• Adobe After Effects

  GreenScreen Question For Experts

  Posted by Abdulla_smith on August 8, 2007 at 8:21 pm

  hi

  i want to do a greenscreen sence
  but this sence is moving how can i make the picture stilled on the greenscreen even when moving the camera

  like

  i did a greenscreen footage
  and while capturing i zoomed the camera i want even the picture to be zoomed in the greenscreen.

  thanks
  bye

  Andres Bocan replied 18 years, 12 months ago 3 Members · 2 Replies
• 2 Replies

• 

  Kevin Camp

  August 8, 2007 at 8:43 pm

  ideally you would have tracking points on your green screen to use to aid in matching the camera move (either manually of for tracking with ae’s motion tracker or other motion tracking software).

  since it sounds like you do’t have those, you can try tracking points on the subject and using those. this will only work if your subject is not moving much… the points you track will need to be consistent to be able to use them to track scale. example: if the subjuect was facing the camera the whole time you may be able to track points on each shoulder, or even ears to establish scale. then apply that motion to the background layer.

  check the manual and help menu for how to use the tracker controls. you may be able to find a tutorial here too, try searching for ‘motion tracker’

  Kevin Camp
  Designer – KCPQ, KMYQ & KRCW
• 

  Andres Bocan

  August 9, 2007 at 2:28 am

  Hey

  You need to stick track point on greenscreen. You may use blue track point, red or even white but you must have in mind that track point must be seen on shot while it takes place. If you are gonna make a zoom you will need at least 3 track point.
  Just put them like a triangle and remember because it seems you haven’t than this, keep them inside th shoot. Afterwards when you have the track data you will use it to delete track points too

  Andrew
  Visual effect Artist

Reply to this Discussion! Login or Sign Up