Startup Premiere Elements
  1. Go into SETTINGS first to confirm that the project will be in DV-NTSC WIDESCREEN format
  2. Start a NEW PROJECT, and name and locate it in your D: Drive folder

Import your Media
  1. Choose FILES and FOLDERS
  2. CTRL-Click on
    1. "SaucerBackground Video2.avi"
    2. "Saucer CGI" (either your render, or the one provided by this demo)
Build the Timeline
(Make sure you're in the "Timeline" mode in the bottom left, and not "Sceneline")

  1. Drag the LIVE ACTION clip (Saucer Background) into the VIDEO1 track of the timeline
    (You may have to scroll to it, or drag the clip to it after the fact)
    1. Be sure it's against the LEFT hand side
    2. Expand the ZOOM slider to let it fill the screen
  2. Scroll up and drag the "Saucer CGI" clip to the VIDEO2 track

You can "clean up" the timeline by right mouseclicking and choosing "Delete Empty Tracks)
Apply the transparency
(Note: this demo uses "bluescreen", but you can use "greenscreen" if that's what you've built into your scene)
  1. Select the Bluescreen clip in the timeline
  2. Select the Fx (Effects) button at the top of the screen
  3. Change "Show All" to "KEYING"
  4. Select the "Blue Screen" key and either drag it on top of the video window, or click the APPLY button
Fine Tune the Bluescreen Effect
  1. Click on the small EDIT EFFECTS button in the bottom left of the Effects window
  2. The Bluescreen Threshold can be dragged up to around 90
  3. The Cutoff can be brought up to around 30
  4. Smoothing looks good in HIGH
  5. Click DONE

You can "scrub" the timeline slider through different parts of the movie to see how well the settings work. Nice, eh?

(Bluescreen with Computer Graphics is dead simple to get right - the computer generated blue background is always perfect.

It takes MUCH more work to use a "real life" Bluescreen in a studio
Apply a "Garbage Matte"
To hide the saucer behind the building at the start, we'll need to "Mask Off" an area of the CGI clipSaucerVideo26.gif
  1. Choose the "8-Point Garbage Matte" effect and APPLY it to the clip
  2. Click the small EDIT EFFECTS" button in the bottom left, and locate the "Garbage Matte" title bar. Click it start reshaping it.
  3. Drag the lower left handle up to the top right corner of the building you want the saucer to hide behind. you'll get the idea pretty quickly how this works. you may want to scrub to an appropriate part of the clip to see the effect
  4. Spread the top left, upper and lower right handles to the corners of the clip, and try to use the lower and left handles to line the appropriate walls of the building
  5. Right-Click the video window, and set magnification to 200% to fine tune the matting
  6. Zoom back out, but leave the effect edting screen open on the Garbage matte
Animate the Matte
At about 4 seconds in the timeline, the Saucer has emerged, and will soon travel in FRONT of the building it used to be hiding behind. To achieve this, we're going to have to make part of our matte move out of the way just after 4 seconds. This will be done with KEYFRAMES much like the way we used them in Anim8or
  1. In the Timeline, scrub to the point around 4 seconds where the saucer is clear of the building
  2. Click on the "Show Keyframes" button at the top right of the effects editor - it will expand the keyframes window
Be sure that you're at the 4 second mark
  1. Click the "Toggle Animation" button in the Garbage Matte title bar, and you'll generate a keyframe that "nails" the location of the Grabage Matte handles
Now Scrub ahead to a point JUST before the saucer starts to move toward the actors
  1. Grab the handle from the top corner of the building, and drag it back down to the bottom left of the screen. You should see a new Keyframe be created to the right of the first set of keyframes.
  2. Scrub to see the effect - the matte should move just in time to allow the saucer to travel in FRONT of the building that used to hide it

Click DONE to finish off the effects

There are other effects that can add to the believability of the CGI
  • Try Gaussian Blur at about 2 pixels
  • In Image Control, Reduce Contrast to about 85%, and increase brightness by about 5. Sometimes you have to "degrade" the quality of the CGI to match the imperfections of the background video
Render the final movie
There are dozens of possible video file formats that you can export to, but WMV seems to be one of the more compatible and compact formats if you're staying on a WIndows platform
  1. Click on the SHARE button at the top right of the screen
  2. Choose the PERSONAL COMPUTER option
  1. At the top of the next screen, scroll down and choose MPEG
  2. Click on PRESETS and select an appropriate Widescreen Preset you built earlier - if it hasn't been made yet, follow the VIDEO RENDER instructions on this wiki
  3. Name your file "Finished Saucer" and opt to save it in the D: Drive
  4. Click the SAVE button at the bottom right

Whew - That's it!
Although it seems like a lot to read through, it actually gets pretty easy after you've tried it once or twice.