I'm trying to isolate a frame from a sequence and insert it masked with a offset (both time and space) over that same sequence emulating an enhanced dustbuster node. I've tried all the time operations but somehow I just cant get it to have a starting offset in time. Only thing that worked somehow is to have a constant black then append the frame then add some more constant black after (becouse some nodes get confused when one of their inputs gets undefined).

Any suggestions?