Join Ashley Kennedy for an in-depth discussion in this video Removing scratches and video artifacts with the Scratch Removal feature, part of Editing with Composites and Effects in Avid Media Composer.
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In the last movie we learned how we you can copy and paste pixels from one area of the video frame to another using Clone mode. In this movie we'll explore Scratch Removal, which allows you to copy and paste pixels from one frame of video to another. And this way you're borrowing image information from one point in time to another. Now as you're probably aware, video travels at many frames per second. In the United States, usually either 30 frames per second, or 24 frames per second. Now let's say there's a frame or two of video that has something wrong with it; a scratch, or a video hit.
Well because not every frame of video is affected, you have the option of borrowing information from an adjacent frame to fill in the damaged pixels of the affected frame. Let's take a look. So we are departing from our space theme just temporarily to take a look at just a boring old office. But it does have this awful video hit which we want to fix. And we're going to fix it using the Paint Effect. Now what you need to do is put Add Edits on either side of the video hit and also include one good frame.
So here is a bad frame, here's a bad frame, and then on that side of it it's good. And then on this side of it, it's good. So, I'm going to add an edit right here. And then I'm going to include the bad frame, the next bad frame, and then I'm going to create another Add Edit. Okay, so we have a three frame little segment here, and I want to show you what you can do, and then I'm going to remove it and then show you something else.
If I go into the Image category and apply the Paint Effect, and enter Effect Mode, you can see that one of the mode selections is Scratch Removal, and I can certainly choose that, and then I'm going to draw a shape. Basically for Scratch Removal, if it's over the entire frame like this, you just want to draw a big square over the entire shape. And by default, it takes the good information from the very start of the segment.
So that's why I say include a good frame in the segment. Because right now, if I twirl this down, I am taking the good frame from the start. Now you can also take it from the end, or you can take it relative to where you are, and then move the Frame parameter back and forth, but if you include one good frame at the very beginning we should be good. And now we need to render it. You can see it's a blue dot effect. So it does need to be rendered. I'm going to just go ahead and do that right here, and OK, and if we play it through now, we should have eliminated our scratch because it borrowed the information from this frame right here.
Now, I'm going to undo this, and also in the Image category you can see that there is an entire effect called Scratch Removal. So, this is just a subset of Paint. Again, you can just drag it on. You do need to set your Add Edits on either side, and also include a good frame. And I'm going to go into Effect mode. Again, you have to draw a shape around the problematic area, and it automatically takes it from the first frame. You can see here from start, and so we're going to leave it like that, but same exact thing.
I can either apply it from Paint, or I can apply it from the Scratch Removal effect that exists on its own. As you can see, the Scratch Removal effect allows you incredible versatility, through not only working within each individual frame, but also working through time, and working through multiple frames to achieve a more perfect product.
- Introducing compositing
- Pulling chroma keys with SpectraMatte
- Animating a chroma key
- Working with luma keys using the 3D Luma Keyer
- Masking out part of an image with the AniMatte effect
- Using AniMatte effects as transitions
- Using alpha channels in keys
- Creating a title sequence using a layered Photoshop file
- Changing the color or characteristics of an area inside the video frame using the Paint effect
- Writing words with the Brush tool
- Cloning and tracking objects
- Removing scratches and artifacts