On Oct 4, 2018, at 4:45 PM, Deke Kincaid <[email protected]> wrote:
>
> Two questions
>
> 1. Is there a special way to print/extract out all metadata from a raw file
> via oiiotool? I am trying to use oiiotool —info -v blah.cr2 but I am getting
> 1/8th the data that exiftool is giving me. I am using oiio 1.8.10 btw.
Yes, `oiiotool -info -v` is supposed to be the way to print all the metadata.
I did recently enhance the raw reader's handling of camera metadata, which I
think is only in master and not 1.8, and also libraw itself improves from
version to version (and I think some of the ways to pull out metadata from its
API only work for more recent versions).
Aside: `oiiotool --help` will, at the very bottom, tell you the versions of all
the dependent libraries, so that's one way to see which version of libraw is
built into your oiiotool.
Is it possible for you to build the current OIIO master, making sure that you
are building against a fairly current libraw (at least 0.18) and give a try?
If the oiio master + libraw >= 0.18 are still not finding the metadata you are
interested in, then I would be very happy to receive a cr2 from your camera to
see what I can fix in oiio to make it get the data you need. Doesn't have to be
proprietary show data, just snap a picture with the lens cap on for all I care,
I just want the intact file with all the original raw metadata as written by
the camera.
> 2. When converting to an openexr, is there an expectation of it writing all
> the metadata from the raw file to an openexr?
Yes, I believe that
oiiotoool in.cr2 -o out.exr
ought to shove all the metadata into the exr header. Again, it depends on
whether it's reading it correctly and fully from the cr2 in the first place.
Also note that I believe that if you don't give it any extra hints, the
underlying libraw will debayer the data into sRGB color space, so if you want
your exr file to be linear response or in a different color space, then you
might want something like
oiiotool in.cr2 -colorconvert srgb lnh -o out.exr
I'm kind of pretending here that srgb and lnh are color spaces your OpenColorIO
config knows about.
--
Larry Gritz
[email protected]
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