Problems with converting Nico files (to ass)

[Deckerd9]

1. The difference in vertical values of the move function in a ass file is too large(second and fourth parameters)
   like this {\move(1920, 144, -720, 144)} next comment-> {\move(1920, 288, -672, 288)}
   There's a huge gap between the two comments
   changing the screen size setting doesn't change the large gap
   (because of this problem, I touched all the setting prices, but I failed to narrow the gap)
   there is too much blank vertical space between the on-screen comments

2. Comments are not used even though there is a longitudinal space left.
   If it's likely to overlap, need to utilize longitudinal space, but it's not
   so there are too many overlapping situations(in case of long comment)
   It's not really like this in Nico-dong

I ask you to solve this problem