Transitions

--transition KIND:DURATION[:MIN-CUT] puts a transition at each cut auto-editor makes, and at the start and end of the timeline. The video and audio transitions are linked: they cover the same span.

auto-editor video.mp4 --transition dissolve:1sec        # cross-dissolves, fades at the ends
auto-editor video.mp4 --transition push:0.5sec          # a Premiere Pro transition
auto-editor video.mp4 --transition clock-wipe:1sec:0    # at every cut, however short
auto-editor video.mp4 --transition constant-power:1sec  # audio crossfade kind; video dissolves

• DURATION: how long each transition lasts (0.5sec, or a bare frame count).
• MIN-CUT (default 1sec): skip cuts whose removed source is shorter than this, so trimming a short pause stays a hard cut instead of a stutter. 0 transitions at every cut.

A transition draws on the footage that was cut out (its handles), so: