public TransportStreamSubtitle(BluRaySup.BluRaySupParser.PcsData bdSup, ulong startMilliseconds, ulong endMilliseconds, ulong offset)
 {
     _bdSup = bdSup;
     StartMilliseconds = startMilliseconds;
     EndMilliseconds = endMilliseconds;
     OffsetMilliseconds = offset;
 }
 public TransportStreamSubtitle(BluRaySup.BluRaySupParser.PcsData bdSup, ulong startMilliseconds, ulong endMilliseconds)
 {
     this.bdSup = bdSup;
     StartMilliseconds = startMilliseconds;
     EndMilliseconds = endMilliseconds;
 }