Hmmm... it's not just "--ch", that image looks "black" (all 0.0 values) in all
channels to all OIIO tools. (For example, `oiiotool -stats test.png`) I'm
suspecting something in the reader rather than an issue with channel selection.
Looking into it.
-- lg
> On Feb 8, 2019, at 11:31 AM, Stephen Parker <[email protected]>
> wrote:
>
> Hi Larry,
>
> I'm on the release branch. Here is the PNG in question (attached).
>
> thanks
>
> On Fri, Feb 8, 2019 at 11:12 AM Larry Gritz <[email protected]
> <mailto:[email protected]>> wrote:
> Which version of OIIO?
> And I don't suppose you can send me an example PNG that has the problem? Or
> is it weird for every png you try?
>
>
>
>> On Feb 8, 2019, at 10:59 AM, Stephen Parker <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>> Hello,
>>
>> I'm having some trouble using oiiotool's copy channel operator. It might be
>> user error but I wanted to check and see if it's intended behavior. I've
>> only glanced at the code so far.
>>
>> My test image is a PNG (4-channel RGBA), but only has information in the
>> Alpha. When attempting to copy the Alpha into the other 3 channels and write
>> out an RGB image (no Alpha), I get black. Imagemagick's 'convert' did what I
>> expected.
>>
>> invoked as:
>>
>> oiiotool input.png --ch "R=A,G=A,B=A" -o output.png
>>
>> I also tried using the numeric channel labels to no avail.
>>
>> -sp
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>
> --
> Larry Gritz
> [email protected] <mailto:[email protected]>
>
>
>
>
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> <test.png>_______________________________________________
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--
Larry Gritz
[email protected]
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