Split subtitles are kind of working: https://docs.kdenlive.org/de/effects_and_compositions/subtitles.html#split-subtitle-after-first-line
Merge subtitle is not implemented so far. With an upcoming Kdenlive version: Whisper; allow setting a maximum character count per subtitle. On Bugtracker (https://bugs.kde.org/enter_bug.cgi?product=kdenlive), please open a whishlist request (under Severity) for “subtitle merge” or other features subtitle related. Eugen Am 29.03.2024 um 19:29 schrieb Mubri Mubri:
Hi Kdenlive Team, Add option to split and merge subtitle lines with previous and next one. As you know that some subtitle lines are long and some are short. I mean number of words in each subtitle lines.