From: Tomas Härdin <[email protected]> Such files have IndexTableSegments which when parsed cover EditUnit ranges like this:
[0,1) [249,250) [249,377) [0,249) where each interval is [IndexStartPosition, IndexStartPosition + IndexDuration) This would be reduced to a sparse index like: [0,1), [249,250) instead of the full range: [0,249), [249,377) Sample: http://streams.videolan.org/issues/7302/TimeCode_HD.mxf Signed-off-by: Luca Barbato <[email protected]> --- libavformat/mxfdec.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c index 7bca23d..2fc31bf 100644 --- a/libavformat/mxfdec.c +++ b/libavformat/mxfdec.c @@ -980,19 +980,23 @@ static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segment /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */ for (i = 0; i < nb_segments; i++) { int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1; + uint64_t best_index_duration = 0; for (j = 0; j < nb_segments; j++) { MXFIndexTableSegment *s = unsorted_segments[j]; /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates. * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around. + * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have. */ if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) && - (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start)) { + (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start || + (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) { best = j; best_body_sid = s->body_sid; best_index_sid = s->index_sid; best_index_start = s->index_start_position; + best_index_duration = s->index_duration; } } -- 1.8.5.1 _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
