FCP 7: Putting Video Inside a Shape

Posted: January 2, 2012

Valentine’s Day is coming up, so I thought I would use it as the example for one of my favorite effects – putting video inside a shape. This effect is also called a “traveling matte.”

Here’s the finished effect, so you know where we are going. A girl is dancing on a bridge celebrating her love, indicated by the video inside the heart. (Thanks to Pond5 for supplying the clips for this tutorial.)

In this particular case, I created the heart in Photoshop. However, this technique works the same whether you create the shape in Photoshop or download an image you like from the Internet. I saved this image as a PNG as a single layer – no alpha channel (another word for “transparency”) is involved.

NOTE: If you have the choice, saving images as PNG or TIFF provides better quality than JPEG, so I tend to avoid JPEG. However, this technique works the same whether you are working with a PNG, TIFF, or JPEG. With one small change it will also work with PSD files, which I’ll indicate at the appropriate time.

Once the image is created / selected / downloaded it’s time to create the effect.

The order you build clips in the Timeline is important. In this case, the background image – the girl dancing – is placed on V1.

Since she dances exclusively on the left side of the frame, that gives me room on the right to put the shape.

Here’s the shape loaded into the Viewer. This is a single-layer PNG. There is no transparency anywhere in the clip. Edit the shape so it is stacked on top of the V1 clip, with the shape on V2.

Select the V2 clip and apply Effects > Video Filters > Key > Luma Key. This makes the white area of the shape transparent, revealing the dancing girl inside the heart.

Hmmm… We want just opposite effect – so double-click the V2 clip to load it into the Viewer, click the Filters tab at the top of the Viewer window, and change the Key Mode popup from “Key Out Brighter” to Key Out Darker.

Poof! The heart turns solid white and we see the dancing girl around the edges of the heart. Now, however, the heart is in the wrong place and too big.

Click the Motion tab in the Viewer and scale the shape to 80%. Adjust the position of the shape to the upper right corner – remember to keep the shape inside Action Safe, if this project is going to broadcast, cable, or DVD.

In the Browser, edit the video you want to insert into the heart to the Timeline into the V3 track.

NOTE: Because we want multiple images to appear on screen at the same time, we need to stack clips vertically.

Hmmm… we now have TWO problems: the video is the wrong aspect ratio and the video is not inside the heart.

This is where the very cool “magic sauce” comes in. Select the V3 clip and go to Modify > Composite Modes > Travel Matte – Luma.

Poof, again!! The V3 video now appears inside the heart.

NOTE: If you were working with a PSD file, where you retained the layers and their associated transparency information, you would select Modify > Composite Modes > Travel matte – Alpha. Aside from that one setting, the rest of this technique remains the same.

However, the video inside the heart is too small and off-center.

To fix this, double-click the V3 clip to load it into the Viewer, click the Motion tab and scale the image and adjust its position so it fits in the frame.

We don’t need to worry about shooting off the edges of the V3 image, because the only portion of the clip that we see is the portion that is inside the heart; shooting off the edges isn’t a problem – the heart masks them!

NOTE: Be careful scaling video images larger than 100% because they will tend to look grainy and soft.

However, this would look better with a drop-shadow behind the heart. But where do we put the drop-shadow? Answer: Not on any of the three existing tracks!

To add a drop shadow we need to create a copy of the heart shape and apply the drop shadow to the copy.

The easiest way to do this is to select tracks V2 and V3 and type Option+Up Arrow – this moves the selected tracks up one track. (Option+Down Arrow moves the selected clips down one track.

NOTE: This keyboard shortcut only works with video-only, or audio-only, clips. It won’t work with linked audio/video clips.

Then, while holding Shift+Option DRAG the V3 (Heart) clip down to V2. Shift+Option+drag makes a copy of whatever clip you are dragging.

Here’s the final clip alignment:

  • V1: Background
  • V2: Heart shape with drop shadow effect
  • V3: Heart shape
  • V4: Insert clip

Here are the drop shadow settings I used.

And this is our finished effect.

NOTE: You can animate the position of the heart by nesting (Sequence > Nest Items) V2, V3, and V4 – but NOT V1 – and animating it with keyframes.

This ability to insert video into a shape can be used for a single insert clip, or a variety of clips. Because the shape doesn’t change position or size, you can add a variety of different clips and have them all the look the same, as they are placed inside the shape.

You see this effect used in commercials all the time – and, now, you know how to create it, too.

Comments
14 Comments to “FCP 7: Putting Video Inside a Shape”
  1. Regi says:

    Thank you to share, it’s very clear, step-by-step.

  2. wonder says:

    thanks, i am in videotaping a lot of weddings and always looking out for new ways to please my clients.this will certainly help me
    simple powerful and straightforward

  3. Thanks Larry, I love this effect and it’s so simple. I’ll have my students do this technique this week and figure a way to incorporate it in their ‘I Love the 90′s’ segment their doing for their senior video. As a high school teacher, I can see the students trying to put the shadow on V3 and not V2. I will flip the order so it matches your screen shot.
    Here’s the final clip alignment I’ll post for the students:
    V4: Insert clip
    V3: Heart shape
    V2: Heart shape with drop shadow effect
    V1: Background

    Thanks again, Mike

  4. Ken Ackerman says:

    Well done! & very impressive. Seems quite simple and your instructions are top notch.

    As a NewBee joining the FCP Studio 3 hive, I haven’t yet delved into Motion 4.

    Is it safe to assume that:

    1) This can also be done in Motion but might not be as simple & straightforward there as you laid out for FCP 7?

    2) There might be even more things that can be enhanced with the technique ( adding butterflys or mini hearts etc) if one was willing to do it in Motion specifically to get those “extra” effects?

    Ken

    • Larry says:

      Ken:

      Thanks for the kind words…!

      1. Every version of Motion can do this, as well as FCP. Perhaps a bit more simply.

      2. I wrote this example using a still image; however, you can do the same thing with video using, essentially, the same techniques, though it is easier if the video has an alpha channel to simplify the key.

      Larry

      • Ken Ackerman says:

        Thanks for the reply.

        Could a simulated a news room background (via chroma key) that contained one or more “monitor” screens in that background, display a simulated video feeds on those “screens” using this technique? Or is that a horse of a different alpha channel? An actual person reporter would be included in the foreground shot against green screen.

        The point, of course, would be to provide some motion in the “background” to help “sell” the “reality” of the set/studio.

        Ken

  5. Thanks Larry. Been using FCP for several years and you always seem to offer the easiest, quickest solutions to everyday challenges.

  6. Brian says:

    Great tutorial. Thanks for all you do, Larry.

    I need to go one step further. Say another PNG – a graphic that’s a template with space already cut out for the heart – needs to be the “frame” that’s placed on top of all this. So the layering looks like this:

    V4: PNG “frame”
    V3: Video in heart
    V2: Matte PNG (heart)
    V1: Background Video

    I can’t figure out the correct combination to make it work. Everything goes haywire when I bring the V4 PNG into the mix. Any idea? Thanks.

    • Larry Jordan says:

      I can think of several ways to do this. The easiest is to create the frame on a layer in Photoshop. Make everything EXCEPT the frame transparent.

      Save the frame as a PNG. Make sure there is nothing in the background layer.

      Import the frame into FCP and put it on the top layer. As everything except the frame is transparent, you’ll see all the elements below with the frame surrounding the heart.

      You could also key the frame, but that takes more work.

      Larry

  7. Andy says:

    Larry,

    Is it possible to put more than one video in the shape at the same time?

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