视频编辑时，您可能会发现将某些效果和编辑粘贴到视频剪辑上相对简单。然而，在执行此操作时，您可能会发现效果的应用方式并不十分精确。
然而， Adobe Premiere(Adobe Premiere)具有广泛的功能，可用于按照您想要的方式编辑视频。关键帧是这些功能之一，可以让您获得更精确和多样化的编辑。
一旦掌握了关键帧，它们就非常容易使用，并且在使用效果编辑项目时，您会感觉更加可控。
Adobe Premiere 中的关键帧是什么？(What Are Keyframes in Adobe Premiere?)
关键帧是一项功能，可让您随时间更改效果(effect)或过渡的属性。这意味着您可以更改效果或过渡发生的速度或速度，还可以更改剪辑中开始或结束的时间和位置。
关键帧基本上是您为发生这些更改而设置的时间点。因此，您至少需要两个关键帧才能做到这一点。一个开始效果或过渡，一个结束它。
但是，关键帧使您能够在两者之间添加任意数量的点。这意味着您可以根据需要精确地编辑效果的属性。您可以创建多个起点和终点来更改效果或过渡在项目中的动画方式。
这些属性包括位置、比例、不透明度和旋转等。根据您选择的效果、过渡或剪辑，会有不同的属性。关键帧(Keyframes)可让您为这些属性设置动画以影响剪辑或选定的效果或过渡。
如何在 Premiere 中添加关键帧(How To Add Keyframes in Premiere)
学习使用关键帧相对容易，一旦您了解它们的工作原理，您就可以立即使用它们。
您首先要打开效果控制(Effects Control)面板。您可以通过转到Window > Effect Controls来找到它。当您选择一个剪辑时，您将看到一个名为Video Effects的下拉菜单。这些将是所选剪辑的属性，例如位置或比例。
您还将在下拉列表中看到已应用于剪辑的效果。根据效果，您可以更改不同的属性。在这些列表的右侧，将有一个迷你时间线显示您选择的剪辑。
在此时间轴上，您可以编辑关键帧。例如，让我们将波浪变形效果编辑到剪辑中。将效果放在剪辑上并进入Effect Controls后，您将选择Wave Warp下拉菜单。
假设您要为Wave Height设置动画。首先(First)，将光标移动到您希望第一个关键帧所在的迷你时间轴中。然后，通过单击并拖动旁边的数字值来 更改Wave Height属性的值。(Wave Height)
这是光标到达第一个关键帧时的值。要设置关键帧，请选择Wave Height左侧的秒表。
您应该会看到菱形关键帧出现在迷你时间轴中。Wave Height属性旁边也会弹出一个两侧带有两个箭头的菱形图标。您可以使用它来添加或删除关键帧，以及从一个关键帧移动到下一个关键帧。
您现在可以通过多种方式创建关键帧。如果您移动到时间轴上的新位置并对Wave Height值进行任何更改，则会添加一个关键帧。如果您在时间线上没有选择关键帧， 也可以单击“Add/Remove
您还将看到时间轴中的关键帧下方有灰点。您可以单击并拖动它们以更改关键帧的值。您还可以单击并拖动关键帧本身来更改它们的显示位置。
在 Premiere 中使用关键帧的提示(Tips For Using Keyframes in Premiere)
如果要平滑关键帧创建的动画，可以使用Velocity。这是属性值随时间变化的快慢程度。在关键帧下方的值线下方有第二行，您可以单击并拖动它以显示一些蓝条。如果单击并拖动这些条的圆圈，则可以更改某个点的速度。
您还需要记住，在使用关键帧时，添加到项目中的越多，计算机上处理视频的难度就越大。因此，在使用关键帧进行编辑时，请记住少即是多。
注意(Pay)给出的数字值，以使事情尽可能干净。使用这些值将帮助您确定动画是快还是慢，以及变化发生的速度。这将防止您的效果变得过于波涛汹涌。
如果要从属性中完全删除所有关键帧，可以再次单击秒表按钮以删除它们。
何时使用关键帧(When To Use Keyframes)
既然您知道如何在Premiere中使用关键帧，您可能想知道何时应该在编辑过程中(editing process)使用它们。当您想以某种方式为效果设置动画时，最好使用关键帧。
Premiere允许您编辑效果属性的几乎所有方面，因此，如果您希望过渡更平滑、更长，或者您希望视频失真以某种方式表现，关键帧可以让您做到这一点。确保您清楚地知道要如何为效果设置动画，否则您的关键帧可能会变得混乱。
如果您刚开始在Adobe Premiere中使用关键帧，请练习使用具有不同效果的关键帧来掌握创建流畅动画的窍门。
How To Add Keyframes In Adobe Premiere Pro
When video editing, yoυ might find it relatively simple to stick certain effects and edits onto your video clips. Yet in doing this, you might find you don’t have a lot of preciѕion in how exactly thе effect gets applied.
Adobe Premiere, however, has a wide range of features available to edit your video just the way you want it. Keyframes are one of these features that can allow you to get more precise and varied edits.
Keyframes are pretty easy to use once you get the hang of them, and you’ll feel much more in control when editing your project with effects.
What Are Keyframes in Adobe Premiere?
Keyframes are a feature that allows you to change the properties of an effect or a transition over time. This means you can change how fast or slow an effect or transition occurs, and you can also change when and where in the clip it starts or ends.
Keyframes are then essentially points in time that you set for these changes to occur. So, you need at least two keyframes for this to happen. One to start the effect or transition, and one to end it.
However, keyframes give you the ability to add as many points in between as you want. This means you can edit the properties of effects as precisely as you wish. You can create multiple start and end points to change how the effect or transition is animated in your project.
These properties include things such as position, scale, opacity, and rotation. Depending on what effect, transition, or clip you’ve chosen, there will be different properties. Keyframes let you animate these properties to impact a clip or a chosen effect or transition.
How To Add Keyframes in Premiere
Learning to use keyframes is relatively easy, and once you understand how they work you’ll be able to put them to use in no time.
You’ll first want to open the Effects Control panel. You can find this by going to Window > Effect Controls. When you select a clip, you will see a dropdown called Video Effects. These will be attributes to the chosen clip, such as position or scale.
You’ll also see the effects you’ve applied to the clip in a dropdown. Depending on the effect, there will be different properties you’ll have the ability to change. To the right of these lists, there will be a mini timeline showing your chosen clip.
On this timeline is where you can edit your keyframes. As an example, let’s edit a wave warp effect into a clip. After placing the effect on the clip and going into Effect Controls, you would choose the Wave Warp dropdown.
Say you want to animate the Wave Height. First, move the cursor in the mini timeline where you want your first keyframe to be. Then, change the value of the Wave Height attribute by clicking and dragging on the number value next to it.
This is what the value will be when your cursor reaches this first keyframe. To set the keyframe, select the stopwatch to the left of Wave Height.
You should see the diamond-shaped keyframe appear in the mini timeline. A diamond icon with two arrows on either side of it will also pop up next to the Wave Height property. You can use this to add or remove keyframes, and to move from one keyframe to the next.
There are multiple ways you can now create keyframes. If you move to a new spot on the timeline and make any change to the Wave Height value, a keyframe will be added. You can also click on the Add/Remove keyframe button to add a keyframe if you don’t have one on the timeline selected.
You will also see that there are grey points underneath your keyframes in the timeline. You can click and drag on these to change your keyframe’s value. You can also click and drag the keyframes themselves to change where they appear.
Tips For Using Keyframes in Premiere
If you want to smooth out the animation your keyframes create, you can play with the Velocity. This is how quickly or slowly the value of the property changes over time. There is a second line below the value line under your keyframes which you can click and drag on to bring up some blue bars. If you click and drag on the circles of these bars, you can change the velocity of a certain point.
You’ll also want to keep in mind that when using keyframes, the more you add to your project, the harder it will be on your computer to process your video. So when editing with keyframes, keep in mind that less is more.
Pay attention to the number values given in order to get things as clean as possible. Using the values will help you determine if an animation is going to be fast or slow, and how quickly a change occurs. This will keep your effects from getting too choppy.
If you want to fully delete all your keyframes from a property, you can click on the stopwatch button again to get rid of them.
When To Use Keyframes
Now that you know how to use keyframes in Premiere, you might wonder when you should use them in your editing process. Keyframes are best used when you want to animate an effect in a certain way.
Premiere allows you to edit nearly every aspect of an effect’s properties, so if you want a transition to be smoother and longer, or you want your video distortion to behave a certain way, keyframes let you do this. Make sure you have in mind exactly how you want to animate an effect, or your keyframes could turn out messy.
If you’re just starting to use keyframes in Adobe Premiere, practice using them with different effects to get the hang of creating a smooth animation.
