When played back with a projector
with an anamorphic lens, the image is projected
at a width 2.35 times its height. On a standard TV,
the letterboxing would be more severe to avoid
cropping the sides.
Widescreen Film
(aka, Academy Flat)
Table 1.2
Standard Aspect
Ratios
4K Academy (4K is 4000 pixels
across)
2K Academy (2K refers to
2000 pixels across)
1K Academy (1K refers to
1000 pixels across)
NTSC D1 (National Television
System Committee)
Table 1.1
Typical Video
Resolutions
22 ?– chapter 1: Basic Concepts
The number of frames that are played back per second determines the frame rate of an
animation. This is denoted as fps, or frames per second. The three standard frame rates for
media are:
??? NTSC: 30fps
??? PAL: 25fps
??? Film: 24fps
Knowing what your final output medium is going to be before you begin your project
is pretty important. It is not crucial by any means, but knowing what the screen will look
like (i.e., whether it will be a small web window or a large television) will help you better
compose your scenes. You can always change your frame rate and render resolution later,
but it is much simpler to begin with it already worked out.
Playing back a 24fps animation at 30fps will yield a slower-moving animation and will
either require repeating some frames to fill in the gaps or ending the animation early.
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