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Flash CS3 Professional Beyond the Basics
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Using transparency in a video


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Flash CS3 Professional Beyond the Basics

with Todd Perkins

Video: Using transparency in a video

In this chapter we'll be working with video and talk about some advanced video principles. We'll start by talking about how to bring in video with an alpha channel into Flash. An alpha channel is a transparent part of the video. For example sometimes video is filmed with a green background and then that background is removed from the video digitally, so that the background is then transparent. Now we can work with that in Flash and that's what we'll talk about how to do in this movie. If you're following along, I'm working in 01_Transparency.fla in the Chapter 08 folder in the Exercise Files folder. This is actually just a blank document.
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  1. 3m 30s
    1. Welcome
      1m 20s
    2. Getting the most from this training
      1m 20s
    3. Using the exercise files
      50s
  2. 15m 28s
    1. Managing digital assets
      4m 9s
    2. Creating custom keyboard shortcuts
      5m 1s
    3. Creating custom color swatches
      3m 41s
    4. Creating a custom template
      2m 37s
  3. 14m 38s
    1. Working with variables
      3m 41s
    2. Using functions
      3m 30s
    3. Working with events
      2m 11s
    4. Using event listeners
      2m 42s
    5. Working with arrays
      2m 34s
  4. 29m 41s
    1. Understanding dynamic text fields
      2m 37s
    2. Loading text from an external file
      6m 42s
    3. Reading HTML from a text field
      5m 29s
    4. Applying CSS with ActionScript
      7m 0s
    5. Applying external CSS to a text field
      7m 53s
  5. 45m 27s
    1. Masking dynamic text
      4m 59s
    2. Dragging the Scroll Bar
      7m 3s
    3. Calculating a scroll percent
      5m 20s
    4. Setting scroll boundaries
      4m 9s
    5. Connecting the ScrollBar to the text field
      2m 55s
    6. Easing the text with the ScrollBar
      4m 12s
    7. Scrolling the text with buttons
      2m 38s
    8. Animating the scrolling text with the buttons
      4m 26s
    9. Setting boundaries for the scrolling text
      4m 26s
    10. Easing the text using the buttons
      1m 37s
    11. Connecting the ScrollBar to the Scroll buttons
      3m 42s
  6. 20m 46s
    1. Organizing a complex object into layers
      1m 51s
    2. Duplicating MovieClips
      1m 29s
    3. Undocking the timeline
      1m 20s
    4. Animating a complex MovieClip
      4m 36s
    5. Creating an animated Hinge effect
      5m 13s
    6. Creating complex animations
      6m 17s
  7. 28m 1s
    1. Controlling objects with buttons
      4m 6s
    2. Understanding frame labels
      3m 25s
    3. Using buttons to navigate labeled frames
      2m 30s
    4. Nesting code within MovieClips
      5m 8s
    5. Adding sound to the application
      2m 34s
    6. Adding drag interactivity to the robot
      6m 1s
    7. Animating the dragged robot
      4m 17s
  8. 20m 3s
    1. Understanding components
      2m 30s
    2. Using components to setup a form
      3m 45s
    3. Setting up the form to send an email
      3m 38s
    4. Working with form variables
      6m 11s
    5. Skinning components
      3m 59s
  9. 27m 40s
    1. Using transparency in a video
      4m 16s
    2. Working with embedded video
      3m 38s
    3. Animating a VideoClip
      2m 53s
    4. Creating an advanced animation with video
      2m 40s
    5. Working with the bitmap data class
      3m 37s
    6. Working with the bitmap class
      1m 40s
    7. Copying the video to create a reflection
      1m 35s
    8. Reflecting the video
      2m 42s
    9. Enhancing a video reflection with a mask
      4m 39s
  10. 1h 38m
    1. Viewing the finished MP3 player
      1m 45s
    2. Understanding the project flow
      2m 52s
    3. Preparing to build the MP3 player
      5m 11s
    4. Understanding classes and packages
      5m 32s
    5. Creating the MP3 player class
      9m 59s
    6. Loading sounds from external files
      9m 20s
    7. Accessing ID3 tag information
      6m 11s
    8. Controlling sound playback with Play and Pause buttons
      11m 3s
    9. Changing tracks
      12m 1s
    10. Displaying the current volume
      9m 33s
    11. Changing the volume
      6m 40s
    12. Wiring the progress bar
      8m 4s
    13. Building the progress bar slider
      10m 4s
  11. 5m 36s
    1. Making Flash movies accessible
      1m 49s
    2. Adding a name and description to your Flash movie
      52s
    3. Accessibility and text fields
      2m 55s
  12. 12m 2s
    1. Understanding Flash Mobile
      35s
    2. Exploring Device Central
      1m 45s
    3. Updating Device Profiles
      1m 7s
    4. Creating a Flash file from Device Central
      2m 7s
    5. Creating and testing Flash Lite applications
      2m 48s
    6. Downloading the Flash Lite player for Windows Mobile
      1m 44s
    7. Getting a Flash Lite application onto your phone
      1m 56s
  13. 27s
    1. Goodbye
      27s

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Flash CS3 Professional Beyond the Basics
5h 21m Intermediate Dec 06, 2007

Viewers: in countries Watching now:

Through several hands-on tutorials, instructor Todd Perkins shows how to best build dynamic, streamlined sites using Flash CS3 Professional. Learn how to create custom keyboard shortcuts, apply advanced text techniques such as animating scrolling text with custom easing controls, and using advanced animation techniques. Flash CS3 Professional Beyond the Basics covers many challenging features, including adding complex interactivity to a Flash CS3 project and getting Flash content on a phone. Exercise files accompany the tutorials.

Topics include:
  • Customizing Flash CS3 and managing assets Working with ActionScript variables Understanding dynamic text fields Adding interactivity to dynamic text Animating a complex MovieClip Using buttons to navigate labeled frames Working with components Exploring advanced audio and video techniques Creating accessible Flash content Understanding Flash Mobile
Subject:
Web
Software:
Flash Professional
Author:
Todd Perkins

Using transparency in a video

In this chapter we'll be working with video and talk about some advanced video principles. We'll start by talking about how to bring in video with an alpha channel into Flash. An alpha channel is a transparent part of the video. For example sometimes video is filmed with a green background and then that background is removed from the video digitally, so that the background is then transparent. Now we can work with that in Flash and that's what we'll talk about how to do in this movie. If you're following along, I'm working in 01_Transparency.fla in the Chapter 08 folder in the Exercise Files folder. This is actually just a blank document.

Let's choose File, Import, Import Video to import a video file. The video is going to be on the computer, so click the Choose button to select a file in the computer. And the file that we're going to choose is in the Exercise Files folder in Chapter 08, and it's called Paavo_unicycle.mov. Select that file then click Open. Now this file already has an alpha channel encoded. If you're following along and don't have access to the Exercise Files but have access to a video with an alpha channel encoded, then choose that video here.

If you don't have access to an alpha encoded video, follow along and take a look at the steps that you would take to add transparency to your video in Flash. So let's click the Continue button to go forward. For the video deployment type, I'm going to choose Embed video in SWF and play in timeline. Now when I choose that option notice that there's a big warning on the right side of the Import Video window. It says that Embedded deployment is likely to cause audio synchronization issues. So I'm choosing this option knowing that this video has no audio. And Flash tells us that this option is only recommended for short video clips with no audio track.

Another disadvantage to embedding video is that it substantially increases SWF file size as Flash is telling us here. But the advantage that we have to embedding video in the timeline is that we can sync our video with other elements on the stage. So embedding video is great if you need to sync parts of your video with graphics on the stage, and the video is very small in file size and has no audio track or at least the audio track does not need to be synced with the video. So let's click Continue. For the Symbol type I'm going to choose Movie clip to put the video inside of a movie clip.

I'm making sure the Place instance on stage option is checked, as well as the Expand timeline if needed option. I'm also choosing to Embed the entire video. I'm going to click the Continue button to continue and as I click and drag to preview a video, You can see that it's a little bit less than two seconds long, and notice the transparency behind the video. In other words, we can see the background of the Import Video window. In order to have transparency in the video in Flash, we need to click the Video button and check the Encode alpha channel option.

That's what adds transparency to our video. Now again this won't add transparency to a video if you just have a green screen in the background. You actually have to add an alpha channel to your video or a transparent area of your video in a video editing program. So this is something you cannot simply do in Flash. You actually need to have video that has an alpha channel already. So with that option checked I'm going to click the Crop and Resize button. Then I'm going to check the Resize video option at the bottom and in the center of Import Video window. And I'm going to leave that Maintain aspect ratio checked.

I'm going to change the width to 220 pixels. So I'm going to resize this video. With that option I'm going to click the Continue button. Flash then gives me a summary of what it's going to do for the video, and then I click the Finish button to encode the video. And if you don't see your video on the stage after the Encode Video window closes, you can click away or move your mouse and you'll see the video on the stage. And so there's the video on the stage. When I select it with a transparent background, you to see that it's inside of a movie clip with an Instance Name of Paavo_unicycle.mov, which is the same name of our file that we imported.

Let's test the movie to see what it looks like in Flash. Command+Return on the Mac, Ctrl+Enter on the PC. And you can see him on his unicycle. I'll close that window. And there's a look at taking video with an alpha channel into Flash and applying its transparency.

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