Easy-to-follow video tutorials help you learn software, creative, and business skills.Become a member

Creating a garbage matte

From: Premiere Pro CS4 Beyond the Basics

Video: Creating a garbage matte

In this chapter, we're going to look at keying and compositing. Keying is the process of removing a green screen so you can isolate an object. So if we wanted to composite this bounced basketball in another scene and not in front of this green thing, then we would shoot it in front of a green screen and then remove the green screen and then we could adjust it later in post how we like it. Almost always, the first part of the process, when you're keying, is to create something called a Garbage Matte. If we do a search for the word Garbage in the Effects panel, we'll see there is actually several different effects for this, as you could see that there is an Eight-Point, a Four-Point, and a Sixteen-Point Garbage Matte.

Creating a garbage matte

In this chapter, we're going to look at keying and compositing. Keying is the process of removing a green screen so you can isolate an object. So if we wanted to composite this bounced basketball in another scene and not in front of this green thing, then we would shoot it in front of a green screen and then remove the green screen and then we could adjust it later in post how we like it. Almost always, the first part of the process, when you're keying, is to create something called a Garbage Matte. If we do a search for the word Garbage in the Effects panel, we'll see there is actually several different effects for this, as you could see that there is an Eight-Point, a Four-Point, and a Sixteen-Point Garbage Matte.

Now what you do with the Garbage Matte is you get rid of the junk that wound up in the scene. Invariably, when you're shooting green screen work, there is a boom stand or there is other technical stuff off in the distance because the green screen didn't quite fill the entire screen. In this case, there is a little bit of the floor and some tape, and so, we need to get rid of that before we key the footage. We get a much cleaner key by getting rid of that junk initially by creating a Garbage Matte. These effects are actually really cool for that. We'll start out by applying the Four- Point Garbage Matte and drag-and-drop that into our footage.

Then the best way to fiddle with these is to click on the effect to highlight it and then you'll get these control points and you can just click-and-drag to remove objects that you don't want. So we can click-and-drag, like this, to get rid of the bottom. Now this will be so much easier for our Keying tool to go in and look and just see the green to get rid of the green. It won't have to worry about processing all of this junk as well. Now we could also open up the effect and adjust these manually, so even though my Bottom Left effect point is off the screen, I could adjust that by fiddling with these controls here.

I want to hold the Shift key to move that a little bit more quickly, but you get the idea here. I'm just going to select this effect and delete that. As you can imagine, Eight-Point and Sixteen-Point are just the same exact thing, except with more points. Now be aware that you're going to get more smoothness with something like the Sixteen-Point Garbage Matte. If you are moving around a character, it might be a good idea to have more control like this. But oftentimes with a Garbage Matte, you have to animate it just in case something kind of moves out of frame.

So let's say, we had a person here and maybe we moved all of these points around the person, and then when the person moved their arm, we have to animate these points to encompass their entire frame. So it might be easier to do that with less points. For what it's worth, I typically find myself using the Eight-Point Garbage Matte most of all. I find Sixteen-Points to be too many and I find Four-Points to make things little bit too blocky, Eight-Point seems like the goldilocks, just rightness, where it's like right in the middle of the two.

Now just to be clear, before we close out this movie, with the Garbage Matte we're only trying to get rid of this extraneous junk here, we're not trying to remove the green screen. Although, if we know that the object, the subject that we're trying to key out is - never goes in a certain area of the frame, and there's nothing wrong with moving those garbage points there. So if we move this basketball in time, for example, we could see that it never really goes right here. So we could do this if we wanted to, to remove more of that green screen, actually, it does go right there, somewhere around there, where it just barely avoids the bounce so we could move this down a little bit, like that if we wanted to.

But you want to make sure with your Garbage Matte that it stays clear of the subject at all times, so this is a no-no, how it cuts off the subject. So we want to make sure that our subject is never cut off and all of the extra junk is. Then once you've created this initial Garbage Matte, you're ready to actually apply the Keying software, the Keying tool to remove the green screen.

Show transcript

This video is part of

Image for Premiere Pro CS4 Beyond the Basics
Premiere Pro CS4 Beyond the Basics

82 video lessons · 20110 viewers

Chad Perkins
Author

 
Expand all | Collapse all
  1. 4m 11s
    1. Welcome
      56s
    2. What's new in the dot release
      57s
    3. Using the exercise files
      2m 18s
  2. 18m 54s
    1. Capturing ambient audio
      3m 12s
    2. Getting plenty of coverage
      1m 48s
    3. Telling a story with camera angles
      3m 18s
    4. The 180 degree rule
      2m 13s
    5. Framing shots
      3m 25s
    6. Allowing "emotional space"
      1m 40s
    7. Overcranking and time lapse
      3m 18s
  3. 11m 38s
    1. Why is metadata important?
      1m 40s
    2. Browsing and adding metadata
      6m 4s
    3. Creating metadata with Speech Search
      3m 54s
  4. 33m 12s
    1. When to cut
      7m 38s
    2. Avoiding bad edits
      9m 17s
    3. Using emotional cutaways
      1m 53s
    4. Fixing problems with cutaways
      3m 53s
    5. Pacing edits
      3m 49s
    6. Matching action
      4m 14s
    7. The power of suggestive editing
      2m 28s
  5. 26m 31s
    1. Contrasting targeting and selecting
      3m 17s
    2. Copying and pasting clips
      2m 36s
    3. Replacing clips
      4m 8s
    4. Editing to music
      5m 0s
    5. Using sample rate for precise editing
      5m 34s
    6. Creating J and L cuts
      3m 33s
    7. Working with subclips
      2m 23s
  6. 11m 17s
    1. Ingesting media
      1m 39s
    2. Examining P2 file structure
      1m 31s
    3. Importing P2 files with the Media Browser
      5m 15s
    4. Converting DVCPRO HD to standard 720p
      2m 52s
  7. 38m 11s
    1. Using the Reference Monitor
      3m 0s
    2. Using scopes
      8m 33s
    3. Primary color correction
      10m 11s
    4. Secondary color correction
      8m 28s
    5. Creating a vignette
      2m 28s
    6. Creating a day-for-night shot
      5m 31s
  8. 37m 19s
    1. Censoring video
      5m 30s
    2. Creating a waving flag
      6m 5s
    3. Creating a lens flare
      3m 36s
    4. Creating background textures
      6m 19s
    5. Playing with time
      6m 4s
    6. Using transition effects
      6m 13s
    7. Working with presets
      3m 32s
  9. 15m 30s
    1. Creating a garbage matte
      3m 56s
    2. Removing green screen
      5m 6s
    3. Compositing with blend modes
      3m 32s
    4. Nesting sequences
      2m 56s
  10. 15m 27s
    1. Creating 3D reflections
      5m 0s
    2. Creating growing vines
      5m 52s
    3. Creating a track matte
      2m 39s
    4. Using the History panel
      1m 56s
  11. 42m 25s
    1. Censoring audio using bleeps
      5m 16s
    2. Understanding sample rate
      3m 0s
    3. Normalizing audio across multiple clips
      5m 7s
    4. Recording audio
      2m 24s
    5. Removing audio problems with Soundbooth
      5m 43s
    6. Working with VST plug-in effects
      2m 3s
    7. Mixing audio
      8m 20s
    8. Changing volume over time
      5m 22s
    9. Working with surround sound
      5m 10s
  12. 23m 52s
    1. About this project
      2m 26s
    2. Performing preliminary edits
      2m 35s
    3. Working with multi-camera footage
      7m 27s
    4. Creating a visual "stutter"
      3m 12s
    5. Adjusting color
      8m 12s
  13. 6m 28s
    1. Transferring projects to another machine
      3m 24s
    2. Removing unused footage
      3m 4s
  14. 25m 46s
    1. Choosing a format
      5m 35s
    2. Understanding spatial compression
      2m 5s
    3. Understanding temporal compression
      4m 19s
    4. About HD standards
      5m 46s
    5. Changing footage interpretation
      2m 17s
    6. Getting the film look
      5m 44s
  15. 27m 10s
    1. Working with After Effects
      5m 56s
    2. Creating titles in After Effects
      5m 39s
    3. Working with Photoshop files
      2m 29s
    4. Working with Final Cut Pro
      2m 2s
    5. Working with OnLocation
      3m 12s
    6. Working with Encore
      4m 27s
    7. Introducing Adobe Story for pre-production
      3m 25s
  16. 15s
    1. Goodbye
      15s

Start learning today

Get unlimited access to all courses for just $25/month.

Become a member
Sometimes @lynda teaches me how to use a program and sometimes Lynda.com changes my life forever. @JosefShutter
@lynda lynda.com is an absolute life saver when it comes to learning todays software. Definitely recommend it! #higherlearning @Michael_Caraway
@lynda The best thing online! Your database of courses is great! To the mark and very helpful. Thanks! @ru22more
Got to create something yesterday I never thought I could do. #thanks @lynda @Ngventurella
I really do love @lynda as a learning platform. Never stop learning and developing, it’s probably our greatest gift as a species! @soundslikedavid
@lynda just subscribed to lynda.com all I can say its brilliant join now trust me @ButchSamurai
@lynda is an awesome resource. The membership is priceless if you take advantage of it. @diabetic_techie
One of the best decision I made this year. Buy a 1yr subscription to @lynda @cybercaptive
guys lynda.com (@lynda) is the best. So far I’ve learned Java, principles of OO programming, and now learning about MS project @lucasmitchell
Signed back up to @lynda dot com. I’ve missed it!! Proper geeking out right now! #timetolearn #geek @JayGodbold
Share a link to this course

What are exercise files?

Exercise files are the same files the author uses in the course. Save time by downloading the author's files instead of setting up your own files, and learn by following along with the instructor.

Can I take this course without the exercise files?

Yes! If you decide you would like the exercise files later, you can upgrade to a premium account any time.

Become a member Download sample files See plans and pricing

Please wait... please wait ...
Upgrade to get access to exercise files.

Exercise files video

How to use exercise files.

Learn by watching, listening, and doing, Exercise files are the same files the author uses in the course, so you can download them and follow along Premium memberships include access to all exercise files in the library.


Exercise files

Exercise files video

How to use exercise files.

For additional information on downloading and using exercise files, watch our instructional video or read the instructions in the FAQ.

This course includes free exercise files, so you can practice while you watch the course. To access all the exercise files in our library, become a Premium Member.

Join now "Already a member? Log in

Are you sure you want to mark all the videos in this course as unwatched?

This will not affect your course history, your reports, or your certificates of completion for this course.


Mark all as unwatched Cancel

Congratulations

You have completed Premiere Pro CS4 Beyond the Basics.

Return to your organization's learning portal to continue training, or close this page.


OK
Become a member to add this course to a playlist

Join today and get unlimited access to the entire library of video courses—and create as many playlists as you like.

Get started

Already a member?

Become a member to like this course.

Join today and get unlimited access to the entire library of video courses.

Get started

Already a member?

Exercise files

Learn by watching, listening, and doing! Exercise files are the same files the author uses in the course, so you can download them and follow along. Exercise files are available with all Premium memberships. Learn more

Get started

Already a Premium member?

Exercise files video

How to use exercise files.

Ask a question

Thanks for contacting us.
You’ll hear from our Customer Service team within 24 hours.

Please enter the text shown below:

The classic layout automatically defaults to the latest Flash Player.

To choose a different player, hold the cursor over your name at the top right of any lynda.com page and choose Site preferencesfrom the dropdown menu.

Continue to classic layout Stay on new layout
Exercise files

Access exercise files from a button right under the course name.

Mark videos as unwatched

Remove icons showing you already watched videos if you want to start over.

Control your viewing experience

Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.

Interactive transcripts

Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.

Are you sure you want to delete this note?

No

Your file was successfully uploaded.

Thanks for signing up.

We’ll send you a confirmation email shortly.


Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

Keep up with news, tips, and latest courses with emails from lynda.com.

Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

   
submit Lightbox submit clicked
Terms and conditions of use

We've updated our terms and conditions (now called terms of service).Go
Review and accept our updated terms of service.