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VT | Compositing in TEd


Concept: Overlaying text or video on another clip
Module: VT-Edit
Assets:
Overlay.zip file (79k download)
Time: 5 minutes

VT-Edit boasts many powerful real-time capabilities, including the ability to layer text or chroma-key numerous video layers. This [2]torial explains the basics to overlay a text layer over a video clip. The Overlay.zip file above contains a 32-bit Targa file created in Aura, so you should begin by downloading Overlay.zip and extracting this to either a system or video drive.

  • Open VT-Edit and clear out any projects by selecting File | New Project
  • Go to the Timeline/ File Bin view by pressing F5
  • In File Bin, navigate to your video drive and select a clip of your choosing that is 5 to 10 seconds long, dragging it into the Timeline.
  • Double-click in the empty area below the clip, and Timeline will automatically zoom in to fill the view with the selected clip.
  • Navigate to the folder you unzipped Overlay.zip to, and drag Revolution.tga into Timeline below your video clip.
  • Hit play. You’ll notice that the overlay’s black region hides your video.
  • Right-click on Revolution.tga and choose Commands Enable Overlay Status. Playing this now shows the video behind the lower-third.
  • Adjust the time of the overlay to make it shorter in duration than your clip (if necessary) by dragging the right or left edge in Timeline and shortening its length.
  • It overlays as it should, but it cuts abruptly on and off screen, so let’s remedy that.
  • Positioning the cursor over the lower corners of our overlay, the cursor changes from an arrow to a dashed vertical line with ‘Fd’ which stands for Fade.
  • Left-click and drag the line inward on both the In and Out points of the clip, setting the fade in and out times at about 1 second.
  • Just Press Play. Now, the lower-third fades in, overlays, and then fades out.


Fade handles apply to overlay, video or audio tracks

That’s nice, but we can assign real-time motions in VT-Edit as well, so let’s have it scroll up into view instead of simply fading in:

  • Click once on Revolution.tga to make sure it’s selected.
  • In Edit Properties (F8), go to Video: Positioning
  • Press Stop in VT-Edit to jump to the overlay’s first frame
  • Place the mouse over the position control window


You can easily adjust any clip’s size, aspect or edges in this window.

    • Grabbing a corner allows you to resize
    • Grabbing an edge allows you to squash or stretch
    • Grabbing an edge holding down Ctrl allows you to crop edges
    • Dragging the Magnifying glass up or down will zoom for easier manipulation
  • Left-click inside the light shaded box and move it down about halfway. As you do, you will see in both Edit Properties and in your program monitor the overlay slides out of view.
  • Click Keyframe All
  • Holding down the Ctrl key, press the left arrow on the keyboard once to move the time bar forward one second (the length of our fade IN).
  • In the Properties panel, click the Reset button to return the CG to its default position
  • Click Keyframe All. Now, we have our text scrolling up into position as it fades in.

This quick explanation is for one layer, but VT-Edit gives you the power to combine as many layers of text or graphics as you need, at any time, in real-time.

If you have an idea for a [2]torial, please e-mail vt2tutorials@newtek.com and we will get it posted, and be sure to check back daily, as the [2]torials page continues to grow.


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