[Openexr-devel] Adding/updating attribute to existing OpenEXR file

[Nicholas Yue]

Hi,

   I am writing a tool to add custom attributes a collection of 
existing OpenEXR files.

   Looking at the API, I have found methods to retrieve the headers 
from the ImfRgbaFile object but they are const.

   What are the best practice way of updating/adding attributes to 
existing OpenEXR files?

Regards