Alpha Channels

May 18, 2009 | 3 min 16 sec

Hi, I am Elise from BEEDOCS, and I would like to show you a new feature published this month as part of a free software update. You can now create timeline presentations with a clear background, which means you can layer photos or movies behind your timeline presentation.

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Transcript:

Alpha Channels: Transparent Backgrounds

Hi, I’m Elise from BEEDOCS, and I’d like to show you a new feature published this month as part of a free software update.

It’s now possible for you to create timeline presentations with a clear background, which means you can layer photos or movies behind your timeline presentation.

This feature was designed based of feedback from professional customers who are probably using software like Final Cut Pro to integrate timeline into their project, but even if you aren’t a Hollywood film editor you can try out this feature using Apple’s Keynote software.

And here’s how:

This is a timeline that I created to tell the story of California’s water wars at the turn of the century. I am going to export my timeline as a QuickTime movie by clicking the QuickTime button in the toolbar. To export a movie with a transparent background, click the “Include Alpha Channel” checkbox.

Do you see that the video compressor changed to “Animation?” Animation is a very high quality compressor and is the only compressor that has the ability to include transparency. However, you should be aware that it creates huge file sizes.

I will go ahead and export my timeline with the Alpha Channel box checked.

I am going to drag the timeline movie I just exported into Keynote. Watch what happens if I change Keynotes theme. See how the backgrounds are visible behind the timeline?

In order to use your own photograph as a background, drag the photo onto the Keynote slide with your timeline movie and choose “Send to Back” from the “Arrange” menu so that your photo is behind your timeline movie.

Adding a movie to your timeline works the same way. Drag the background movie onto your slide and then arrange it behind the timeline movie.

Once you have your slide arranged the way you’d like, you can present it using Keynote if your computer is fast enough to layer videos on the fly. You can also export your Keynote presentation as a video which will render the results out to a smaller file that is easier for your computer to play without skipping. That is what I did here.

We’re really excited to put this feature in your hands, and it is going to be awesome to see what you come up with!

— Flow On Waterford River
— by Jim Fidler
— music.podshow.com