(python) Retrieving all file formats supported by OIIO

[MrLixm]

Hello,

I have been wondering how to retrieve a list of file formats supported by oiio, if possible formatted as file extensions. I would like to be able to discard file path input whose extension is not supported by OIIO and would need a constant where this information is stored.

I have tried searching the documentation and manage to find is_imageio_format_name() but :

• you still need to have a list of file formats int he first place, and validate them against this function
• this function seems to except "file format plugin name", instead of file extensions, ex is_imageio_format_name("exr") -> False

So it's not what I need.

I could then manually create my constant from parsing https://openimageio.readthedocs.io/en/latest/builtinplugins.html but I would like to avoid spending time to do it if something is already implemented.

Cheers.
Liam.

[MrLixm]

Never mind I found it 2minutes after opening this discussion by browsing the list of issues (#2901).

It seems I need to query an OIIO global attribute :

import OpenImageIO as oiio
oiio.get_string_attribute("extension_list")

That can then be converted to a dict like

import OpenImageIO as oiio
dict(
     [
         (extension.split(":")[0], extension.split(":")[1].split(","))
         for extension in oiio.get_string_attribute("extension_list").split(";")
     ]
 )