As Gilda Radner use to say "NEVERMIND!!!" I found Arri LogC to 709 LUT in the pulldown menu. In yesterdays flurry to get something out we missed those choices at the bottom.
One thing that adds to my confusion is how the top Source Color Transform has no effect on a clip unless it is ama linked. My understanding, correct me if I have this wrong, is that with my preferences set in Color Management to auto apply the Color Transforms when I link ama to Arri media Avid will apply the Color Transform Arri LogC to Rec 709 and the image looks basically full range. Now when transcoding that to DNX if I check the color transform box it will bake the LUT into the transcoded media. If I want to keep my options open it leaves the media at LogC levels and flags the clip that it needs the Color Transform.
If I choose the latter then I can remove the LUT later but how is that LUT applied to the transcoded media? Is it the top choice in the Color Transform at the top of source settings or is it the bottom choice where you add or delete the various LUTs? I'm assuming it would be coming from the bottom section given I can't see any effect from the Top Color Transform setting on clips that have already been transcoded.
---In avid-l2@yahoogroups.com, <bigfish@...> wrote :
Would the choice of Project, Shared or Both when importing a LUT have an effect on seeing it as a choice with the Color Lut effect?
I will have to go back and check the system I was on yesterday.
---In avid-l2@yahoogroups.com, <cutandcover@...> wrote :
On Wed, Apr 13, 2016 at 11:09 PM, bigfish@... [Avid-L2] <Avid-L2@yahoogroups.com> wrote:That's a great link. It raises all kinds of questions as to what would best resemble the performance of the Arri LogC to Rec 709 I'm use to applying in Resolve. I use the 3D LUT in Resolve and it gives me a nice starting point when baking out Avid DNX.
As I google around there are suggestions that 1D LUTs are better if not changing color space. I had always used the 3D LUT because I thought it was more accurate but honestly I'm not aware of all the subtle differences. I had never thought about what color space the Arri was shooting but I assumed LogC was a different color space than Rec 709 but now I'm wondering. I just want to undo the LogC back to Rec 709 so is that better with a 1D or a 3D LUT.
Either I am making this more difficult than it is or it is more complicated than meets the eye. I just want to un LogC the footage like I do in Resolve when I use Resolve's Arri LogC to Rec 709 Output LUT. That isn't hard in Resolve but I have never had to start making tweaks for it to have satisfactory results.
---In avid-l2@yahoogroups.com, <bogdan_grigorescu@...> wrote :why not use ARRI's own LUT generator?BG
From: "John Moore bigfish@... [Avid-L2]" <Avid-L2@yahoogroups.com>
To: yahoogroups <avid-l2@yahoogroups.com>
Sent: Wednesday, April 13, 2016 7:25 PM
Subject: [Avid-L2] 3D Hard LUT vs. Soft LUT What The LUT?
Attempting to bring the Arri LogC to Rec 709 LUT from Resolve into Avid I found Avid would not import the .dat file in the Resolve LUT folder. I went to the look up table setting page in Resolve and generated a LUT based on the Arri LogC to Rec 709. This created a .cube LUT that Avid would import. The automatically generated name said "soft" in the title. I had not check the scale to levels box which I"ve read leads to a hard clip at the upper and lower values which 940 and 64 for 10 bit. I didn't know to address these settings when generating the LUT. If I left the settings at 0% softness on the upper and lower clips isn't that in essence a hard clip. Things seem to be looking good but this was on a system without a scope so I don't have a real way to check things.Is there a way in Resolve to generate a LUT based on it's internal Arri LogC to Rec 709 that isn't soft?John Moore Barking Trout Productions Studio City, CA bigfish@...
Posted by: bigfish@pacbell.net
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