Resetting TC to 00:00:00:00

[lightsailvr]

I believe when processing the files using this tool, it's overwriting the timecode metadata values to 00:00:00:00 even if the original file is different. For example, our files typically start at 00:59:50:00 and first frame of picture is at 01:00:00:00.

Is there a way to manually override the TC values?