16x9

1
Media Composer 7.0 Color Management (LUTs)
Igor Ridanovic
2
Some new features in Media Composer 7.0

• LUT and CDL support
• FrameFlex
• AMA media management
• Background transcoding

3
Technology

• MXF, MOV are wrappers carrying encoded essence
  and metadata
• DNxHD, Prores are codecs
• RAW are camera manufacturer proprietary files

4
Technology

• AMA (Avid Media Access)
• LUT (Lookup Table)
• CDL (Color Decision List)
• Rec. 709 color space

5
Terminology

• Color modelan abstract primary color mixing
  principle
• Color spacespecific values for the primaries
• Color gamutunambiguous color set defined by the
  primaries
• Gammanonlinear encoding

6
Color gamut
PAR
7
Gamma
perceived brightness
recorded intensity
WolphramAlpha
linear light intensity
8
Device dependent colornumerical representation
Values are intrinsically tied to the device
R 255 G 255 B 000
R 255 G 255 B 000
sRGB color space (computer monitor)
mystery color space (some handheld device)
9
Device dependent color
R 205 G 012 B 005
R 205 G 012 B 005
device 1
source device
R 205 G 012 B 005
device 2
10
Device dependent color
R 205 G 012 B 005
source device
R ? G ? B ?
device 2
11
Device dependent color
CMS
R 205 G 012 B 005
source device
R 212 G 008 B 010
device 2
12
Project setup

• Y'CbCr422 chroma subsampling
• R'G'B' 444 sampling
• Both use 2.2 gamma

13
AMA plugins

• Plugins are provided by third party
  manufacturers
• Open console window CTRL6 or Command6
• Execute AMA_ListPlugins

14
Camera files link/import
15
Built-in scope and histogram operation
16
CDL (color decision list)
TITLE ONE EVENT CDL 001 Reel01 V C
10052914 10054308 01000000
01001318 ASC_SOP (1.000000 1.000000
1.000000)(0.000000 0.000000 0.000000)(1.000000
1.000000 1.000000) ASC_SAT 1.000000
Slope Offset Power
p
out (i x so)
17
Legacy files import

• Correct level settings
• New color options for AMA linked files
• FrameFlex

18
Legacy files import
19
How do popular programs color manage?
0
255
255
235
0
16
16
700 mV
0 mV
superblack
superwhite
20
How do popular programs color manage?
without dithering
with dithering
21
Special Thanks
James Mathers, Digital Cinema Society Matt Feury,
Avid Technologies Luc Amiot, Avid Technologies
Bojan Stanivukovich, T-Stop, Inc.,
Hollywood Schy Gleason, Clapping Trees Media
22
This presentation is available for download at
HDhead.com.