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Table Of Contents
Working with Effects in HD and in Progressive Frame Projects
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Working with Effects in HD and in Progressive Frame
Projects
Many video effects work the same way regardless of the project type or video format. This topic
describes several situations where effect behavior varies depending on whether a project is SD or
HD, or is interlaced or progressive.
Effects Considerations for HD Projects
Effects that use square geometry automatically use the correct pixel aspect ratios. These effects
include Titles, Box Wipes, and certain paint modes like Mosaic. Effects such as Color
Correction, Color Effect, and Luma keys automatically use the correct color space (ITU-709 for
HD).
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The Safe Color Limiter effect converts from 709 to 601 color space before limiting unsafe colors,
and then converts back to 709 color space. For more information, see “Understanding the Safe
Color Limiter Effect” on page 838.
Note the following:
You do not need to generate 4:3 media for titles.
Timewarp effects use a 60p input and output format in 720p/59.94 projects.
Effects Considerations for Progressive Frame Projects
Effects in progressive frame projects are frame based rather than field based, so their normal
behavior is slightly different from effects in interlaced projects. In particular, temporal artifacts
might appear in some effects under certain circumstances. This topic explains when temporal
artifacts might appear and suggests ways to create effects that do not show perceptible temporal
artifacts.
Effects that do not involve any movement across the screen — for example, masks, Color
Effects, and dissolves — always look the same in progressive projects as they do in interlaced
projects.
Effects that involve movement across the screen — for example, wipes, 3D shapes, or moving
titles — might look different in 24p or 25p projects from their equivalents in interlaced projects
for the following reasons:
Because the effect uses 24 or 25 progressive frames per second (24p or 25p), motion across
the screen is interpolated in 24 or 25 increments per second. (Contrast the 50 increments per
second for a PAL interlaced project or the 60 increments per second for an NTSC interlaced