[Bf-committers] DPX specs

[Ton Roosendaal]

Hi,

Further tests reveiled that it didn't work for float buffers.
The problem is that linear color treatment is not solid yet, sometimes  
things convert (on anim render) and sometimes not (F12), or on load,  
but not on save, that crap...

Will hack here quickly something for further checks in the lab.

-Ton-

------------------------------------------------------------------------
Ton Roosendaal  Blender Foundation   ton at blender.org    www.blender.org
Blender Institute   Entrepotdok 57A  1018AD Amsterdam   The Netherlands

On 23 Aug, 2010, at 13:23, Ton Roosendaal wrote:

> Hi,
>
> I've found it, changing the gamma in the header to 1.0 loads correctly
> in Arri software, and on my mac on GraphicConverter. Will commit this
> as default.
>
> -Ton-
>
> ------------------------------------------------------------------------
> Ton Roosendaal  Blender Foundation   ton at blender.org     
> www.blender.org
> Blender Institute   Entrepotdok 57A  1018AD Amsterdam   The  
> Netherlands
>
> On 22 Aug, 2010, at 23:08, Diego B wrote:
>
>> Hi,
>>
>> I remember some problems like this before, on the studio. I will  
>> check
>> my code for 2.4x to see what I change in that moment (long time since
>> I work with dpx).
>>
>> - Diego
>>
>>
>> On Sun, Aug 22, 2010 at 11:21 AM, Campbell Barton <ideasman42 at gmail.com
>>> wrote:
>>> On Sun, Aug 22, 2010 at 8:55 PM, Ton Roosendaal <ton at blender.org>
>>> wrote:
>>>> Hi,
>>>>
>>>> Anyone on this list using DPX in commercial software? We have to
>>>> deliver the Sintel frames to the film lab, and they claim that  
>>>> their
>>>> software expects linear color in DPX files to have a gamma 2.2
>>>> applied.
>>>>
>>>> Blender DPX safes currently linear (straight float -> fixed point
>>>> int)
>>>> but in the header of the dpx file it sets a gamma value of 1.7.
>>>> Probably confusing...
>>>>
>>>> Some experience from the field is welcome :)
>>>>
>>>> Thanks,
>>>>
>>>> -Ton-
>>>
>>> note: the UI for DPX in 2.5 currently does nothing,
>>> see cineon_dpx.c -> cineon_conversion_parameters() to change values.
>>>
>>> --
>>> - Campbell
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