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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.

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....)

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

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

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.

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.

Art Adams
 

>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

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.

Stuart Brereton
 


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


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.

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.

Art Adams
 

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

Seth Goldin
 

On Thu, Dec 7, 2017 at 10:02 PM Robert A. Ober <robob@...> wrote:
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.

I assure you that this is not the case.😉 I'm on Resolve every day, with XAVC footage almost every day.

There are all sorts of metadata in XAVC-I and XAVC-S that are not accessible in Resolve's Metadata panel, but those metadata are indeed available in Catalyst Browse and Catalyst Prepare.

Seth
--
S E T H   G O L D I N

Director of Production Technology and Workflow | Freethink 

phone: +1.757.739.5424
twitter: @sethgoldin

Robert A. Ober
 

On 12/18/17 12:56, Seth Goldin wrote:
On Thu, Dec 7, 2017 at 10:02 PM Robert A. Ober <robob@...> wrote:
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.

I assure you that this is not the case.😉 I'm on Resolve every day, with XAVC footage almost every day.

There are all sorts of metadata in XAVC-I and XAVC-S that are not accessible in Resolve's Metadata panel, but those metadata are indeed available in Catalyst Browse and Catalyst Prepare.

_____________________________________

Thanks Seth,  I appreciate the correction.

I might actually have to use Catalyst Browse occasionally.

I usually shoot Slog3/S-Gamut3.cine and don't usually have a problem in Resolve but I know getting footage from others can be a nightmare.

Have some good Holidays,
Robert
PS:  We should harass BMD about this.

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