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Version 9.1.1.013 Not Accurately Scaling 3840x2160 to 1920x1080

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Chris Martin
Version 9.1.1.013 Not Accurately Scaling 3840x2160 to 1920x1080
on Mar 11, 2013 at 6:14:32 pm

We recently upgraded to v 9.1.1.013 and just got burned with Resolve not scaling R3D's accurately from 3840x2160 down to 1920x1080.

Project was set up correctly to do so, (timeline resolution @ 1920x1080 and image scaling set to "scale entire image to fit." But Resolve is scaling down to 1920x1080 with a slight blanking crop as well as a ever so slight scale difference (we examined in a Flame for reference). This is the case for both DPX and Quicktime exports.

When we set timeline res to 3840x2160 and export DPX frames at this source resolution everything is accurately 1:1 with no blanking crops. We also took DPX frames @ 3840x2160 and rendered those out from Resolve at 1920x1080 and the same scaling problem was incurred. This seems to rule out the scaling problem being specific to R3D files.

Screen grabs attached below to see the offset. This is pretty straight forward math going from 3840x2160 to 1920x1080. This experience has us a bit untrusting of this version of Resolve's ability scale down correctly, so as it stands we're having to render out at source resolution and do our cooking down elsewhere, which is putting way more data on our server than we want or need.





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Eric Rosen
Re: Version 9.1.1.013 Not Accurately Scaling 3840x2160 to 1920x1080
on Mar 11, 2013 at 6:36:29 pm

What worked for me was going into Project Settings, Image Scaling, Anti-Alias Edges. I believe the default is auto, turn it off. Not sure what you lose by turning it off but it seems to fix the issue. Mark Thompson from Blackmagic passed along that info to me, I also found this post below on BMD forum.

http://forum.blackmagicdesign.com/viewtopic.php?f=3&t=2544

Eric Rosen
Lightpress Inc.
http://www.lightpress.tv
http://www.colormatters.tv
p. 206.552.9806


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MichaelMaier
Re: Version 9.1.1.013 Not Accurately Scaling 3840x2160 to 1920x1080
on Mar 11, 2013 at 8:17:11 pm

9.1. was crashing when I upgraded and I couldn't figure why. So I went back to 9.0.4



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Peter Chamberlain
Re: Version 9.1.1.013 Not Accurately Scaling 3840x2160 to 1920x1080
on Mar 12, 2013 at 12:58:13 am

You should reconsider the current release version. 9.1.1.
There are a number of improvements compared to 9.0.4
Peter


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MichaelMaier
Re: Version 9.1.1.013 Not Accurately Scaling 3840x2160 to 1920x1080
on Mar 12, 2013 at 1:14:06 am

I would. But no matter what I did I couldn't get it to run. I installed it, uninstalled it, installed it again, it wouldn't run. Tried starting it as administrator but still wouldn't work. It would work the first time I started it after installing, but then as soon as I added a new drive and re-started Resolve to update the drive library it would not longer run. It would crash after I typed in my log-in password. I have the latest BM drivers and all the system requirements match.
But 9.0.4 has no problems, so I just lost my patience.



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Chris Martin
Re: Version 9.1.1.013 Not Accurately Scaling 3840x2160 to 1920x1080
on Mar 12, 2013 at 5:05:03 am

Thanks Eric this did solve the problem. Very odd bug indeed. I update my default config so that anti-alias set to off instead of auto to avoid future situations like this.


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Nick Hasson
Re: Version 9.1.1.013 Not Accurately Scaling 3840x2160 to 1920x1080
on Mar 13, 2013 at 3:19:09 pm

hey chris,

I always turn off that too. It has burned me in the past on vfx pulls.

Nick Hasson
Smoke/RESOLVE
http://www.niceedits.com


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