Some people are reporting this from time to time, but I'm not sure why this is happening. I have no possibility to turn this on or off.
On my side all options are there:
Vouk, do you have it appearing in the latest version of Resolve 18.5.1 for PC?
Do you think if we do a clean install of the Resolve, would that fix it?
THanks
Updating now ...
Edit: You're right. With the latest version these option won't show up. Seems it's a DVR issue.
dvr issue? Would it be a fix to be done by BlackMagic or on your side?
Vouk , We constantly use VOukoder to create all our prores like everyone and without the gamma option, it now encodes with a gamma 2.2 for the prores which is not what we are looking for
Thanks for your fast replies above 
edit: dah 'dvr' da vinci resolve.. ok. we should downgrade back until it's fixed on their side
This is still an issue with 18.6.5
I wrote a PM now to one of the DVR developers asking if this is a known bug.
Hopefully he gets back on me.
I had written to a DVR developer:
I think up to DVR 18.1.x it was possible on the Delivery Page to see and change the complete settings in the Advanced Settings section:
* Pixel Aspect Ratio
* Data Levels
* Color Space Tag
* Gamma Space Tag
* Data Burn-in
and so on
But from DVR 18.5.x upwards several important settings are missing now:
* Pixel Aspect Ratio* Data Levels* Color Space Tag* Gamma Space Tag
* Data Burn-in
and so on
Is this a bug or has something changed in the SDK how to get to those settings?
And a few days ago I got the answer:
Hi Robert
There are no changes to the SDK in this aspect.
Without looking at the Voukoder code, our most likely candidate is that the logic now includes a single hardcoded data levels value which Resolve interprets as a non-overridable data levels setting.
You can request the developers to consider:
• seting an empty vector to pIOPropDataRange to apply Resolve's Auto setting.
• setting a vector with both Video and Data options. The first value is taken as the default.
Reference: DaVinci Resolve Help Menu > Developer > CodecPlugin/Examples/x264_encoder_plugin/x264_encoder.cpp : line 424.
Hope that helps.
I hope that you can make anything out of this.
Robert Niessner Thanks! I'll look into it asap.
Did you have a chance to look into it?
I'm moving to a new city right now. I'll look into it as soon as I have time.
Alright, moving to my new place is 99% finished so let's have a look at this.
With DVR 18.6.4.6 everything looks good:
After updating to 18.6.5.7 (latest) ...
... it is still there.
I know these settings were gone the last time I checked this, but I can't reproduce it anymore.
Can you try again with 18.6.5.7?
I uploaded a new version 0.13.0. I added the code Robert Niessner s contact was mentioning (even though it was working for me now). Please try if it helps.
Thanks Youk, will try this on my non-productive system with DVR 18 (the productive one is still on DVR 17).
I can confirm it works now.
