Starting in the Editing workspace, open the Effects panel (Shift+7) and apply the Directional Blur effect to the clip in your sequence.
Once you’ve identified the area of movement that you’d like to improve by adding a slight amount of motion blurring, open the Effect Controls panel (Shift+5) and draw a Directional Blur mask around the subject in the Program Monitor, using whichever masking tool works best. It may help to increase the Zoom level of the Program Monitor. Leave the effect’s settings at their default values for now. If your shot is static, you can skip the next step.
If the area of interest moves across the scene, track the mask to follow it accordingly. Click the Track Mask directional arrows, stopping as necessary to readjust the mask in case it drifts. Depending on whether your subject enters from offscreen, you may find it easier to start tracking in the middle of the clip and then go back and track in the opposite direction. Track one frame at a time to fine-tune mask tracking at the edge of the frame. Play the sequence to make sure the mask stays on target.
Adjust the Directional Blur values in the Effect Controls panel to suit the motion you’re blurring. Set the blur’s Direction to follow the action. Increase Mask Feathering if you need to soften the mask’s edge. Play the sequence, looping it so that you can fine-tune your adjustments and see the results in real time. You’ll find that a little Blur Length goes a long way.
Add more instances of the Directional Blur effect, or additional effect masks, as needed. Right-click to rename each one so you can identify them later.
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