Only the OPAtom demuxing logic is guaranteed to have index tables, meaning OP1a files that lack an index would cause SIGSEGV. --- libavformat/mxfdec.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c index fb9cac4..9051874 100644 --- a/libavformat/mxfdec.c +++ b/libavformat/mxfdec.c @@ -1763,6 +1763,10 @@ static void mxf_packet_timestamps(MXFContext *mxf, AVPacket *pkt) int64_t next_ofs; MXFIndexTable *t = &mxf->index_tables[0]; + /* this is called from the OP1a demuxing logic, which means there may be no index tables */ + if (mxf->nb_index_tables <= 0) + return; + /* find mxf->current_edit_unit so that the next edit unit starts ahead of pkt->pos */ for (;;) { if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0) @@ -1844,6 +1848,7 @@ static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt) return mxf_read_packet_old(s, pkt); /* OPAtom - clip wrapped demuxing */ + /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */ st = s->streams[0]; t = &mxf->index_tables[0]; -- 1.7.5.4 _______________________________________________ libav-devel mailing list libav-devel@libav.org https://lists.libav.org/mailman/listinfo/libav-devel