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What is transcoding?


From:

Encore CS5 Essential Training

with Chad Perkins

Video: What is transcoding?

Video comes in all shapes and sizes, tons of different formats, tons of different ways to compress different files. But when the specifications for DVDs and Blu-ray discs were made, there were certain rules that DVDs only understand a certain type of compression, and that is MPEG-2 compression, and Blu-ray Discs understand MPEG-2 and H264, also called H.264, but those are the only means of compression that those file types, or those disc types will allow.
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  1. 4m 43s
    1. Welcome
      57s
    2. What is Encore?
      1m 33s
    3. Using the exercise files
      1m 15s
    4. Reconnecting unlinked media
      58s
  2. 16m 10s
    1. Project overview
      1m 12s
    2. Importing content
      1m 55s
    3. Using included content
      2m 2s
    4. Adding a menu to a project
      2m 42s
    5. What are timelines?
      2m 3s
    6. Creating links and navigation
      3m 13s
    7. Exporting
      3m 3s
  3. 21m 28s
    1. Understanding disc formats
      3m 7s
    2. About television standards
      1m 40s
    3. What is transcoding?
      4m 47s
    4. Exporting video for Encore
      2m 39s
    5. Bits vs. bytes
      2m 3s
    6. The importance of bit budgeting
      1m 46s
    7. About pixel aspect ratios
      2m 52s
    8. About overscan and safe areas
      2m 34s
  4. 13m 5s
    1. Creating a new project
      2m 57s
    2. Touring the interface
      4m 44s
    3. Importing assets as Encore objects
      1m 35s
    4. Using the Project panel
      3m 49s
  5. 16m 47s
    1. Understanding menus
      40s
    2. Creating menus with the Library panel
      4m 37s
    3. Editing menus
      3m 41s
    4. The Menu Viewer vs. the Menus panel
      1m 20s
    5. Creating motion menus
      4m 16s
    6. About submenus
      2m 13s
  6. 20m 34s
    1. The anatomy of a button
      3m 42s
    2. Creating buttons
      1m 55s
    3. Editing buttons
      1m 24s
    4. Viewing and adjusting button routing
      3m 27s
    5. Creating video buttons
      3m 19s
    6. Understanding subpicture states
      1m 45s
    7. Changing subpicture colors
      5m 2s
  7. 13m 35s
    1. Using the Monitor
      55s
    2. Creating chapter markers
      3m 18s
    3. Setting poster frames
      3m 38s
    4. Creating chapter points automatically
      1m 47s
    5. Editing video in the timeline
      2m 35s
    6. The Timeline Viewer vs. the Timeline panel
      1m 22s
  8. 8m 9s
    1. Creating navigation with the Flowchart
      2m 45s
    2. Setting a "first play" object
      1m 12s
    3. Auto-selecting button names from links
      1m 20s
    4. Creating user permissions for a disc
      2m 52s
  9. 11m 13s
    1. Creating and adjusting text
      4m 5s
    2. Applying styles
      2m 27s
    3. Automatically arranging objects
      1m 8s
    4. Transforming objects
      3m 33s
  10. 17m 30s
    1. Introducing slideshows
      4m 45s
    2. Adjusting slideshow properties
      3m 26s
    3. Adding motion and transitions
      4m 26s
    4. Syncing slideshows to audio
      3m 20s
    5. Slideshows and bit budgeting
      1m 33s
  11. 6m 43s
    1. What is a playlist?
      3m 45s
    2. Using chapter playlists
      2m 58s
  12. 17m 25s
    1. Using audio in Encore
      1m 47s
    2. Adding audio to a menu
      1m 1s
    3. Allowing users to change languages
      6m 27s
    4. Creating subtitles
      2m 8s
    5. Importing and exporting subtitles
      2m 47s
    6. Changing subtitle color
      3m 15s
  13. 17m 28s
    1. The power of end action overrides
      2m 52s
    2. Using replacement layers
      2m 4s
    3. Looping motion menus
      3m 7s
    4. Replacing a menu
      1m 54s
    5. Creating a chapter index
      2m 32s
    6. Using photos as subpictures
      4m 59s
  14. 12m 41s
    1. Creating "Easter eggs"
      2m 13s
    2. Making games
      2m 13s
    3. Using menu transitions
      1m 49s
    4. Using subpictures as art
      3m 22s
    5. Creating a video menu
      3m 4s
  15. 5m 17s
    1. Why use Encore as a presentation tool?
      37s
    2. Creating slideshows with manual advance
      1m 35s
    3. Creating captions on slides
      1m 29s
    4. Adding data content to discs
      1m 36s
  16. 11m 37s
    1. Making menus in Photoshop
      1m 42s
    2. The button set codes
      1m 41s
    3. The subpicture highlight codes
      1m 18s
    4. The replacement layer code
      2m 34s
    5. The video button code
      1m 42s
    6. The submenu navigation codes
      1m 38s
    7. Using pre-built menus as templates
      1m 2s
  17. 7m 33s
    1. Introducing Blu-ray discs
      2m 55s
    2. Creating Blu-ray pop-up menus
      2m 59s
    3. Previewing pop-up menus over a timeline
      1m 39s
  18. 11m 5s
    1. Encore's automatic letterbox
      2m 27s
    2. Checking your project for errors
      2m 18s
    3. Outputting to disc
      2m 40s
    4. Creating Flash web sites
      3m 40s
  19. 5m 36s
    1. Duplication vs. replication
      2m 8s
    2. About copy protection
      1m 6s
    3. About region encoding
      1m 9s
    4. Fixing the audio_TS problem
      1m 13s
  20. 4m 54s
    1. Importing sequences from Premiere Pro
      1m 42s
    2. Creating motion menus in After Effects
      1m 49s
    3. Making buttons and subpictures in After Effects
      1m 23s
  21. 24s
    1. Goodbye
      24s

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Watch the Online Video Course Encore CS5 Essential Training
4h 3m Beginner Apr 30, 2010

Viewers: in countries Watching now:

In Encore CS5 Essential Training, author Chad Perkins gives an extensive overview of Encore CS5, Adobe's powerful application for authoring DVDs, Blu-ray Discs, and Flash-based video for the web. This course covers adding audio and subtitle tracks, creating image slideshows, and using Encore as a presentation tool. Also explained are the Blu-ray enhancements in CS5, and advanced techniques such as creating games and hidden content for disc menus. Exercise files are included with the course.

Topics include:
  • Understanding television standards, transcoding, and pixel aspect ratios
  • Building multipage menus
  • Creating motion menus
  • Adding and linking buttons in menus
  • Inserting chapter markers
  • Defining user permissions for a disc
  • Adding text
  • Using audio in Encore
  • Looping menus
  • Transitioning between menus
  • Outputting to the web with Flash
  • Integrating with Premiere Pro and After Effects
Subject:
Video
Software:
Encore
Author:
Chad Perkins

What is transcoding?

Video comes in all shapes and sizes, tons of different formats, tons of different ways to compress different files. But when the specifications for DVDs and Blu-ray discs were made, there were certain rules that DVDs only understand a certain type of compression, and that is MPEG-2 compression, and Blu-ray Discs understand MPEG-2 and H264, also called H.264, but those are the only means of compression that those file types, or those disc types will allow.

So whatever video you bring in, it will probably have to be changed into MPEG-2 or H264. In other words, it will need to be encoded, or an Encore speak, it'll need to be transcoded. Now in the Project panel here, if we resize this by putting our cursor at the vertical divider between this and the panel to its right, just stretch this out here, we can see that we have DVD Transcode Status and also DVD Transcode Settings. So right now, this file that I've just imported is un-transcoded, so it needs to be transcoded to DVD compliable or compliant video, before it can burn our DVD.

And this process takes a long a time, a very long time. That's one of the biggest e-mails I get about Encore is, 'Is it broken? It's been taking hours and hours,' and yes, if you have a full-length movie, depending on the power of your system, it could take many hours to transcode video. This is normal. So what you can do is you could right- click on a video clip, in your Project panel, that you've imported, and choose Transcode Now. So Encore will allow you to have a footage being transcoded while you are assembling your project in Encore.

If your computer is tough enough to handle you transcoding in the background while you're assembling your project, this could save you a lot of time in the end. Now let's talk about Transcode Settings. When you right-click on a clip, you could also choose Transcode Settings, so go ahead and choose that option. You get the Transcode Settings Dialog box here, and we can choose transcoding for DVD and for Blu-rays. Since this is an HD clip, 1280x720, we have the option to transcode for both DVD or Blu-ray. Now, by default, the Quality Preset for DVD Footage, if you're going to be transcoding DVD Footage, is automatic.

That means it's going to make it as high of a quality as it possibly can. This clip is only 19 seconds long, so we know that we could fit in hour and a half of really high-quality video on a DVD, so if it's only 19 seconds long, it's going to be an extremely high quality. But if we brought in another hour and a half worth of footage, it might have to start compressing all of the extra files that we're bringing in order make space. So that's what the automatic Quality Preset means. Now we might have one piece of footage that is just absolutely amazing, and it needs to be very high-quality.

So we could choose one of these High Quality Presets here. Now this 7Mb, 8Mb, this refers to megabits. This is the Data Rate of the Preset here. We'll talk a little more about this when we get into bits versus bytes, that can be a little confusing, but it's good to know about CBR versus VBR. CBR stands for Constant Bit Rate. That means you're going to get the same constant bit rate, and it's going to go faster when it encodes, so it's not going to take you as long. But the VBR means Variable Bit Rate. What that's going to do is actually be a little bit more intelligent and examine your footage.

It's going to kind of look through it and see where there's patches where it might be able to compress things little bit more and get away with it and thereby give you higher quality, when there's action scenes, or something like that, but this does take a lot longer, because it has to go through two passes. That's what this means here. It has to go through two passes of your footage to know what it can compress or not. So it takes a lot longer to encode, but if you could deal with it, then you're going to have a much higher-quality result, and you're going to be able to fit more onto a disc. Now honestly, once you're in the 7-8 Mb range, I can't tell the difference, honestly, between these.

This is pretty high megabit stuff, but when you get down to like 4 Mb or lower, especially when you are dealing with CBR, you can start to tell. If you're going down to something like 3 Mb, it's going to be very obvious. You don't want to do that. So you don't want to cram too much on a DVD. I mean, you can, and Encore will force itself to continually go lower and lower on quality, the more stuff you try to jam-pack into a DVD, but you don't want to do that. So let's say, for example, I want to do the VBR. I could click on this, and go ahead and click OK here, and I could right-click and choose Transcode Now on this clip, and I can have it transcoding in the background, so again, when it's time to burn this to DVD, I don't have to waste time transcoding this asset, which could take a very long time.

Find answers to the most frequently asked questions about Encore CS5 Essential Training .


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Q: On my version of Encore, I have the dropdown menu to select templates for making buttons and making a menu for my videos. Unfortunately, the menu only shows the General choices. I don’t have the weddings, cartoons, etc., templates available that are supposed to come with Encore. Why is this, and where can I get these templates?
A: In order to get the extra Encore templates, you'll need to get them from the discs that come with Encore, or the additional download where you downloaded Encore. Adobe makes this a separate download/installation because the files are very large (several GB).
 
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