How to show total running time of video on OSD with MPDisplay++? (1 Viewer)

[blue sky]

I'm using MPDisplay++ to show a time counter in a small secondary screen while I watch videos on the main screen, in the manner of a traditional hardware DVD player. So far I have it showing time elapsed, and time remaining in the video. I would like to show time elapsed, and total running time of video, instead of time remaining, which seems to be the default in the MP OSD. Is there a way to do this?