How to calculate timecode in second

Hi All,

I am using markers#createMarker function to create marker on clip. It expects timecode value in second. Can anyone explain how to convert the timecode in second?

E.g. I want to create a marker at "00:00:02:07" and clip's FPS is "14" then what would be the correct timecode value in seconds?

Premiere Pro version: 11.0.2
Extension Type: Panel

Thanks & Regards,
Meet Tank