Create roto only to a 3 second clip

[human_2636]

I want to cteate a roto of only 3 swcond clip which is cut from the original clip. Now wat happens is that to rotto I have to go out in individual video layer and totto the whole video and everytime I make changes it loads and takes a lot of memory.

What I want to do is simply only roto that 3 particular seconds. How can I achieve. Thanks.

[ShiveringCactus]

When you double-click on th e layer in order to apply the roto brush, do you see your start and end points created, like this:

When I then preview the rotobrush, it only goes between these two points.  And don't forget to Freeze the roto, and that way it won't keep reloading.

[human_2636]

Thank you so much I will try that. I made a mistake of not freezing. 😐