On Sep 12, 2016, at 7:29 AM, Kevin Wheatley 
<kevin.wheat...@framestore.com<mailto:kevin.wheat...@framestore.com>> wrote:



On 12 September 2016 at 13:24, Howard Jones 
<how...@axis-vfx.com<mailto:how...@axis-vfx.com>> wrote:
Many thanks Kevin

I’m waiting tp hear what LUT they are using to convert to dpx with so I assum 
then I would plug that into the EXR section of your list.

typically on an ACES pipeline you would use an Input Device transform (IDT) to 
generate the initial ACES 2065-1 images, e.g. if you shot on Alexa then ARRI 
provides an IDT to convert from ARRI LogC to ACES, this would typically be used 
by the ingest house. There is no reason you should not do the same, the ACES 
OCIO config provides those transforms too.

Exactly. But what was means by “convert to DPX” by the OP? There is no DPX 
storage of ACES data; only OpenEXR storage of ACES data. There’s ADX storage of 
APD [Academy Printing Density] data, for ACES film-based workflows, but no DPX 
storage of the ACES RGB relative exposure values that you see in OpenEXR files.

What are the ‘Roles’ for? Are these presets?

roles are an OCIO feature used to select specific colour spaces for particular 
purposes, as an example in Nuke the log_compositing role is used to decide 
which log colour space to use for the OCIOLogConvert node.

Kevin
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