• Adobe After Effects

  S-log

  Posted by Stig Olsen on September 27, 2011 at 1:35 pm

  Hi,

  I shot a commercial with the Sony F3s S-log. (pro res)
  When I link it through AMA (Avid) it looks like the gamma are correct, more flat like 709.
  When I instead drag the file into after effects, it looks more contrasty – more like RGB.

  Any experience on that?

  Stig

  Stig Olsen replied 14 years, 7 months ago 3 Members · 8 Replies
• 8 Replies

• 

  Brian Charles

  September 27, 2011 at 2:22 pm

  Are you using a colour managed workflow?

  If not colours will not appear correctly in After Effects.

  See:

  https://help.adobe.com/en_US/aftereffects/cs/using/WS14AC4DDE-84D7-4fc9-B79C-897F2C78EA29a.html
• 

  Walter Soyka

  September 27, 2011 at 2:23 pm

  You can use the Cineon Converter effect to move S-log to linear. The correct parameters are in the Sony S-Log Whitepaper [link].

  Walter Soyka
  Principal & Designer at Keen Live
  Motion Graphics, Widescreen Events, Presentation Design, and Consulting
  RenderBreak Blog – What I’m thinking when my workstation’s thinking
  Creative Cow Forum Host: Live & Stage Events
• 

  Stig Olsen

  September 27, 2011 at 2:27 pm

  Hi,

  I did go inte project files and choose some different color spaces, but it doesnt change how I see the picture. Its still as contrasty as before. Any ide?
• 

  Stig Olsen

  September 27, 2011 at 2:38 pm

  Thanx, I tried the converter but it only gave me a black picture when the parameters were set?

  Cineon Parameter
  10 bit code
  Conversion Type
  Log To Linear
  10Bit Black Point
  90 (REF BLACK)
  Internal Black Point
  0 (MIN CODE)
  10Bit White Point
  636 (REF WHITE)
  Internal White Point
  255 (MAX CODE. 255 for 8bit)
  Gamma
  2.96 (when Monitor gamma is 2.2) (1.345 x A for Monitor gamma A)
  Highlight Rolloff
  120
• 

  Stig Olsen

  September 27, 2011 at 2:49 pm

  Btw, I have set the output and project profile to 709.
  When I try to interpret the file for assigning profile, the options is greyed out. Why is that happening?

  Thanks for your answers.

  Stig
• 

  Stig Olsen

  September 27, 2011 at 3:06 pm

  And one more thing.
  Its shot in prores 422 (ycbcr601) if that is important.

  Looks flat (or as it should be I guess) in avid using AMA, but has a very high contrast in After effects.
• 

  Walter Soyka

  September 27, 2011 at 4:28 pm

  [stig olsen] “When I try to interpret the file for assigning profile, the options is greyed out. Why is that happening?”

  I don’t think you can override embedded profiles.

  However, you could use the Color Profile Converter effect [link]. Maybe linearizing the input profile will help?

  Walter Soyka
  Principal & Designer at Keen Live
  Motion Graphics, Widescreen Events, Presentation Design, and Consulting
  RenderBreak Blog – What I’m thinking when my workstation’s thinking
  Creative Cow Forum Host: Live & Stage Events
• 

  Stig Olsen

  September 30, 2011 at 6:08 pm

  Ok,

  Then what you guys are telling me, is that there really dont exist a good enough support of S-log in AE.
  If AE cant read the files correctly, but gives me a high contrast look / RGB-look, this is just not good enough.

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