This is due to an issue with the dpxWriter’s knobs. Specifically, the 
'transfer' knob that is returned by the node’s .knob() method or __getitem__ 
lookup is actually an Obsolete_Knob, so it just eats any value you try to set 
on it (logged with The Foundry as bug 28372).

In order to grab the real 'transfer' knob, you have to look it up in the 
knobs() dict:

w = nuke.nodes.Write(file_type='dpx', colorspace='sRGB')
w.knobs()['transfer'].setValue('log')

-Nathan



From: Julik Tarkhanov 
Sent: Monday, January 28, 2013 7:35 AM
To: Nuke user discussion 
Subject: Re: [Nuke-users] Scripting question

I think it's because you are passing a dict of node knob values and they are 
applied in an undefined order, so once you change the "format" or such 
the transfer gets overridden (even though you've set it to something 
previously). Your best bet would be to set them one by one to make sure that 
they do not override each other (set the file type first, and then the rest 
would by my guess).

On 28 jan. 2013, at 16:02, Bolaf at SHED <[email protected]> wrote:


  Once the script is rolled, the resulting WRITE Node still is at transfer: 
"auto detect"...  ignoring the transfer="log" in my lines.


-- 
Julik Tarkhanov | HecticElectric | Keizersgracht 736 1017 EX
Amsterdam | The Netherlands | tel. +31 20 330 8250
cel. +31 61 145 06 36 | http://hecticelectric.nl 



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