1118123883 split 4 3741

Part VIIIWorking with Video and Animation IN THIS PART Chapter 25 Understanding Video Editing Basics Chapter 26 Animating in the Timeline Panel Chapter 27 Correcting Video Files and Add

Trang 1

Part VIII

Working with Video

and Animation

IN THIS PART

Chapter 25

Understanding Video Editing Basics

Chapter 26

Animating in the Timeline Panel

Chapter 27

Correcting Video Files and Adding Artistic Effects

Chapter 28

Animating Using Frames

Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com

Trang 2

Understanding Video

Editing Basics

IN THIS CHAPTER

Dealing with aspect ratios

Using the Timeline panel

Opening video files

Trimming video clips

Rearranging video footage

Splitting video clips

Deleting unwanted video footage

Adding files to a video project

When working with video, Photoshop enables you to bring in pieces of video that need the

special Photoshop touch and clean them up a bit Photoshop does not enable you to create

an extensive video project like Adobe Premiere Pro With Photoshop, you can create fantas-tic composites with video files that you may not be able to accomplish in fine Photoshop style any-where else The Timeline panel gives you just enough capability to make working with video files an efficient and relatively uncomplicated process

The first step in being able to edit your video files in Photoshop is to understand the video

work-space The Timeline panel is practically an application all by itself, giving you the ability to add,

edit, and move video clips not only as layers but also through time You can also add other layers,

such as image files, text, and 3D objects In this chapter, we show you how you can open, add, and maneuver these files within a video timeline so you are prepared to correct lighting and color and

create artistic effects with video files and image files

Trang 3

Part VIII: Working with Video and Animation

Working with Video Files

To work with video successfully, you need to know the basics of video file formats, why they are different, and how they work Some file formats are of higher quality and, consequently, larger than those of lower quality You must also understand aspect ratios Photoshop has more possibilities for changing the aspect ratio than you might think Using the right aspect ratio and understanding the settings are important to creating successful video files within Photoshop

Review the basics of video file formats in Chapter 3

Setting aspect ratios

An aspect ratio is the relative width to height of a video or image The frame aspect ratio indicates the ratio of the video or image frame You are probably familiar with the 4:3 and 16:9 aspect ratios that are industry-standard television sizes The next step in getting to know all about pixels is understanding the pixel aspect ratio

Correcting the pixel aspect ratio

Individual pixels also have aspect ratios Depending on the video standard, pixels have either

a square aspect ratio or a rectangular aspect ratio A computer monitor, for instance, is usu-ally set up for square pixels For example, a 4:3 monitor typicusu-ally has a setting of 640 pixels wide and 480 pixels tall, which results in square pixels

Televisions do not have square pixels Their pixels match the aspect ratio of standard video, which is rectangular That means that when you play a movie on your computer that is a standard video format, the video is distorted unless the pixel aspect ratio is taken into account and adjusted

When you import a video file into Photoshop, it automatically performs a pixel aspect ratio correction on the document, so it appears just as it would on a television screen This reduces the preview quality of the document, but it is only for preview purposes and doesn’t change the document materially in any way, as shown in Figure 25.1

You can turn off Pixel Aspect Ratio Correction and preview the video with all the pixels intact The image looks distorted, but it actually contains the correct number of pixels Simply choose View ➪ Pixel Aspect Ratio Correction to toggle the correction on or off Figure 25.2 shows an image with this feature turned off

Note

You can view both pixel settings at once by choosing Window ➪ Arrange ➪ New Window for (document name) This

Trang 4

25

FIGURE 25.1

When Pixel Aspect Ratio Correction is turned on, the image looks normal

FIGURE 25.2

This is like watching regular 4:3 television on a 16:9 television

Changing video aspect ratios

Aspect ratios such as 4:3 and 16:9 are industry standard You are probably less familiar with

pixel aspect ratios, which is what Photoshop uses The Photoshop preset aspect ratios enable

you to translate pixel aspect ratios into more familiar terms The number listed in parentheses

Trang 5

Part VIII: Working with Video and Animation

is the relative height of the pixel to a width of 1 For example, D1/DV NTSC (0.9) has a pixel aspect ratio of 1 pixel wide and 9 pixels high, making it slightly wider than it is high Here’s a list of the pixel aspect ratios:

n Square Most computer monitors have square pixels Some video made for a 4:3

screen ratio is also captured at 640 x 480, making the pixels square

n D1/DV NTSC (0.91) This is a standard capture ratio for pixels, with a pixel ratio of

720 x 480 Standard 4:3 televisions and video cameras both probably have this set-ting Figure 25.3 shows an example of this aspect ratio

FIGURE 25.3

A pixel ratio of 1:0.9 creates nearly square pixels and is just right for a 4:3 frame

n D1/DV PAL (1.09) The PAL pixel ratios create a pixel that is taller than it is wide

This is the standard pixel aspect ratio used for 4:3 screens PAL is the video format used in most countries outside North America

n D1/DV NTSC Widescreen (1.21) This is the common pixel aspect ratio for an NTSC

16:9 screen Most video cameras also shoot in this aspect ratio

n HDV 1080/DVCPRO HD 720 (1.33) This is the standard pixel aspect ratio for

big-screen movies and is becoming more popular with higher-quality video cameras The

Trang 6

Trang 7

Although this is obviously not a real image, creating a drop shadow and then separating it from the elephant allowed us to distort it to look like a real shadow, thus increasing the realism

Using layer styles

along with this

3D animation of

a ball bouncing

around a lighted

lamp allowed

us to simulate

the lamp being

broken You

can learn how

to create layer

Tiêu đề	Understanding Video Editing Basics
Trường học	University of Simpo
Chuyên ngành	Video Editing and Animation
Thể loại	tieu luan

Định dạng
Số trang	7
Dung lượng	11,97 MB