If you're just renaming channels in order, this works:
oiiotool in.exr --chnames x,y,z -o out.exr
That should get you unstuck. (I don't remember exactly when --chnames was
added, sufficiently old versions may lack it.) Meanwhile, I'll look at --ch and
see if I can't figure out why that isn't working.
Note, however, that channel names work strangely in OpenEXR. There is no
canonical numerical order in exr, other than alphabetical by channel name. But
OIIO says that on the app side of an API, RGBAZ always come first, so OIIO will
reorder the presentation of channels for you (though not their actual order in
the file). So, oddly, if you "oiiotool -info -v out.exr" in the example above,
it will report channels "z, x, y". Because it thinks Z is depth, and puts it
before "other things it doesn't recognize". So just beware of this, it's saving
the file correctly, but your particular choice of channel names is defeating
the presentation heuristic that is almost always preferable to alphabetical
order.
> On Jan 22, 2016, at 2:42 PM, Larry Gritz <[email protected]> wrote:
>
> Never mind. I can reproduce this. Hang on...
>
>
>
>> On Jan 22, 2016, at 2:33 PM, Larry Gritz <[email protected]> wrote:
>>
>> Is it still a problem in 1.6 and/or master?
>>
>>
>>> On Jan 20, 2016, at 11:12 PM, Daniel Flood <[email protected]>
>>> wrote:
>>>
>>> Hi folks,
>>>
>>> I'm trying to use oiiotool to take an rgb exr, and change the channel names
>>> to some arbitrary value, while preserving compression type and header
>>> metadata.
>>>
>>> I tried this, and noticed different results in oiio 1.2 and 1.5. in.exr is
>>> a rgb exr.
>>>
>>> oiiotool in.exr --ch "x=R,y=G,z=B" -o out.exr
>>>
>>> In 1.2, this creates an empty exr with the correct channel names (ie xyz),
>>> but no image. In 1.5 it creates the image, but the channels are RGB.
>>>
>>> Can someone point me in the right direction for this? The reason is
>>> interfacing with external software which expects channel names to be
>>> certain values.
>>>
>>> cheers,
>>> Dan
>>>
>>>
>>
>> --
>> Larry Gritz
>> [email protected]
>>
>>
>> _______________________________________________
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>> http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org
>
> --
> Larry Gritz
> [email protected]
>
>
> _______________________________________________
> Oiio-dev mailing list
> [email protected]
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--
Larry Gritz
[email protected]
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