Sometimes languages change places

[soshial]

07m48s (French is in the bottom):

08m02s (French is in the top):

Subs here: Les.Revenants.1x02.jmt.ass.zip

PS. Thank you so much for such a good and easy AND OPEN-SOURCE subtitle merger! This really helps me learn French! Merci beaucoup de la Russie <3

[glowinthedark]

This is indeed happening, but this has nothing to do with the merge script — adjust your subtitle styles so that the text fits in its designated position. See the specs https://www.matroska.org/technical/specs/subtitles/ssa.html

offtopic: here is a python version of the SRT merge script (depends on the srt module that needs to be installed with pip3 install srt) — it does not involve complicated ASS formatting; basic colors and formatting can be done with SRT alone.

[soshial]

But on these screenshots text is not big at all!

[dnbn]

Years ago I've developed a tools similar to 2srt2ass here (cause I didn't know this one).
To solve this issue I simply added a margin to the top subtitle (code is here). On my experience It is working fine on VLC at least.