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Automatically detecting musical beats


From:

Premiere Elements 4 Essential Training

with Chad Perkins

Video: Automatically detecting musical beats

In this movie, we're going to be talking about a really cool feature in Premiere Elements called Detect Beats. If you like to follow along I'm using the project called Beat Detect in the Chapter 7 folder. Basically I have this cool audio clip called Totally 80s Groovathon. This little loop-based clip that I made in Apple's GarageBand here, so I'm going to drag this down and add this to my project, on either the narration or the soundtrack, track doesn't really matter. Let's just play this back to here what's going on here.
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  1. 11m 15s
    1. Welcome
      2m 23s
    2. What is Premiere Elements?
      2m 28s
    3. Why use Premiere Elements?
      1m 58s
    4. How to use the exercise files
      2m 40s
    5. About the video in this course
      1m 46s
  2. 33m 50s
    1. The basic Premiere Elements workflow
      5m 5s
    2. Importing video footage
      4m 13s
    3. Working with clips
      4m 19s
    4. Editing a movie
      2m 12s
    5. Adding transitions and effects
      5m 21s
    6. Adding a soundtrack
      3m 11s
    7. Applying a Movie Theme
      3m 54s
    8. Adding a title
      3m 23s
    9. Sharing the final movie
      2m 12s
  3. 37m 30s
    1. Tips for installing Premiere Elements
      1m 43s
    2. About the Welcome screen
      1m 32s
    3. Tips for creating new projects
      2m 40s
    4. Getting familiar with the interface
      5m 8s
    5. Getting video from camera to computer
      4m 26s
    6. Capturing stop motion footage
      2m 10s
    7. Importing media
      4m 36s
    8. Opening vs. importing
      1m 59s
    9. Using the Organizer
      3m 18s
    10. Working with the Project view
      3m 39s
    11. Finding missing footage
      2m 55s
    12. Fixing mistakes
      1m 43s
    13. Using the Help options
      1m 41s
  4. 53m 48s
    1. Introduction to editing video
      2m 21s
    2. When should we cut?
      2m 13s
    3. About the Sceneline and the Timeline
      1m 41s
    4. Navigating in time
      7m 33s
    5. Trimming video in the Sceneline
      4m 8s
    6. Trimming video in the Timeline
      1m 4s
    7. Splitting a clip
      3m 40s
    8. Rearranging the order of clips
      3m 13s
    9. Previewing a video
      1m 50s
    10. Making slow motion and fast motion clips
      4m 15s
    11. Playing a clip backward
      1m 7s
    12. Freezing a frame of video
      3m 6s
    13. Creating a temporary pause
      3m 1s
    14. Moving and transforming clips
      8m 10s
    15. Using markers to work faster
      6m 26s
  5. 18m 6s
    1. What are transitions?
      2m 31s
    2. Basic transitions
      6m 16s
    3. Customizing transitions
      4m 41s
    4. “One-sided” transitions
      2m 43s
    5. Important rules about transitions
      1m 55s
  6. 38m 31s
    1. What are effects?
      4m 4s
    2. Adjusting brightness and color
      7m 4s
    3. Chad's favorite effects
      8m 22s
    4. Giving clips an “old film” look
      2m 45s
    5. Stabilizing footage
      4m 28s
    6. Customizing effects settings
      5m 27s
    7. Making lightning shoot from your hand
      6m 21s
  7. 32m 26s
    1. The importance of audio
      2m 9s
    2. Working with audio
      4m 1s
    3. Mixing audio tracks
      5m 9s
    4. Automatically detecting musical beats
      4m 54s
    5. Unlinking audio and video
      5m 17s
    6. Using a consistent audio source
      3m 41s
    7. Recording narration
      1m 37s
    8. Applying audio effects
      5m 38s
  8. 18m 57s
    1. Understanding animation concepts
      2m 23s
    2. Creating keyframes for fixed effects
      8m 2s
    3. Animating effects
      4m 38s
    4. Fine-tuning animations
      3m 54s
  9. 28m 51s
    1. Using the titling tools
      10m 46s
    2. Animating credits
      6m 3s
    3. Creating titles using templates
      2m 56s
    4. Using the included free content
      3m 55s
    5. Making a slide show
      5m 11s
  10. 12m 5s
    1. What are Movie Themes?
      4m 33s
    2. Applying Movie Themes
      5m 25s
    3. Customizing Movie Themes
      2m 7s
  11. 20m 37s
    1. Adding DVD chapter markers
      5m 25s
    2. Creating DVD menus
      5m 10s
    3. Exporting to DVD and Blu-ray
      3m 13s
    4. Exporting to YouTube
      2m 7s
    5. Exporting to iPhones, iPods, Zunes, cell phones, and other devices
      2m 13s
    6. Exporting to a file on your computer
      2m 29s
  12. 11m 39s
    1. Tips for shooting good video
      2m 52s
    2. Getting a second hard drive
      1m 31s
    3. What camera should you buy?
      1m 46s
    4. Different types of camera storage
      3m 22s
    5. Optical vs. digital zoom
      2m 8s
  13. 49m 52s
    1. About the final project
      1m 53s
    2. Importing and setting up the project
      2m 15s
    3. Arranging the clips
      3m 1s
    4. Adding audio and markers
      3m 59s
    5. Intermediate video editing
      13m 4s
    6. Creating transitions and overlays
      7m 24s
    7. Changing colors with effects
      5m 50s
    8. Applying a Movie Theme
      6m 27s
    9. Personalizing the titles
      2m 44s
    10. Exporting and posting to YouTube
      3m 15s
  14. 1m 48s
    1. Goodbye
      1m 48s

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Watch the Online Video Course Premiere Elements 4 Essential Training
6h 9m Beginner Apr 25, 2008

Viewers: in countries Watching now:

Digital video is a medium that is now available to almost everyone. It can be captured on anything from a mobile phone to a high-definition camera, and published anywhere from YouTube to Blu-ray discs. In Premiere Elements 4 Essential Training, Adobe Certified Instructor Chad Perkins explores all the video editing capabilities of Premiere Elements 4. Chad starts with a real-world sample project, then covers techniques for importing and editing video; and adding effects, transitions, and animation. He concludes with a final project incorporating all the steps, including exporting and posting. Exercise files accompany the course.

Topics include:
  • Purchasing a video camera and shooting video Capturing and importing video and audio Editing video in the simplified (Sceneline) and traditional (Timeline) interfaces Making titles and slideshows Mixing audio tracks, recording narration, and applying audio effects Creating animation and applying special effects Sharing videos on YouTube, DVDs, Blu-ray discs, and iPods
Subject:
Video
Software:
Premiere Elements Elements
Author:
Chad Perkins

Automatically detecting musical beats

In this movie, we're going to be talking about a really cool feature in Premiere Elements called Detect Beats. If you like to follow along I'm using the project called Beat Detect in the Chapter 7 folder. Basically I have this cool audio clip called Totally 80s Groovathon. This little loop-based clip that I made in Apple's GarageBand here, so I'm going to drag this down and add this to my project, on either the narration or the soundtrack, track doesn't really matter. Let's just play this back to here what's going on here.

(Electronic music plays.) Oh man, that is a dance party right there. That's awesome! Now this track is really driven by the rhythm, and let's say I wanted to sink up some video clips to the changes of the beats. To be pretty hard right now because I have no idea where those beats are. As I scrub this I can't tell anything about this clip. So what we can do is we could have Premiere Elements automatically detect where these beats should be so that we could sink up our audio to the beats of the song.

Now this could be done in either the Sceneline or the Timeline as you see Detect Beats here, but markers don't show up in the Timeline. This Detect Beats feature actually adds Timeline Markers which we can't really see in the Sceneline. So we're going to go to the Timeline here in order to see them although you can't detect beats in either view. So with this clip selected I'm going to click on Detect Beats. Now these settings are a little bit complex. We could really get in there and be very precise about the type of beats that this is detecting, like how hard they are or how soft they are, how often they are and we could really restrict which beats of the song are getting detected.

So if you have like a rave song for example or a disco song it's very percussion heavy, you might not want a marker like every single second but a lot of that music that's very pounding would create markers very often which you may or may not want. Let's say for example, this top setting here. Minimum time between beats, the default setting is two seconds. For crying out loud, my grandparents don't listen the songs with beats that are two whole seconds apart. So I want to drag this down so that these beats can be closer together.

Let's try and see what this looks like with 0.4. Again with the default settings of 0.2 every single marker is going to be at least two seconds apart, so that's not going to help us too much. So if I click OK now, it takes just a quick second but as I go through here and I play this and watching the play head go through the Current Time Indicator, go through this Timeline we will see that these little markers kind of match up to some of the beats here in the song. (Electronic music plays.) Very cool! Now we could use these markers as visual guides as far as where to put our clips when we're assembling our edits.

Now I found that with this feature you've got to kind of fiddle with it a little bit. There is no one setting that always works and you definitely don't get the results that you're looking for right off the bat. It's an amazing feature in theory but not always in practice. The good news is, is that if you want to Undo this and have it Detect Beats with different settings you could just hit Ctrl+Z to get rid of all those Timeline Markers and start allover again. So let's click Detect Beats again and let's take this down even farther. So there is only a tenth of a second in between each beat.

And if we increase the difference, then we're not going to get as many markers because the beats will have to be even more pronounced for Premiere Elements to go in and create a marker. As we reduce to different setting then it will make even more subtle beats have markers. So if your song maybe has hi-hats and a base and snare you might get markers for every single hit of every single hi-hat and base and snare. We only want the best though, we only want the base and the snare. So I'm going to take up difference and take down minimum time between beats a little bit more and hit OK and see if we come up with here.

So now let's hit the Home key and preview what this looks like. (Electronic music plays.) So it looks like we're getting some of the keyboard as well. So only where there are real tight accents not just base and snare but just real tight accents of them are we getting these markers. So you can see where the melody changes right here visually to the dan... dan... uh... da... da... uh... da... da... na... well, you know I don't have the hum it for you, but you're seeing these groups of two markers right there signifying that particular change.

So if you're going to sink up again your video to those little beats this would be so incredibly difficult without this feature. In the next movie, we're going to talk about the linkage between audio and video a little bit deeper. Specifically we're going to talk about how to get rid of audio attached to video or to unlink them so that you can shuffle them around. That's coming up next.

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