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  • In this video I'm going to show you how to use Motion to create an effect like

  • this one.

  • The video being used as an example

  • has a tennis ball bouncing across the screen.

  • When you record a video for this effect,

  • it should be shot with a tripod

  • and a higher frame rate if possible.

  • This video was shot at 720p

  • at sixty frames per second (60fps).

  • The first step is to create a new Motion project with the same settings as the

  • video clip.

  • If you can,

  • select the correct duration of the video here.

  • Motion 5 can be purchased from the Mac App Store for $49.

  • Press the fit button at the top right

  • and choose fit in window

  • to make sure the video will be displayed correctly.

  • Also press the show timeline button at the bottom right of the interface.

  • Then press the show project pane button

  • to display the layers for the project.

  • Now that the interface is set up,

  • drag the video clip from the file browser

  • onto the empty group player in the layers tab.

  • Using the timeline, move the playhead around to preview your clip.

  • Before you start the work, it's a good idea to know how many frames you want

  • in between each freeze.

  • Looking back at the skater,

  • there is about five to eight frames in between each freeze.

  • For this bouncing ball,

  • I found that five frames works well.

  • Make sure the main video layer is selected.

  • Move the playhead to the first frame you want the object of freeze on.

  • With the playhead paused on the frame we're going to freeze press Command-D

  • on your keyboard.

  • This duplicates the video layer. Then press "I" on the keyboard to set an

  • in point on the duplicated layer.

  • next press "O" on the keyboard to set in out point.

  • What we have now is a single frame of video on a new layer. To keep this frame

  • on screen for the rest of the video,

  • go to the Inspector. Open the properties tab

  • and head down to the timing section.

  • To keep this frame on screen as a still image, change the end condition from "none"

  • to "hold".

  • In the timeline

  • dragged the end of the clip to the end of the video.

  • You may need to zoom in to the timeline

  • to select the end of the freeze-frame.

  • Playing back the project at this point will show the video

  • up until that frame with a video freezes

  • our goal is to leave just the ball frozen.

  • In your video

  • this may be a person

  • or other object that creates the trail.

  • The next step

  • is to create the mask around the object.

  • Make sure the correct layer is selected and press and hold the add mask button.

  • Choose a mask based on the object you are working with.

  • In my case I'm working with a tennis ball

  • so the circle mask would be the best choice. Chances are you're working with a

  • more complicated object

  • that requires a Bezier

  • or B-Spline Mask.

  • If I was trying to add a mask to the bench in the background.

  • I would select the Bezier mask and then click on an edge of the bench.

  • You can keep clicking around the object to create the mask.

  • If you click and hold and then drag

  • you will create a rounded curve.

  • Get used to this technique of working with Bezier curves

  • as it comes in handy when working in Motion

  • and other applications like Photoshop

  • Illustrator and Maya.

  • I can delete the mask layer I just created and start over with the

  • circle mask

  • I'll select the circle mask and then click and drag around the tennis ball.

  • When you let go the mask is created and you may not notice any change.

  • Just move the arrow keys to move the playhead forward five frames.

  • Notice the tennis ball moves to the next spot

  • but there is one ball left behind.

  • I can now select the original ball layer and press Command-D to duplicate the layer.

  • "I" then "O" to set the in and out points.

  • Go to the properties tab in the inspector to change the end

  • conditioned to hold.

  • In the timeline

  • I'll drag the new still to the end of the video.

  • With that layer still selected, add a circle mask

  • and draw the mask in the Canvas.

  • Remember that masks can be adjusted anytime.

  • Now it's just a matter of repeating the steps for each frame you want something

  • to be left behind.

  • Command-D

  • "I" then "O"

  • End condition set to "hold"

  • Dragged a frame for the end of the video

  • and then add the mask.

  • Repeat these steps a few more times and then review your progress.

  • Don't finish the entire clip

  • before previewing.

  • If I decided that five frames was too frequent,

  • it's easier to save time and change that now

  • compared to later.

  • At any time when previewing the project

  • press Command-R to create a RAM preview.

  • This is a great way to get a preview

  • with less lag

  • and a clearer look.

  • Make sure you save often with the Command-S shortcut

  • as Motion is a complicated application

  • and can unexpectedly quit at any time.

  • When the effect is finished, use the Share menu to export the video.

  • If you're going to add this to a Final Cut Pro project

  • choose "export movie"

  • You can choose an Apple ProRes format

  • that will work well with Final Cut or other format.

  • If you have any questions

  • send an email to FinalCutProHelp@me.com

  • or check out An Awesome Guide to Motion 5 on Amazon or iTunes

  • iTunes for more information, Thanks.

In this video I'm going to show you how to use Motion to create an effect like

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使用Motion 5創建跟蹤效果 (Creating a trail effect using Motion 5)

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    asin 發佈於 2021 年 01 月 14 日
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