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Press release : Academy Scientific and Technical Award Winning OpenColorIO Joins Academy Software Foundation

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Re: OCIO -> ASWF

Larry Gritz <l...@...>
 

He lives!


On Feb 8, 2019, at 12:08 PM, Jeremy Selan <jeremy...@...> wrote:

Congrats!

On Fri, Feb 8, 2019 at 12:05 PM Piotr Stanczyk <piotr.s...@...> wrote:
Congratulations on getting this through. Great work!



On Fri, Feb 8, 2019 at 10:57 AM Larry Gritz <l...@...> wrote:
Official announcement: https://www.aswf.io/ocio-joins-aswf/

--
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l...@...




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Re: OCIO -> ASWF

Jeremy Selan <jeremy...@...>
 

Congrats!


On Fri, Feb 8, 2019 at 12:05 PM Piotr Stanczyk <piotr.s...@...> wrote:
Congratulations on getting this through. Great work!



On Fri, Feb 8, 2019 at 10:57 AM Larry Gritz <l...@...> wrote:
Official announcement: https://www.aswf.io/ocio-joins-aswf/

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l...@...




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Re: OCIO -> ASWF

Piotr Stanczyk <piotr.s...@...>
 

Congratulations on getting this through. Great work!



On Fri, Feb 8, 2019 at 10:57 AM Larry Gritz <l...@...> wrote:
Official announcement: https://www.aswf.io/ocio-joins-aswf/

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OCIO -> ASWF

Larry Gritz <l...@...>
 

Official announcement: https://www.aswf.io/ocio-joins-aswf/

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Re: pyOCIO Windows compilation error against Python36

Richard Shaw <hobbe...@...>
 

I had completely forgotten that I moved the Fedora package over to Python 3.7 and haven't had any build issues... Now that being said I don't know if there's any consumers of the python library in Fedora...


Feel free to poke around the build logs...

Here's the spec file for building... Some of it won't make sense to you but you can review the settings / cmake options I use.


Thanks,
Richard


Re: pyOCIO Windows compilation error against Python36

Patrick Hodoul <patric...@...>
 

Hi Guys,

 

Thanks for your investigations around Python 3. 

 

OCIO does not currently support Python 3. But it would be appreciated to have a pull request fixing the Python 3 support   :-)

 

Patrick.

 


On Sunday, January 27, 2019 at 1:04:35 PM UTC-5, Richard wrote:
On Sun, Jan 27, 2019 at 12:05 AM <rena...@...> wrote:
I downloaded the latest OCIO code from GitHub (1.1.0) and I was able to compile OCIO using "Visual Studio 2015" as-well as pyOpenColorIO against Python27.

I checked online to see if I could figure out what's causing the issue but I couldn't figure it out. Anybody would know why this is happening ?
Was anyone able to compile OCIO 1.1.0 | Win64 | Visual Studio 2015 | Python36 (official 64 bit build) ?

My guess is that it hasn't been updated for Python3 yet... There are some incompatible changes.

You can try a converter and see if it takes care of the errors but beware any unintended side effects...


Thanks,
Richard 


Metadata (WAS: OCIO v2 January working group meeting)

Troy Sobotka <troy.s...@...>
 

First, an apology for igniting the naming debate. Second, a huge congrats on reaching consensus on the naming of the ExponentTransform and its sibling.

Part of me wants a PowerToe T shirt though...

On Mon, Jan 28, 2019 at 6:44 PM Doug Walker <Doug....@...> wrote:

TOPIC:  NEW COLORSPACE "CATEGORY" ATTRIBUTE  PR #648  (PR 7 days, but API/tests for 64 days)

-- Thomas pointed out the risk of these features not being implemented the same way (similar to roles).  The group agreed it was a useful feature but the standard list and intended behavior of the categories needs to be clearly documented.

I completely agree with this. From a UI construction point of view, and in accordance with the ISO’s additive RGB colorspace definition, is it feasible to enforce a bare minimum set of tags that might include:

1. TransferFunction
2. Chromaticity
3. AchromaticChromaticity

I ask because it is deadly tricky trying to implement OCIO v1 as a UI colour management system without some degree of clarity on certain transform classes and their undisclosed colorimetry. Being able to, for example, deduce the underlying chromaticities and separate them from both technical and aesthetic transfer functions is required for displaying UI elements correctly according to need. Attempting to do so with only a blind view transform is virtually impossible currently. 

Great work,
TJS


Re: pyOCIO Windows compilation error against Python36

Richard Shaw <hobbe...@...>
 

On Sun, Jan 27, 2019 at 12:05 AM <renau...@...> wrote:
I downloaded the latest OCIO code from GitHub (1.1.0) and I was able to compile OCIO using "Visual Studio 2015" as-well as pyOpenColorIO against Python27.

I checked online to see if I could figure out what's causing the issue but I couldn't figure it out. Anybody would know why this is happening ?
Was anyone able to compile OCIO 1.1.0 | Win64 | Visual Studio 2015 | Python36 (official 64 bit build) ?

My guess is that it hasn't been updated for Python3 yet... There are some incompatible changes.

You can try a converter and see if it takes care of the errors but beware any unintended side effects...


Thanks,
Richard 


Re: OCIO -> ASWF

Michael Johnson <drw...@...>
 

Congrats!

On Jan 16, 2019, at 3:27 PM, Larry Gritz <l...@larrygritz.com> wrote:

By unanimous vote of the Academy Software Foundation's Technical Advisory Council, OpenColorIO has been adopted into the organization as an official ASWF incubating project. (We graduate from "incubating" as we finish up some logistics over the coming weeks or months.)

Happy to see an exciting new chapter in OCIO development!

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l...@larrygritz.com




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Re: OCIO -> ASWF

Sebastian Sylwan <syl...@...>
 

Congratulations Larry! That is good news.

S

On Wed, Jan 16, 2019, 4:27 PM Larry Gritz <l...@... wrote:
By unanimous vote of the Academy Software Foundation's Technical Advisory Council, OpenColorIO has been adopted into the organization as an official ASWF incubating project. (We graduate from "incubating" as we finish up some logistics over the coming weeks or months.)

Happy to see an exciting new chapter in OCIO development!

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l...@...




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OCIO -> ASWF

Larry Gritz <l...@...>
 

By unanimous vote of the Academy Software Foundation's Technical Advisory Council, OpenColorIO has been adopted into the organization as an official ASWF incubating project. (We graduate from "incubating" as we finish up some logistics over the coming weeks or months.)

Happy to see an exciting new chapter in OCIO development!

--
Larry Gritz
l...@larrygritz.com


pyOCIO Windows compilation error against Python36

renau...@...
 

I downloaded the latest OCIO code from GitHub (1.1.0) and I was able to compile OCIO using "Visual Studio 2015" as-well as pyOpenColorIO against Python27.

However when I tried to compile it against Python36 I get the following error:

...

9>  PyLogTransform.cpp
9>  PyLook.cpp
9>  PyLookTransform.cpp
9>  PyMain.cpp
9>D:\Development\Libraries\src\ocio\src\bindings\python\PyMain.cpp(153): error C2059: syntax error: '__declspec(dllexport)'
9>D:\Development\Libraries\src\ocio\src\bindings\python\PyMain.cpp(154): error C2143: syntax error: missing ';' before '{'
9>D:\Development\Libraries\src\ocio\src\bindings\python\PyMain.cpp(154): error C2447: '{': missing function header (old-style formal list?)

9>  PyMatrixTransform.cpp
9>  PyProcessor.cpp
9>  PyProcessorMetadata.cpp
9>  Generating Code...
9>  Compiling...
9>  PyRangeTransform.cpp
9>  PyTransform.cpp
9>  PyUtil.cpp
9>  Generating Code...
========== Build: 8 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========


Line 153 points to this :

OCIO_NAMESPACE_EXIT

MOD_INIT(PyOpenColorIO)
{
   
PyObject * m;
    MOD_DEF
(m, OCIO_STRINGIFY(PYOCIO_NAME), OCIO::OPENCOLORIO__DOC__, PyOCIO_methods);


MOD_INIT definition looks like this:

pyMain.cpp

...
#if PY_MAJOR_VERSION >= 3
 
#define MOD_ERROR_VAL NULL
 
#define MOD_SUCCESS_VAL(val) val
  #define MOD_INIT(name) PyMODINIT_FUNC EXPORT_SYMBOL PyInit_##name(void)
 
#define MOD_DEF(ob, name, doc, methods) \
         
static struct PyModuleDef moduledef = { \
           
PyModuleDef_HEAD_INIT, name, doc, -1, methods, NULL, NULL, NULL, NULL}; \
          ob
= PyModule_Create(&moduledef);

pyMODINIT_FUNC is defined here:

PyUtil.h

...
       
/* module init functions outside the core must be exported */
#                       if defined(__cplusplus)
#                               define PyMODINIT_FUNC extern "C" __declspec(dllexport) PyObject*
#                       else /* __cplusplus */
#                               define PyMODINIT_FUNC __declspec(dllexport) PyObject*
#                       endif /* __cplusplus */

and EXPORT_SYMBOL here:

PyUtil.h

#ifdef WIN32
    #define EXPORT_SYMBOL _declspec(dllexport)
#else
   
#define EXPORT_SYMBOL
#endif


I checked online to see if I could figure out what's causing the issue but I couldn't figure it out. Anybody would know why this is happening ?
Was anyone able to compile OCIO 1.1.0 | Win64 | Visual Studio 2015 | Python36 (official 64 bit build) ?

Thanks.


Re: RV Linear > AlexaV3 > Lut Question

Deke Kincaid <dekek...@...>
 

What does “it looks horrible“ mean?  Perhaps providing an example image(Marcie)?  Have you tried the same conversation in Nuke with the same config.ocio and does it look different?

On Sat, Dec 8, 2018 at 10:30 <shaun...@...> wrote:
Hello OCIO 

Just tryin to do a simple conversion in RV
I have a LINEAR EXR that I want to take from Linear to AlexaV3LogC 
but when do this and then place on it, it looks horrible.

What am I doing wrong ?

Also exploring if I need to write a custom config for this operation ?

All I did was import the EXR > OCIO > Nuke Config > OCIO:Active > OCIO ---> Linear > [Now from here how can I get it to go from linear to AlexaV3LogC]
is my question so then I can apply a look over everything

Kind regards
SA

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RV Linear > AlexaV3 > Lut Question

shaun...@...
 

Hello OCIO 

Just tryin to do a simple conversion in RV
I have a LINEAR EXR that I want to take from Linear to AlexaV3LogC 
but when do this and then place on it, it looks horrible.

What am I doing wrong ?

Also exploring if I need to write a custom config for this operation ?

All I did was import the EXR > OCIO > Nuke Config > OCIO:Active > OCIO ---> Linear > [Now from here how can I get it to go from linear to AlexaV3LogC]
is my question so then I can apply a look over everything

Kind regards
SA


Re: Typical configuration files used

Simon Therriault <mos...@...>
 

Thanks for the info Sean.

On my side, it's more a question of how much data the typical configuration files relies on. For Aces, it's something like 70 LUTs and 270Mb of data. That's why I was wondering if it's a typical use case. I guess it could be both, since like you said, starting from scratch, is not the easiest path and the typical user won't want to spend much time fiddling with this. If what's available as is can do everything, then it's better to use it and be done with it.



On Thursday, November 22, 2018 at 1:02:13 PM UTC-5, Sean Cooper wrote:
Hello,

I'd honestly say it depends on the time you have and your grasp of what problems you're trying to solve.

In truth the larger hill of difficulty is from generating you're own luts and/or decomposing colorspaces into the relevant ocio transforms, since there isn't as much helpful tooling around this.

If you do go down the path of creating your own config from stratch (not merely culling the list of an existing one) I'd suggest using the API to generate your config. In my opinion there is no reason to be manually editing the YAML by hand.

On Thu, 22 Nov 2018, 5:23 pm Simon Therriault <mos...@... wrote:

Hi,

During my integration of the OCIO  library, I have mainly used the configuration files that can be obtained from the OCIO website, mainly nuke and Aces. I was wondering what is the typical use case by users of the library. Do people start from the Aces configuration and strip it down for what they need, do they start from scratch, do they keep the Aces configuration as is? 

I'd be interested to have your input on this!

Thanks 

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Re: Typical configuration files used

Sean Cooper <se...@...>
 

Hello,

I'd honestly say it depends on the time you have and your grasp of what problems you're trying to solve.

In truth the larger hill of difficulty is from generating you're own luts and/or decomposing colorspaces into the relevant ocio transforms, since there isn't as much helpful tooling around this.

If you do go down the path of creating your own config from stratch (not merely culling the list of an existing one) I'd suggest using the API to generate your config. In my opinion there is no reason to be manually editing the YAML by hand.

On Thu, 22 Nov 2018, 5:23 pm Simon Therriault <mos...@... wrote:

Hi,

During my integration of the OCIO  library, I have mainly used the configuration files that can be obtained from the OCIO website, mainly nuke and Aces. I was wondering what is the typical use case by users of the library. Do people start from the Aces configuration and strip it down for what they need, do they start from scratch, do they keep the Aces configuration as is? 

I'd be interested to have your input on this!

Thanks 

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Typical configuration files used

Simon Therriault <mos...@...>
 


Hi,

During my integration of the OCIO  library, I have mainly used the configuration files that can be obtained from the OCIO website, mainly nuke and Aces. I was wondering what is the typical use case by users of the library. Do people start from the Aces configuration and strip it down for what they need, do they start from scratch, do they keep the Aces configuration as is? 

I'd be interested to have your input on this!

Thanks 


Re: AllocationVars with GPU path and 1d LUT

Troy Sobotka <troy.s...@...>
 

It took me a bit of time mucking to get the allocation variables set properly.

If you set your allocation variables type to lg2, the math for the lower and
upper variable is the same as it is in an AllocationTransform, which is
log2(VALUE), which if you have stops as a reference is
log2(2^STOP_ADJUSTMENT * MIDDLE_GREY). For example, for
ten stops down with a middle grey peg at 0.18 it should be log2(2^-10 * 0.18).

For uniforms, it is value as-is, and they get normalized to and from including
negatives I believe, as per the example given in the documentation.

With respect,
TJS

On Fri, Nov 9, 2018 at 11:09 AM Simon Therriault <mos...@gmail.com> wrote:

Thanks for your answer Troy.

I started to play with the latest version with the revamped GPU path. I'll have to wait for the official release to integrate it though.

For now, I'll continue to see if I can get something out of the AllocationVars. From what I understand, the nuke default config is not necessarily the best to play with the GPU path. All the 1dLUT in play describes the to_reference transform. When I use them for inverse, the config as is clips the negative.



On Friday, November 9, 2018 at 1:42:14 PM UTC-5, Troy James Sobotka wrote:

There's two issues at work, both of which are important.

The first is the deeper GPU issue that the ever wise Mr. Hodoul has fixed with
the completely reworked GPU code path. That is a massive issue, and one that
is deeper than the simple allocation variables. This ends up in
potential posterization
in OCIOv1 given that the GPU transforms are collapsed into a single transform.

The allocation variables are important if you have a GPU path as well,
given that
the GPU path is a constricted set of values. As far as I have come to expect and
understand things, the allocation variables are required if _either side of the
transform has a scene referred range_. If your from_reference or to_reference
requires a transform into the scene referred domain, your allocation vars need
to be set according to the minimum and maximum values required, as per
type. If these aren't set correctly, the range you require may be
clipped off when
going to the GPU.

With respect,
TJS
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Re: AllocationVars with GPU path and 1d LUT

Simon Therriault <mos...@...>
 

Thanks for your answer Troy.

I started to play with the latest version with the revamped GPU path. I'll have to wait for the official release to integrate it though.

For now, I'll continue to see if I can get something out of the AllocationVars. From what I understand, the nuke default config is not necessarily the best to play with the GPU path. All the 1dLUT in play describes the to_reference transform. When I use them for inverse, the config as is clips the negative.



On Friday, November 9, 2018 at 1:42:14 PM UTC-5, Troy James Sobotka wrote:
There's two issues at work, both of which are important.

The first is the deeper GPU issue that the ever wise Mr. Hodoul has fixed with
the completely reworked GPU code path. That is a massive issue, and one that
is deeper than the simple allocation variables. This ends up in
potential posterization
in OCIOv1 given that the GPU transforms are collapsed into a single transform.

The allocation variables are important if you have a GPU path as well,
given that
the GPU path is a constricted set of values. As far as I have come to expect and
understand things, the allocation variables are required if _either side of the
transform has a scene referred range_. If your from_reference or to_reference
requires a transform into the scene referred domain, your allocation vars need
to be set according to the minimum and maximum values required, as per
type. If these aren't set correctly, the range you require may be
clipped off when
going to the GPU.

With respect,
TJS

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