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Re: Vectorscopes of various cameras

Art Adams <art.cml.only@...>
 


Red is slightly off in all cameras?

Without seeing parade RGB or what the chart looked like it's hard to know if the cameras are perfectly white balanced.

The Alexa red is a little on the cool side, which is what I would expect, but the Canons and Sonys are as well. Canon reds often lean toward yellow/green, so that seems odd. Sony reds are neutral to warm. My guess is the light source was a little cooler than the cameras were expecting.

Based on the linear smeariness around blue in all cameras I'm guessing this was a roughly tungsten light source.
 
Cyan is not able to get to a saturation point in the Sonys?

We have no idea if the scopes have any gain applied. Geoff says he took the saturation down to .85 or something like that. And cameras never put cyan in the target. My guess is that, like human vision, there's not enough overlap between the dyes to saturate it much.

Also, modern cameras don't put the colors near the boxes anyway as that's way too saturated for modern tastes. Sonys will in Rec 709 mode, but nobody uses that. (I hope nobody uses that.)

The F55 and F65 look very wrong. There's no way that much smear in blue would result in acceptable images. I've never seen that before. It's got to be an error somewhere.

--
Art Adams
Director of Photography
San Francisco Bay Area


Vectorscopes from Prelight

Geoff Boyle
 

Same as before but from Prelight this time. In reverse order.
Varicam, Helium, F65, F55, C700, Alexa-SXT


Cheers
Geoff Boyle
Cinematographer
EU Based
www.gboyle.co.uk
+31 (0) 637 155 076


Frames from PreLight

Geoff Boyle
 

Once again, matched exposures and saturation in ACES but in Prelight this time. Normal IDT, contrast .85


Cheers
Geoff Boyle
Cinematographer
EU Based
www.gboyle.co.uk
+31 (0) 637 155 076


Re: Vectorscopes of various cameras

Nick Shaw
 

On 11 Dec 2017, at 07:46, Geoff Boyle <geoff.cml@...> wrote:

In ACES in Resolve with just the relevant IDT applied, contrast set to .85 and colour centred with offset.

I have always thought that there was an issue with the S-Log3 IDT in Resolve (and reported it to the Resolve team) which results in the skew you see on the F55 and F65 vectorscope images. I have converted the official Sony S-Gamut3.CIne/S-Log3 IDT into DCTL (see here on my website) and using this does not show the same skew.

Geoff, I will send you my DCTL off list so you can compare.

Nick Shaw
Workflow Consultant
Antler Post
Suite 87
30 Red Lion Street
Richmond
Surrey TW9 1RB
UK

+44 (0)20 8892 3377
+44 (0)7778 217 555


Re: Vectorscopes of various cameras

Argyris_Theos_cml
 

Something does not make sense: 
Red is slightly off in all cameras?
Cyan is not able to get to a saturation point in the Sonys?
?

Argyris Theos, gsc 
DoP, Athens Greece,
+306944725315
Skype Argyris.Theos
via iPhone

11 Δεκ 2017, 9:46 π.μ., ο/η "Geoff Boyle" <geoff.cml@...> έγραψε:

These are from matching frames from the July tests.

In ACES in Resolve with just the relevant IDT applied, contrast set to .85 and colour centred with offset.

Alexa SXT, C300-2, C700, F55, F65, Varicam

<Alexa_SXT.png><Canon_C300-2.png><Canon_C700.png><Sony_F55.png><Sony_F65.png><Varicam.png>


Cheers
Geoff Boyle
Cinematographer
EU Based
www.gboyle.co.uk
+31 (0) 637 155 076



Now with saturation levels matched

Geoff Boyle
 

The same settings as in the vector scope test but now with saturation levels matched to the Alexa.


Cheers
Geoff Boyle
Cinematographer
EU Based
www.gboyle.co.uk
+31 (0) 637 155 076


Vectorscopes of various cameras

Geoff Boyle
 

These are from matching frames from the July tests.

In ACES in Resolve with just the relevant IDT applied, contrast set to .85 and colour centred with offset.

Alexa SXT, C300-2, C700, F55, F65, Varicam




Cheers
Geoff Boyle
Cinematographer
EU Based
www.gboyle.co.uk
+31 (0) 637 155 076



Re: Wondering if Sony Catalyst Browse lists SGamut/SLog2 as "User defined curve9"

Art Adams <art.cml.only@...>
 

I've played with LAB in Photoshop and created some very cool looks with color contrasts. I didn't know it was in Resolve, although I'd long wondered why this wasn't a secret colorist tool. Maybe it was and I wasn't worthy of the secret. :) Thanks!

--
Art Adams
Director of Photography
San Francisco Bay Area


Re: Wondering if Sony Catalyst Browse lists SGamut/SLog2 as "User defined curve9"

Benjamin Packer
 

Can confirm the LAB trick - I’ve used that a bit before. Great for playing with saturation without skin tones going crazy. Thanks for tip on LUTCalc, looks like a very handy little tool. 

Benjamin Packer
EU Number: +491745419365
AU Number: +61447181032
skype: benpacker.au



On 8 December 2017 at 4:02:42 am, Robert A. Ober (robob@...) wrote:

On 12/7/17 15:15, Seth Goldin wrote:
On Thu, Dec 7, 2017 at 2:23 PM Robert A. Ober <robob@...> wrote:
I have an FS7 but never user Catalyst Browse.  What does Resolve say?

Unfortunately it seems that Sony is somewhat opaque when it comes to any API for XAVC, so I don't believe Resolve has any such access to reading metadata from the files. As far as I know, Catalyst programs like Browse or Prepare provide the only way to read the metadata.

_________________________________

Last time I tried it Resolve was able to read it fine.  Click on a clip and go to Inspector and make sure it is showing everything.

Glad you got a workflow.

Y'all be cool,
Robert


Robert A. Ober
IT Consultant, Vidcaster, & Freelancer
www.infohou.com
Houston, TX



--
Folks,
Please be aware that I am not always watching email so text me
or go old school and call me at 281-772-3596 if you need help within a few hours.


Re: Wondering if Sony Catalyst Browse lists SGamut/SLog2 as "User defined curve9"

Robert A. Ober
 

On 12/7/17 15:15, Seth Goldin wrote:
On Thu, Dec 7, 2017 at 2:23 PM Robert A. Ober <robob@...> wrote:
I have an FS7 but never user Catalyst Browse.  What does Resolve say?

Unfortunately it seems that Sony is somewhat opaque when it comes to any API for XAVC, so I don't believe Resolve has any such access to reading metadata from the files. As far as I know, Catalyst programs like Browse or Prepare provide the only way to read the metadata.

_________________________________

Last time I tried it Resolve was able to read it fine.  Click on a clip and go to Inspector and make sure it is showing everything.

Glad you got a workflow.

Y'all be cool,
Robert


Robert A. Ober
IT Consultant, Vidcaster, & Freelancer
www.infohou.com
Houston, TX



-- 
Folks, 
Please be aware that I am not always watching email so text me
or go old school and call me at 281-772-3596 if you need help within a few hours.


Re: Wondering if Sony Catalyst Browse lists SGamut/SLog2 as "User defined curve9"

Stuart Brereton <ssbrereton17@...>
 


On Dec 7, 2017, at 1:10 PM, Seth Goldin <seth@...> wrote:

 I created my own custom curve in Resolve. I had been hoping for a quick and easy LUT for dailies like the SGamut3.cine/SLog3 to LC709A, but a custom curve with some LAB color contrast expansion sufficed.
_._,_._,

I’ve used LUTCalc to create an SLog3 to LC709A LUT in the past. With the various customization features it has, it’s very simple to add a gamma tweak.

Stuart Brereton
DP, LA



Re: Wondering if Sony Catalyst Browse lists SGamut/SLog2 as "User defined curve9"

Seth Goldin
 

On Thu, Dec 7, 2017 at 4:59 PM Art Adams <art.cml.only@...> wrote:
Is that LAB as in the color space?

Yes indeed! Since a quick LUT wasn't possible, I have two go-to adjustments for quick dailies.

To get log gamma back to something looking good at 2.4, I finessed a custom curve in regular "YRGB" space, just with all four channels linked.

Then, to pull the chrominance out for an SGamut source to a 709 target, I switch to LAB color space and then just finesse the "A" and "B" curves. By doing this, you get a lot more control than just cranking the Saturation control in YRGB.

I picked this up from Patrick Inhofer. He has a great series on this over at Mixing Light.


Re: Wondering if Sony Catalyst Browse lists SGamut/SLog2 as "User defined curve9"

Art Adams <art.cml.only@...>
 

>a custom curve with some LAB color contrast expansion sufficed.

Is that LAB as in the color space?

--
Art Adams
Director of Photography
San Francisco Bay Area


Re: Wondering if Sony Catalyst Browse lists SGamut/SLog2 as "User defined curve9"

Seth Goldin
 

On Thu, Dec 7, 2017 at 2:23 PM Robert A. Ober <robob@...> wrote:
I have an FS7 but never user Catalyst Browse.  What does Resolve say?

Unfortunately it seems that Sony is somewhat opaque when it comes to any API for XAVC, so I don't believe Resolve has any such access to reading metadata from the files. As far as I know, Catalyst programs like Browse or Prepare provide the only way to read the metadata.


Re: Wondering if Sony Catalyst Browse lists SGamut/SLog2 as "User defined curve9"

Seth Goldin
 

On Thu, Dec 7, 2017 at 2:23 PM Steven Gruen <scgruen@...> wrote:
In theory, a "user defined curve" is just that - something the user created with a program (Catalyst Browse for example) or downloaded from someone who did and then loaded it into the camera. Without a more descriptive name, I'm not sure if it is identifiable beyond that through some sort of reverse engineering.

Thanks for this. A clue was that the "Monitoring descriptions" listed SLog2. Regardless, I created my own custom curve in Resolve. I had been hoping for a quick and easy LUT for dailies like the SGamut3.cine/SLog3 to LC709A, but a custom curve with some LAB color contrast expansion sufficed.


Re: Wondering if Sony Catalyst Browse lists SGamut/SLog2 as "User defined curve9"

Robert A. Ober
 

On 12/6/17 14:14, seth@... wrote:
Hi folks,

I instructed a shooter with an FS7 to shoot in SGamut3.cine/SLog3, but I'm almost certain that the footage I got back is SGamut/SLog2.

Catalyst Browse is telling me that the capture gamma is User defined curve9. How cryptic!

Can anyone confirm that User defined curve9 is indeed SGamut/SLog2?
_________________________________

I have an FS7 but never user Catalyst Browse.  What does Resolve say?

Robert A. Ober
IT Consultant, Vidcaster, & Freelancer
www.infohou.com
Houston, TX


Re: Wondering if Sony Catalyst Browse lists SGamut/SLog2 as "User defined curve9"

Steven Gruen
 

In theory, a "user defined curve" is just that - something the user created with a program (Catalyst Browse for example) or downloaded from someone who did and then loaded it into the camera. Without a more descriptive name, I'm not sure if it is identifiable beyond that through some sort of reverse engineering.

Steven Gruen
Director/Cameraman
Paris, France


Re: Wondering if Sony Catalyst Browse lists SGamut/SLog2 as "User defined curve9"

George Hupka
 


 As I recall, in addition to the standard set of gammas the FS7 allows you to load custom gamma curves.  "User defined curve 9" would seem to be one of those...

(If there's no signature it means I have the signature screwed up on the web interface....)


Wondering if Sony Catalyst Browse lists SGamut/SLog2 as "User defined curve9"

Seth Goldin
 

Hi folks,

I instructed a shooter with an FS7 to shoot in SGamut3.cine/SLog3, but I'm almost certain that the footage I got back is SGamut/SLog2.

Catalyst Browse is telling me that the capture gamma is User defined curve9. How cryptic!

Can anyone confirm that User defined curve9 is indeed SGamut/SLog2?

Thanks,
Seth Goldin
Washington, D.C.


Re: Dolby Vision and HDR

Carroll, Robert
 

https://www.dolby.com/us/en/experience/dolby-atmos/bluray-and-streaming.html

 

 

 

From: <cml-raw-log-hdr@groups.io> on behalf of Bob Kertesz <bob@...>
Reply-To: "cml-raw-log-hdr@groups.io" <cml-raw-log-hdr@groups.io>
Date: Wednesday, November 29, 2017 at 6:31 PM
To: "cml-raw-log-hdr@groups.io" <cml-raw-log-hdr@groups.io>
Subject: Re: [cml-raw-log-hdr] Dolby Vision and HDR

 

Hello, Robert. I have a question about Dolby Vision.

Can you point out a streaming series or two on Netflix (only streaming service I have) or any UHD Blu Rays that you/Dolby consider to be noteworthy examples of the use of Dolby Vision? I have a calibrated LG 65E6 set on which to display them.

Thanks.

-Bob

Bob Kertesz
BlueScreen LLC
Hollywood, California

DIT, Video Controller, and live compositor extraordinaire.

High quality images for more than four decades - whether you've wanted them or not.©

* * * * * * * * * *

On 11/29/2017 4:31 AM, Carroll, Robert wrote:

Dirk,

Ian Lowe in Dolby’s Soho office is the contact for you. He is copied here.

 

You can get an on-line tutorial of the Dolby Vision mastering workflow here:

https://vimeo.com/182019060

 

I’m also glad to answer any questions you have. On CML or off!

 

Regards,

 

Robert Carroll

Senior Director

+1 317 418 8778

 

www.Dolby.com

 

 

From: <cml-raw-log-hdr@groups.io> on behalf of "generalstuff69@..." <generalstuff69@...>
Reply-To: "cml-raw-log-hdr@groups.io" <cml-raw-log-hdr@groups.io>
Date: Tuesday, November 28, 2017 at 11:59 PM
To: "cml-raw-log-hdr@groups.io" <cml-raw-log-hdr@groups.io>
Subject: [cml-raw-log-hdr] Dolby Vision and HDR

 

hi
im trying to get my head around Dolby Vision and understanding the differences between Dolby Vision and HDR, what the pros and cons are, and the fundamental differences. I’m aware that Dolby Vision utilises HDR but if there are any links that may explain further and clearly I’d appreciate a heads up.
many thanks

dirk Nel DOP
www.dirknel.com
london based

 

1961 - 1980 of 1983