I have an alembic of some splashing water. I'd like to use it in slow motion, 20% speed. Is there any way to do that? I believe alembics have no concept of frames, which seems like it should mean it's easy to get them to interpret at a different rate. But I don't see any way to get an alembic that lasts x number of frames to play over x*5 frames.
Yes, I've just needed to do the same... Turn on and keyframe "Override Frame" value in MeshSechuenceCache modifier where are the alembic data options. First keframe 0 - on frame 0 and second keyframe 100 on frame 100(if you alembic has 100 frames). Then go to graph editor and turn of "Only show selected" tick on the righ top panel. Find your custom alembic curve and adjust it how ever you need.