Not sure what you mean. What specifically is the problem?
thanks for the reply mylenium. i just need to divide 3 scences of a 3 min video that i need to roto. do i divide in the main time line, or copy the 3min video over 3 times. do i do this starting in ae or can i start in mocha? can i save the 3 scences at the same time or separately? i want to add these to a different video. if i add noise reduction (video) will it interfere with rotoscoping process? thanks again...ed
To save a lot of time, use a video editing application to isolate the three clips you want to work with, then roto each one in AE.
Noise reduction will add a LOT of processing time in AE. If we knew more about the nature of the footage and the project, we could be more helpful.