Highlighting an area of interest

With the Matrox realtime colorization effect, you can adjust the brightness and contrast, or control the red, green, and blue components of a clip. You can also crop your clips and effects in real time to control how they appear on the screen. Using a combination of both the realtime colorization and cropping, you can create special effects that help you focus on a particular area of interest in your video projects.

1. Set up the Adobe Premiere Timeline
   Start Adobe Premiere and import a video clip, placing it onto the Timeline on track Video 1A. Select the clip, choose Edit > Copy, select track Video 2, then choose Edit > Paste to make a duplicate of the original clip. Make sure that you exactly align the two clips on the Timeline.

   
2. Add colorization
   Drag the Matrox Colorization video effect onto the clip on Video 2. The Colorization dialog box appears. Choose an effect from the Effect List, or click the Custom Colorization tab to change the settings for your selected colorization effect. Try choosing the Orange Burst effect.
3. Add cropping
   To apply crop settings to your colorization effect, click the Crop tab. Use the crop controls to crop any edge by a given number of pixels. The idea here is to highlight an area of interest with the colorization effect, while using the crop feature to reveal the original clip on track Video 1A, unaffected by the colorization.
4. Apply an animated crop over time
   Because the crop settings are keyframeable over time, you can create keyframes on the Crop track to precisely position and move the highlighted area to follow the action of your clip. Now let's move the cropped area over time to highlight the skier as he moves in the frame by adding more keyframes with different crop settings on the Crop track, similar to the following illustration. (If you're not familiar with creating keyframes, see Customizing your effects using keyframes.)
5. Finish the effect
   Finally, apply an Alpha Channel key to the clip on Video 2 to make the cropped areas transparent, revealing the original clip on track Video 1A. To do this, right-click the clip on Video 2, choose Video Options > Transparency, select Alpha Channel as the Key type, then click OK. Note   You need to apply an Alpha Channel key to the clip on Video 2 only because it's a copy of a clip that was originally placed on track Video 1A. When you place a clip directly on a superimposition track, you can apply a Matrox video effect without having to also apply an Alpha Channel key.
6. Preview your effect in real time
   To preview your effect, press the Play button in the Monitor window or press the Enter key on your keyboard.