Thanks for that info! This is harder than I imagined. Single image with many layers was much easier to code...
I'm also struggling with the added complication of roi != roi_full and
creating a blank image spec in anticipation of unknown amount of matte
channels about to be added.
I'm attaching 3 dummy EXRs: 1 RGB (the comp), 1 matte EXR with 2 matte
channels and another matte EXR with 2 additional matte channels.
Larry, would you mind terribly boiler-plating some Python code on to create
a single EXR with subimage 0 is RGB and subimage 1 is
matte01,matte02,matte03,matte04 (ie combining the channels of the 2 matte
EXRs).
Sorry for the lack of self sufficiency...
Best,
Jerome
On Mon, Feb 21, 2022 at 4:38 PM Larry Gritz <l...@larrygritz.com> wrote:
> OpenEXR "parts" are not fully general implementations of multi-image
> files. The parts need some attributes to be the same for all parts, and I
> think displaywindow is one of them.
>
> My procrastination paid off! There is no way I would have guessed that was
> your problem without the actual files you were using.
>
> -- lg
>
>
> On Feb 21, 2022, at 1:34 PM, Jerome Raim <jerome.r...@gmail.com> wrote:
>
> Did some more troubleshooting.
> out.open(out_filepath, (comp_buf.spec(), matte_buf.spec())) was returning
> False.
>
> So I printed out.geterror() and oiio flagged a displayWindow mismatch.
>
> So I'm on the road to figuring this out...
>
>
> On Mon, Feb 21, 2022 at 1:18 PM Jerome Raim <jerome.r...@gmail.com> wrote:
>
>> Hi everyone,
>> I'm sure it's just a syntax problem, but I'm unable to do the following:
>>
>> I have an {R,G,B} EXR and a {mattes.matte01, mattes.matte02} EXR.
>>
>> I want to create an EXR with 2 subimages. The RGB comp as img 0, the
>> mattes as (sub) img 1.
>>
>> I have my comp_buf and my mattes_buf and trying something like:
>>
>> out_filepath = '/tmp/exr.rexr'
>> out = ImageOutput.create (out_filepath)
>> out.open(out_filepath, (comp_buf.spec(), matte_buf.spec()))
>>
>> comp.write(out)
>> out.open(out_filepath, comp_buf.spec())
>> out.open(out_filepath, matte_buf.spec(), "AppendSubimage"))
>> matte_buf.write(out)
>>
>> out.close()
>>
>> Weirdly, supports("appendsubimage") returns false on the EXR. Am I not
>> declaring something properly?
>>
>> Best,
>> Jerome
>>
>>
>> _______________________________________________
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> Oiio-dev@lists.openimageio.org
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>
>
> --
> Larry Gritz
> l...@larrygritz.com
>
>
>
>
> _______________________________________________
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> Oiio-dev@lists.openimageio.org
> http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org
>
<<attachment: multipart_exr_pkg.zip>>
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