WEBVTT Kind: captions Language: en 00:00:01.280 --> 00:00:06.400 Working with a green screen? Allow us to show you how chroma keying works within Final Cut Pro. 00:00:08.320 --> 00:00:12.240 Chroma Keying allows you to take certain colors and make them transparent. 00:00:13.200 --> 00:00:19.017 This is the process used for removing green screens, allowing you to place any background behind your subject. 00:00:20.160 --> 00:00:23.440 We'll use a chroma key to place a background behind these parrots. 00:00:24.560 --> 00:00:28.421 First, we'll add the foreground clip to the primary storyline... 00:00:30.320 --> 00:00:32.640 ...and drag the background clip right below it. 00:00:34.880 --> 00:00:39.920 Select the foreground clip in the timeline, then open the "Effects" menu on the right. 00:00:43.280 --> 00:00:46.640 In the Effects browser, we'll locate the "Keyer" effect. 00:00:47.600 --> 00:00:53.360 We'll do this by clicking on "all" and typing "key" into the search bar. 00:00:54.800 --> 00:00:57.840 Then we'll drag the effect to the foreground clip. 00:01:00.720 --> 00:01:07.351 As you can see, the key effect analyzed our clip for the dominant green color and removed it automatically. 00:01:09.120 --> 00:01:11.840 I've got the keys to this chroma. 00:01:13.520 --> 00:01:16.160 Now that we've applied the effect, we can adjust it. 00:01:17.120 --> 00:01:19.360 Navigate to the Inspector on the top right. 00:01:20.000 --> 00:01:29.830 If the Inspector is not visible, click on this icon and select the video icon to access the key effect controls. 00:01:31.440 --> 00:01:33.520 Now let's see how we can refine the effect. 00:01:34.480 --> 00:01:37.040 First, we can check how accurate our key is. 00:01:37.920 --> 00:01:40.880 This is easier to see if we click the "Map" view. 00:01:43.680 --> 00:01:48.080 In this video, white means visible, while black means transparent. 00:01:48.800 --> 00:01:54.480 So ideally you want your subjects to be completely white and your background to be completely black. 00:01:55.680 --> 00:02:03.192 The key mistakenly erased the green feathers on the parrots, so we'll need to bring those back using the key controls. 00:02:04.640 --> 00:02:07.840 But first, let's go over a few things. 00:02:08.400 --> 00:02:16.954 Heads up- please subscribe, comment, and share, and like, and do everything you can, because this tutorial is awesome. 00:02:18.880 --> 00:02:24.800 If we need to resample the color that gets keyed out, we'll use these refined key controls. 00:02:26.400 --> 00:02:33.803 We'll click on the sample color thumbnail image and draw a rectangle in the viewer over the color range that we want to make transparent. 00:02:34.720 --> 00:02:39.200 So here, the rectangle covers the green screen and the blue of the parrot's feathers. 00:02:40.560 --> 00:02:44.320 To adjust the range, we can drag to move our selection around. 00:02:45.200 --> 00:02:49.840 And since we're in composite view, we'll see an updated preview as we work. 00:02:51.040 --> 00:02:55.120 To add more colors to our selection, we can drag additional rectangles. 00:03:00.160 --> 00:03:06.160 If we want to refine any difficult areas such as hair or feathers, we can use the "Edges" tool. 00:03:09.440 --> 00:03:17.800 With this we can draw a line around the difficult area with one end in the area to keep, and the other in the area to remove. 00:03:18.960 --> 00:03:25.807 Unfortunately sometimes it won't work well, like in this case where it's selecting too many colors to make transparent. 00:03:27.040 --> 00:03:31.920 In these cases, moving the edge tool or adjusting it may help. 00:03:31.920 --> 00:03:37.360 For a shortcut, we can hold the "Shift" key and drag to draw a sample color adjustment rectangle. 00:03:38.800 --> 00:03:42.160 Or, hold the "Command" key to add an edge adjustment line. 00:03:43.600 --> 00:03:48.952 It looks like there's too many of these selections to make a difference, so we'll go ahead and undo these. 00:03:52.880 --> 00:03:54.880 Let's continue checking out these controls. 00:03:55.440 --> 00:03:58.560 The "Strength" parameter defines the sensitivity of the key. 00:03:59.120 --> 00:04:01.440 So let's see what happens if we take it down to zero. 00:04:02.960 --> 00:04:07.280 We can see a difference already, but let's click on the matte view to get a better look. 00:04:08.960 --> 00:04:14.320 Since the strength is so weak, some of the green screen is starting to come back on the right. 00:04:14.320 --> 00:04:22.275 That is not what we want, so we'll switch back to composite view and adjust the strength of the transparency to our liking. 00:04:28.560 --> 00:04:33.200 We already showed you these views, but here's a better explanation for how to use them. 00:04:34.000 --> 00:04:37.280 "Composite" shows us a preview of the final keyed image. 00:04:38.960 --> 00:04:45.085 "Matte" shows a grayscale representation of the keyed areas, making it ideal for checking our accuracy. 00:04:45.840 --> 00:04:49.840 Again, we want our subjects to be in white and everything else in black. 00:04:50.960 --> 00:04:57.888 And "Original" shows the original unkeyed foreground image making it good for identifying colors that we want to key out. 00:05:00.880 --> 00:05:03.760 Okay, now let's address the elephant in the room. 00:05:04.320 --> 00:05:10.524 You may have noticed that the key picked up the green in the parrot's feather, changing them to a weird brown color. 00:05:11.200 --> 00:05:14.160 So let's explore these controls and see if we can help that out. 00:05:16.400 --> 00:05:21.040 "Fill holes" is a helpful tool for solidifying areas that were partially transparent. 00:05:22.480 --> 00:05:26.240 An "Edge Distance" lets you change where the fill hole parameter ends. 00:05:26.800 --> 00:05:31.680 The lower the edge distance, the closer the filled area gets to the edge of the subject. 00:05:32.400 --> 00:05:39.341 And increasing the edge distance too much could result in some unwanted transparent sections that should be solid. 00:05:40.960 --> 00:05:47.890 Next, to control how much the keyed out background color affects the foreground image, adjust the "Spill Level" control. 00:05:49.200 --> 00:05:53.520 This is exactly what we needed to bring back the green feathers on the parrots. 00:05:55.360 --> 00:05:59.680 "Invert" reverses the keying operation, creating more of a window effect. 00:06:00.720 --> 00:06:02.400 Uncheck it to revert to normal. 00:06:04.480 --> 00:06:08.560 And to mix the keyed effect with the unkeyed effect, adjust the "Mix Control." 00:06:11.520 --> 00:06:13.760 Now let's check out our result by playing the video. 00:06:16.960 --> 00:06:25.173 These results are not perfect, but in the next video we'll dive into more advanced controls to show you how to get as close to perfect as possible. 00:06:26.960 --> 00:06:30.880 Like, share, subscribe, tell your friends, tell your neighbors! 00:06:33.280 --> 00:06:43.689 Don't forget to check out Pixel Film Studios, where you can find Final Cut Pro plugins designed for beginners and professionals alike to 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