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What has been around for Photoshop since 2018, Adobe has now also developed for After Effects: The content-based fillingthat help you get unwanted Remove objects from videos can. At last! After all, it often happens that disturbing details are only discovered in retrospect in videos and a new shoot is too time-consuming.
With the content-based filling, you can now delete these details very easily and straightforwardly from videos. After Effects analyzes the selected area frame by frame and fills it with surrounding pixels. It's the same principle as in Photoshop. Camera movements are no problem either!
How content-based fill works
1. We select the video in the composition and draw a path around the object that is to be removed. So initially a mask. It is a good idea to draw the path as close as possible to the contours of the object.
2. In order to see the area outside the mask, you have to open the mask mode "Without" put. Shortcut M shows you the mask directly in the control panel. Optionally, you can click through the sub-items of the level.
3. Since the object or even the camera moves during the video, it must be guaranteed that the area to be deleted remains selected during the entire composition. To do this, we set in the mask path Keyframes. So we follow the mask while the video is playing and every frame that the object moves out of the mask, we adjust the path.
4. Once we have perfected the mask, we change its mode to again "Subtract".
5. Now we switch to the window "Content-Aware Fill". Which setting is best depends on the video and must be tried out. Alpha expansion, for example, adds the object After Effects will fill it with. Then another click on "Generate fill layer" and after a few seconds of calculation, After Effects removed the object.
In the practice test
Of course, we also tested the new feature. In the following video we see two elephants: a fully grown elephant moves through the grass while a calf is eating in the background. As an example, we want to focus on the big elephant and take the calf out of the video for a short time. The camera moves a little.
Since the calf doesn't move much, it is enough to adjust the position of the path with a few keyframes during the video. We achieve the best result if we choose the alpha extension as small as possible. Yet: In our case, the result doesn't look really satisfactory. The contour of the path can be seen because within this the image is blurred and at the beginning of the video the area moves unnaturally with it.
But what helped was one Reference frame to create. If you click on this button, you will be redirected to Photoshop, where you can edit the empty area with the stamp tool, for example, so that it looks more natural. The result is better, but you can still see the edges of the selection.
The new feature is likely to work in some cases. Since the task seemed to be simple in our example video, the result is unfortunately not optimal. We can only hope that Adobe will continue to work on the tool.
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