✓ Click anywhere in the preview to create a point. Move your mouse cursor to the Video Preview window and it changes to a pen. You can always enter exact numbers for these location or rotation values in the Bézier Masking controls in the Video Event FX window. The white and yellow control points don’t change, so you are always able to change the size of the rectangle even if you’ve moved the corner of the mask area outside the visible preview window. ✓ Drag the white dot on the circle, the rotation handle, to change the angle of the mask rectangle. If you move the rectangle away from your noticeable object, in this case the Shuttle orbiter, you will no longer see it. The image doesn’t move with the rectangle you’re changing the location of the mask, not moving the image itself, so as you do, different parts of the video image show through the mask. Click, hold, and drag to move the rectangle. ✓ Move the mouse cursor to a location inside the rectangle, but not on the circle. Drag any yellow edge point to change the width or height of the rectangle independently of each other. ✓ Drag any white corner point to change the size of the rectangle while preserving its aspect ratio. You’ll use these points to control the location, shape, size, and rotation of the mask. Now, close the track motion and open up the track motion for your second clip! Repeat steps 6-9, and when naming it as a preset be sure to say “Left Hand Side Split” or something similar.The rectangle containing the visible portion of the video has white control points at the corners, yellow control points at the centers of each edge, and a control circle in the center.This will save the preset for future use and will be available from the drop down menu! Now hit the Save / Floppy disk icon to the right of the text. Before closing the Track Motion on the top track, click in the top white space where it says “(Untitled)” and write in “Right Hand Side Split” or something similar.Stop when you are satisfied with its position. Watching your preview, you can see your clip skewing in size to the right. Now, place your cursor at the top left hand corner of the box shown in the Track Motion window.
![mask in sony vegas pro 9 mask in sony vegas pro 9](https://i.pcmag.com/imagery/reviews/019PQtkGODjmD9tOZL99Wsa-9..v1631301729.png)
![mask in sony vegas pro 9 mask in sony vegas pro 9](https://www.techrepublic.com/a/hub/i/2008/02/11/66d6293f-c3ba-11e2-bc00-02911874f8c8/187754.png)
The “Track Motion” button can be found to the left of the video clip, the button has a black arrow inside a white box, pointing towards a small blue box (great description right?). Go to the “Track Motion” on the top video track (your first clip) and click it.
![mask in sony vegas pro 9 mask in sony vegas pro 9](https://www.brainstormtutoriais.com/wp-content/uploads/2017/07/tutorial-sony-vegas-como-fazer-u-4-1280x500.jpg)
Try using one of the audio clips, or even replace both of them with custom music or sound. Two audio tracks playing together won’t sound great. Place both video clips on separate video tracks.( You can use Open in Vegas, or simply find your clips in a video folder and drag and drop them into the Vegas window.) Open up your two video clips in Vegas.
![mask in sony vegas pro 9 mask in sony vegas pro 9](https://www.vegascreativesoftware.com/fileadmin/user_upload/seo/keyword/bezier_masks_for_motion_tracking/seo-bezier-mask-screenshot-9.jpg)
To stay classy, we’re going to put the instructions in a nice list down here for you to follow. It’s very simple to create as long as you follow the steps carefully! The Split Screen Effect is simply two video clips, playing side by side simultaneously. A very commonly requested effect and yet a very simple effect to create, is the “Split Screen Effect”.