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Trimming your shots is so important, and in the previous movie we saw how ripple trims can help you improve the timing and pacing of a scene by working on one side of an edit at a time. Now sometimes, however, it's beneficial to be able to manipulate both sides of the transition simultaneously, and this is called a Roll Edit. Let's go into our 4.2 sequence, and usually you won't use a roll edit for normal trimming, because honestly when you're adding frames to the A side, chances are you don't need to simultaneously subtract the same number of frames from the B side.
Now that just isn't practical. However, you do use roll edits all the time when you create split edits or L cuts which is what you do when you trim the video but not the audio of a cut or vice-versa. So let me just zoom in a little bit here, Command+Plus, and so what are roll edits useful for? Well, it's useful when you have a scene with two people talking, and you want to cut to the reaction of one of the non-speaking characters either before or after the cut.
So let's take a look at how to do this. All right, so by default when on I click on a transition with the Select tool, I can select only the A side or the B side of the edit, not both simultaneously. But if I come to this menu here and switch to the Trim tool, keyboard shortcut T, now notice that I can select them both at the same time. Okay, now I have got this edit selected, about 38 seconds in, I am just going to play around the edit, Shift+Question Mark so we can see what's going on here.
(male speaker: Meet it.) (Joseph: That's it?) Joseph's boss is telling him to meet the deadline and Joseph is kind of reacting in disbelief. Now what I want to do is actually show Joseph's boss walk away. We can't actually see him do that. Now if I was to roll the edit to the right, like so, you can notice in the A side clip that he starts to walk away. But now if I release, let's take a look at what happened to this Edit, Shift+Question Mark.
(Joseph: Six p.m., huh?) I roll right over the beginning of Joseph's dialogue, and that isn't what I want to do at all. So let me Command+Z to unto that, and we want to talk about how we can trim just the video and not the audio. So the way that we do this in Final Cut Pro X is to select the clips that you want to separate the video and audio from, and then I am going to right-click and choose Expand Audio/Video. Now when I click on the video, notice that I can roll just the video, and the audio remains intact.
So let's go ahead and see Joseph's boss walk away, and we are not rolling over Joseph's audio, so let's go ahead and take a listen to see how this works now. (male speaker: Meet it.) (Joseph: That's it? Six p.m., huh?) Okay, so we were able to create this split edit, and it's called a Split Edit or an L Cut or a J Cut in this case because we have split the audio from the video, but everything remains in sync, and we haven't destroyed anything.
Also when I am rolling a shot, all of the keyboard shortcuts from rippling still apply. So I can use my comma and period keys to roll back and forth, one frame at a time. Now when you are done working with the clips in the Expanded form, you can close them back up by selecting them and then right-clicking and choosing Collapse Audio/Video or keyboard shortcut Ctrl+S, and now everything is wrapped up, and I'll just zoom out a little bit, Command+Minus, and you can kind of see that there's an indication that we have this split edit here, but when we play it, everything looks good.
(male speaker: Meet it.) (Joseph: That's it? Six p.m., huh?) Let's just try one more. So let's come downstream, and let's take a look at a couple of these edits and see if there are any opportunities for a Roll edit. (Joseph: ...then don't use me. We all know what risky decisions lead to. The company's in free-fall and you want to take risk again. It's a creative approach.) Maybe right there.
As Joseph is finishing his line, maybe we can cut to his boss' reaction a little bit early. So again, I don't want to just roll right here with the video and audio, I want to select these clips, press Ctrl+S to break them apart, then select just my video and roll over and catch him turning around like saying, "What are you talking about?" and let's see how this looks. (Joseph: ...free-fall and you want to take risk again. It's a creative approach.) I think I like it. It's pretty tense there.
Let's go ahead and close up these clips, so I will just select them, press Ctrl+S, and we are back just in Normal mode. Now just as with other types of tools, as soon as I'm done using the Trim tool, I am going to press A to get back to the Select tool so that I can perform most of the other basic types of edits that can only be done with the Select tool. But bottom line, I will continue rolling through the sequence, making sure that I'm showing the right image at all times while not sacrificing all of the important work I did in getting the audio perfect.
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