Render to a lossless file with alpha channel and re-import?
There's no need to export a file.
You can apply the Timewarp effect directly to a Pre-Comp.
Timewarp includes Pixel Motion as one of its' methods. Note that at default settings, Timewarp sets speed to 50 per cent. You can change it to any other value, but if you set it to 100 per cent, Pixel Motion will probably not trigger at all.
I've been experimenting with the TimeWarp/Pixel Motion settings.
I'm liking some of the results, but somehow they're not behaving as i'd like. The effect is somehow very much effected by the time aspects, yielding strange timing results. A setting of 100 corrects this.... but as you mention it doesn't trigger any effects. A pity.
I guess I'm looking for a similar effect which doesn't mess with the time aspects... ie: If I have 10 still frames of a cube spinning around its axis, and pre comp/stretch this into a 120 frame comp, I'm looking for an effect which will merely interpolate between frames.. kind of like an inbetweener.
Any ideas of an AE functionality or plugin for this?
One thing you may try is speed up the footage (using Time Stretch) to 50 per cent, and then apply Timewarp at 50 per cent, set to Pixel Motion (note that Time Stretch's values are "stretch factor" and timewarp's is a more traditional speed percentage, so Time Stretch at 50 per cent would be 200 per cent speed).
There are a million other things you could try. For example, "Posterize Time" undersamples the frame rate, and then you could use Timewarp/Pixel Motion on top of it. If you set Posterize Time to a really low frame rate, then you may get some extreme frame interpolation.
Yeah, I discovered that setting the Speed to 50, then pre comp this into another with a time stretch of 200% came very close. However, I’m also trying to utilize Time Remap for lip sync, I’m concerned that enabling Time warp will create strange timing behaviors.
I’ll try messing with the "Posterize Time" settings, as per your suggestion, and see what happens.