Instruction Manual

Chapter 26 Video and le formats 1054
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Apple ProRes 4444 (XQ): The highest-quality version of Apple ProRes for 4:4:4:4 image sources
(including alpha channels), with a very high data rate to preserve the detail in high-dynamic-
range imagery generated by today's highest-quality digital image sensors. Apple ProRes 4444
(XQ) preserves dynamic ranges several times greater than the dynamic range of Rec 709
imagery—even against the rigors of extreme visual eects processing, in which tone-scale
blacks or highlights are stretched signicantly. Like standard Apple ProRes 4444, this codec
supports up to 12 bits per image channel and up to 16 bits for the alpha channel. Apple
ProRes 4444 (XQ) features a target data rate of approximately 500 Mbps for 4:4:4 sources at
1920 x 1080 and 29.97 fps.
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Apple ProRes 4444: An extremely high-quality version of Apple ProRes for 4:4:4:4 image sources
(including alpha channels). This codec features full-resolution, mastering-quality 4:4:4:4 RGBA
color and visual delity that is perceptually indistinguishable from the original material.
Apple ProRes 4444 is a high-quality solution for storing and exchanging motion graphics
and composites, with excellent multigeneration performance and a mathematically lossless
alpha channel up to 16 bits. This codec features a remarkably low data rate compared to
uncompressed 4:4:4 HD, with a target data rate of approximately 330 Mbps for 4:4:4 sources
at 1920 x 1080 and 29.97 fps. It also oers direct encoding of, and decoding to, both RGB and
Y'C
B
C
R
pixel formats.
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Apple ProRes 422 (HQ): A higher-data-rate version of Apple ProRes 422 that preserves visual
quality at the same high level as Apple ProRes 4444, but for 4:2:2 image sources. With
widespread adoption across the video post-production industry, Apple ProRes 422 (HQ)
oers visually lossless preservation of the highest-quality professional HD video that a single-
link HD-SDI signal can carry. This codec supports full-width, 4:2:2 video sources at 10-bit
pixel depths, while remaining visually lossless through many generations of decoding and
reencoding. The target data rate of Apple ProRes 422 (HQ) is approximately 220 Mbps at
1920 x 1080 and 29.97 fps.
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Apple ProRes 422: A high-quality compressed codec oering nearly all the benets of Apple
ProRes 422 (HQ), but at 66 percent of the data rate for even better multistream, real-time
editing performance. The target data rate of Apple ProRes 422 is approximately 147 Mbps at
1920 x 1080 and 29.97 fps.
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Apple ProRes 422 (LT): A more highly compressed codec than Apple ProRes 422, with roughly
70 percent of the data rate and 30 percent smaller le sizes. This codec is perfect for
environments where storage capacity and data rate are at a premium. The target data rate of
Apple ProRes 422 (LT) is approximately 102 Mbps at 1920 x 1080 and 29.97 fps.
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Apple ProRes 422 (Proxy): An even more highly compressed codec than Apple ProRes 422 (LT),
intended for use in oine workows that require low data rates but full-resolution video. The
target data rate of Apple ProRes 422 (Proxy) is approximately 45 Mbps at 1920 x 1080 and
29.97 fps.
Note: Apple ProRes 4444 and Apple ProRes 4444 (XQ) are ideal for the exchange of motion
graphics media because they are virtually lossless, and are the only Apple ProRes codecs that
include alpha channel support to preserve transparency for later compositing.
Uncompressed 8-bit and 10-bit 4:2:2 video
These resolution-independent codecs are appropriate for all standard- and high-denition Y'C
B
C
R
video formats. Video stored using these codecs undergoes no data compression, but some color
resampling may occur depending on the source video format. Because compression usually
results in video artifacts, using no compression guarantees the highest level of quality, so this
codec is often used for video mastering when the absolute highest quality is required. This also
results in large le sizes.
67% resize factor