Thanks for your answer !
I think my question is mostly about getting the input (png) in the expected state.
So (according to a few contacts of mine) I would need to do the following to convert my file :
- normalize
- convert gamut to Rec.709
- apply sRGB OECF
(Normalize as in expose down until the maximum value in your exr is equal to 1.0. A 16 bit png is an integer data type and therefore does not support pixel values greater than 1.0.)
I will try that as soon as possible. Thanks !