Adobe After Effects Rotobrush help

[EYEREX]

Hello all i'm just having a play with Rotobrush in Adobe After Effects but i'm having a problem where it's only showing a few seconds of the video having the part cut out and then it go's back to item with it's background

I need it to cut out my avatar from the whole 12min video

 

[EYEREX]

Cheers for the info, worked out in the end that theres a small bar just below the timeline which you have to drag out which then renders the whole clip

PS so true about not being worth it as did a test of a 1min clip which took over an hour

Have to say Ultra in adobe premiere isn't to bad to do a quick removal but can be a bit hit and miss if background isn't one colour

Little test below

 

[EYEREX]

Just did an update as was having problems with his shoes and i pretty happy how it has come out