Use videos from camera roll as input
This would allow for a non-destructive workflow and controlled experimentation of settings. Also, you could reprocess a video for even longer 360 exposures.
Thanks for listening!
James Thomas commented
Also you could include a short sample video that has a movement of light, midrange and dark shapes on light, midrange, and dark backgrounds.
That could be used to produce previews of settings and presets: and allow controlled tweaking of those presets.