Mad props to Matty for getting this all working. ACES 1.0.3 with Arri sample footage in Olive. Impressed as hell.

Here's Olive working with EXR sequences from Blender's ToS project. For being horribly immature, experienced eyes will likely be blown away. #b3d

The popup didn't record, but that was me flipping from the generic sRGB EOTF to Filmic with base contrast enabled. So yes, fully managed and an entirely half float, scene referred working space for the offline internal processing. Online flips to 32 bit float.