Hi again,
Similar setup here, I want to use TWO (2) GoPro cameras simultaneously to record front and back image sequences.
I have been happy with interpolate_directions at mapillary command line tools so far, as per the command line tool mentioned here:
http://mapillary.trydiscourse.com/t/my-gopro7-setup-and-workflow/3120/12
*** edit: it turns out I can use both interpolate_directions AND offset_angle set to 180 for the backwards facing camera sequence just by adding
—offset_angle 180
Did a trial run, worked flawlessly 