removing background on video clip with roto brush

[ovis90]

So i am new to Adobe After efects. I was trying to remove background with roto brush it seems it removes only one second and I Need to remove at least 1minute. Or then I need to select the object all over again with roto brush. It will take whole day to just remove background for 1 minute clip. How do I remove background for whole clip and not just every time for one second.? Please help

[OussK · Accepted solution]

Roto brush must track your footage when you click space or play, please check this tutorial about how to use roto brush.

so you don't need to re-select the object you want to remove.

Alos try to expand the rang and direction for automatic propagation.

[Mylenium]

aside from the suggestion of actualyl learning how this stuff works, simply get used to it. Manual roto simply is laborious and tedious and can indeed take a lot of time when done right.

Mylenium