex,
common->index->len - 1);
if (last_idx->block == idx.block && last_idx->pos == idx.pos &&
last_idx->track == idx.track && idx.time > last_idx->time) {
GST_DEBUG_OBJECT (common, "Cue entry refers to same location, "
"but has different time than previous entry; discarding");
idx.track = 0;
}
}
if ((ret == GST_FLOW_OK || ret == GST_FLOW_UNEXPECTED)
&& idx.pos != (guint64) - 1 && idx.track > 0) {
g_array_append_val (common->index, idx);