[FEATURE REQUEST] RAW: Ability to read the embedded thumbnails of raw files.

[JenusL]

Is your feature request related to a problem? Please describe.
Most RAW-files have embedded thumbnails in them. It's currently not possible to access them with OIIO.

Describe the solution you'd like
It would be super useful to be able to access them.

Describe alternatives you've considered
Using LibRaw directly, one can access them with the command line tool simple_dcraw.

Additional context
In LibRaw, you can get the highest resolution thumbnail with the command line tool simple_dcraw -v -e raw_file.cr2
or you can get all the thumbnails with simple_dcraw -v -E raw_file.cr2
So look at simple_dcraw for inspiration.

[stevencaron]

Subscribing to this...

I have been using rawpy python module (Cython bindings for LibRaw) which is great, but would like to stick with one API, one set of dependencies for each library. (LibRaw version for OIIO vs rawpy).

[stevencaron]

@JenusL Looks like it's just waiting on one of us to do it :)

OpenImageIO/src/raw.imageio/rawinput.cpp

Line 903 in ae8aa8f

// FIXME -- thumbnail possibly in m_processor->imgdata.thumbnail