Getting into the 3D World - Photoshop 3D for Animators - page 29

fps, the smoother the animation is, because the eye has much more of an
image sequence to recognize, which gives a sense of a more realistic
animation efect.
The second issue is the size of the ile; with an increase in the number of
frames per second, the size of the ile increases, because of the increasing
number of images that create the animation. Although these two factors are
not the only factors that afect the animation, they are two of the most
important concepts when considering high or low fps rates in the animation.
Another factor that afects the fps rate for the video animation is the output
media. Video animation can be displayed in various types of media and
devices; output media and devices vary in processing and requirements to
display the video. This factor afects your choice for the fps rate of your
video. It is obvious when producing video for TV broadcasting, as standards
for the electronic signal vary from one country to another. The most
commonly used standards worldwide for TV broadcasting are PAL and NTSC.
The NTSC standard is commonly used in North and South America and has a
29.97 fps speed standard; the PAL standard is commonly used in other in
other parts of the world, such as Europe and the Middle East, and has a
25 fps animation speed.
Another example that shows how the animation speed is afected by the
output device is the production of video animation for mobile devices, as the
mobile devices have low processing capabilities, which may limit their ability
to display large, high-quality video content.
Producing video content for the web is mostly concerned with the size of
the content and the bandwidth used to display this content. However, the
second issue we mentioned regarding how the fps rate afects the video
animation size should be kept in mind when creating video content for
the web.
Dimensions
The output of the video animation corresponds to the width and height of
the video ile. Video ile dimensions are diferent based on the type of ile
output. For instance, video iles that will be broadcast to TV using the NTSC
standard require the video ile dimensions to be 720 × 486 pixels, and the PAL
system requires the video dimensions to be 720 × 576 pixels.
Aspect Ratio
The aspect ratio is the ratio of the width and the height of the video ile and
concerns how it will display on monitors. Some monitors are square and
others are widescreen. When you create a new video ile, you can size it for
either square screens or widescreens. The square aspect ratio is similar to
the old computer monitors, which used to have resolutions of 800 × 600,