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对视频编辑遮罩来实现特效 – 译学馆
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对视频编辑遮罩来实现特效

Photoshop Playbook: Masking Video for Special Effects

Photoshop Playbook对视频编辑遮罩来实现特效
Photoshop PlaybookMasking Video for Special Effects
令你的视频更有活力的方法之一
One of the ways that you can make your video more dynamic
就是在Photoshop中使用遮罩为选择性地
is by using Masking in Photoshop in order to selectively
在图像中显示或隐藏动态的不同区域
show and hide different areas of motion in the image.
你看我有一个视频片段
Here you can see I have a video clip,
如果我想在时间轴上播放它
and if I want to play that video clip down in the timeline,
单单按“播放”键即可
I’ll simply tap on the Play button.
看到它是关于瀑布的一段视频片断
So we can see that it’s a video clip of a waterfall.
现在我按“空格”键停止播放
Now I’m going to tap the spacebar in order to stop that,
往前去 使这个片段变短一点
and let’s go ahead and just make this clip a little bit shorter,
我打算剪辑掉它末尾的部分 拉进
I’m going to clip it on the end of it and then drag into,
大概十秒左右
maybe about ten seconds,
设置一个新的终止点
to set a new out-point.
我需要做的是
Now what I need to do is
冻结整个片段的动态
I need to freeze the motion of the entire clip,
这很容易操作
and that’s very easy to do.
我想用当前的时间指示器
I want to use my current time indicator
移动回剪辑的起始端
to move back to the beginning of the clip.
然后快速点“选定” “全部”
And then I’ll do a quick Select, All.
接下来 菜单“编辑”中 按“复制”
And then Edit and Copy.
我复制了这一幅静态图像到剪贴板
Now I’ve copied this one still image to the clipboard.
在我粘贴之前 选择关闭“Video Group”
Before I paste it, I wanna choose to close the Video Group,
否则如果我立即粘贴
otherwise if I select Paste right now ,
你会看到它被加进了“Video Group”中
you can see that it adds it inside the Video Group,
在这里它排列于时间轴上
and here it’s sequenced it down on the timeline.
我不想那样 因此我打算用“Command+Z”撤销
I don’t want that, so I’m going to undo that using command Z,
关闭“Video Group”
then I’ll close the Video Group,
选“编辑” 再“粘贴”
choose Edit, and then Paste.
看到在时间轴上 我拥有的静态图
Now we can see in my timeline that I have the still image
直接置于动态图像或视频片段的顶层
directly on top of the motion image or the video clip.
我扩展它 这样它们就拥有了相同的时长
And I’ll extend that so they both have the same duration.
按“空格”键
Now if I tab the spacebar,
静态图在顶层
you’ll notice that the still image is on top,
一动不动
so nothing is moving.
但如果我们回到时间轴起始端
But if we’ll turn back to the beginning of the timeline,
向图层2静态图添加“遮罩”
and then add Mask to Layer 2 the still image,
选择“画笔”
I can then select my paintbrush,
涂黑色
and if I’m painting with black,
在图像上把我想隐藏的任何地方都涂黑
I can paint anywhere in my image that I want to hide.
记住 我要隐藏静态图
Now remember I’m hiding the still image,
如果我点击“Video Group”旁的“眼睛”图标
and if we click on the eye icon next to the Video Group,
你就会看到我们实际上
you can see that we would actually
能看到贯穿静态图
be able to see through the still and
视频底层播放的任何东西
see whatever is playing in the video underneath.
所以我按回“眼睛”图标
So I’ll topple back on the eye icon,
再按“空格” 我们看到
and then tap this spacebar, we can see that
只有瀑布的很小区域被显示
only that small area in the waterfall is revealed.
如果我们想更有趣
Now if we wanna get fancy,
我们继续 创建一个延时移动的遮罩
we can go ahead and create a Mask that moves overtime.
为此我要确保
In order to do this I’ll make sure that
回到时间轴起始端
I’m at the beginning of my timeline again.
按“G”启用渐变工具
And then I’ll tap G to get the Gradient tool,
或者用“反渐变”
or use the reflect Gradient,
点击并拖拽出一个渐变
and I’ll click and drag out a Gradient.
为看到效果 按“反斜杠”键
Now in order to see that I’m going to tap the Backslash Key
红色的虹膜覆盖就是我创建的遮罩
that red rubylith overlay that is the Mask I’ve created and
在图层面板我们看到它在遮罩中
we can see that in the Mask, in the layers panel.
但是我想从图层中分离遮罩
But I wanna separate the Mask from the layers
这样我就能独立移动它们了
so that I can move them independently.
点击它们之间的“链接”图标
So I click on the little link icon in between them,
用“移动工具”
and I’ll use the Move Tool.
移动遮罩到图像的左侧
Move the Mask to the left side of the image.
然后在电影胶片中 我打算
Then in the filmstrip I’ll going to
点击图层2旁的隐蔽三角形
click in the disclosure triangle next to Layer 2.
因为我在时间轴的起始端
And because I’m at the beginning of the timeline,
为遮罩位置图层这里开启“秒测”
I’m going to start the Stopwatch here for Layer Mask Position,
这样做就是设定一个关键帧
what that does is it sets down a keyframe.
然后穿梭时光到片段末尾
Now we can travel in time to the end of the clip,
我移动遮罩 重新定位至右手侧
and if I move the Mask Reposition in it over to the righthand side,
Photoshop为我自动添加第二个关键帧
Photoshop will automatically add a secondary keyframe for me,
现在我们立即擦回
and now we scrub back in time
观察到遮罩移从图像上移过
we can watch that the Mask move over the image.
通过按“反斜杠”键 切换关闭遮罩可视
I’ll toggle off the Mask’s visibility by tapping the Backslash Key.
然后按“空格”键播放它
And then we’ll tap the spacebar in order to play it.
我们能看到遮罩动来动去
We can see that the Mask moves across,
瀑布中的水流缓慢变暖然后再冰冻
slowly thawing and then refreezing the water in the waterfall.
你掌握了
So there you have it,
使得视频更有趣的一个方法
a way to make the video more interesting
通过选择性的隐藏
by selectively hiding and
在视频片段的不同区域显示动态
showing motion in different areas of the video clip.
Photoshop Playbook
Photoshop Playbook
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Go to Ps Playbook Playlist
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Watch Selective Edits

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视频概述

在Photoshop中,静态图+遮罩,实现视频中局部动态播放;还可以做跑马灯式遮罩。

听录译者

小多荷

翻译译者

GreenT

审核员

S

视频来源

https://www.youtube.com/watch?v=hU2zHuzS6DI

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