• Adobe After Effects

  Roto brush, again!

  Posted by Ben Hartley on May 30, 2011 at 12:14 pm

  I have made a stationary loop of a figure walking up stairs in After effects. I made the rotoscoped video move diagonally in the direction of the stairs so it would stay in the same position. But when i render it it has these blobs coming off the back of it which you cannot see in the workspace? is this something to do with the roto brush?? This is rendered , its just int he workspace here.

  Any help is much appreciated! Final project hand in looms!

  Ben Hartley replied 14 years, 11 months ago 3 Members · 3 Replies
• 3 Replies

• 

  Roland R. kahlenberg

  May 30, 2011 at 2:30 pm

  [Ben Black] ” I made the rotoscoped video move diagonally in the direction of the stairs so it would stay in the same position”

  I’m unsure as to what you have done to achieve this.

  If you had stabilized the shot prior to rotobrushing then that’s good. Your next step is to re-introduce the natural camera movements by inverse/reverse stabilizing the footage.

  Snapshots of your comp as well as individual layers will allow others to better assist you.

  Cheers
  RoRK

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• 

  Cassius Marques

  May 30, 2011 at 2:37 pm

  Is your rotobrushed footage pre-rendered? It could be related to frame rate mismatch between your rotobrushed calculations and your desired render output.
• 

  Ben Hartley

  May 30, 2011 at 3:33 pm

  No i did not pre render the stabalised movement before roto brushing, but i will try that now and get back to you!

  Thanks for replying.

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