diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c index c08a796844..7e8097864b 100644 --- a/libavformat/mxfdec.c +++ b/libavformat/mxfdec.c @@ -495,6 +495,26 @@ static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size } nb_essence_containers = avio_rb32(pb); + if (partition->this_partition && + partition->previous_partition == partition->this_partition) { + av_log(mxf->fc, AV_LOG_ERROR, + "PreviousPartition equal to ThisPartition %"PRIx64"\n", + partition->previous_partition); + /* override with the actual previous partition offset */ + if (!mxf->parsing_backward && mxf->last_forward_partition > 1) { + MXFPartition *prev = + mxf->partitions + mxf->last_forward_partition - 2; + partition->previous_partition = prev->this_partition; + } + /* if no previous body partition are found point to the header + * partition */ + if (partition->previous_partition == partition->this_partition); + partition->previous_partition = 0; + av_log(mxf->fc, AV_LOG_ERROR, + "Overriding PreviousPartition with %"PRIx64"\n", + partition->previous_partition); + } + /* some files don'thave FooterPartition set in every partition */ if (footer_partition) { if (mxf->footer_partition && mxf->footer_partition != footer_partition) {