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Ultrascope - Resolve using legal range

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Laco Gaal
Ultrascope - Resolve using legal range
on Apr 22, 2013 at 8:32:15 am

I have a Davini Resolve, with a Decklink card set to Video Levels.
The SDI output is monitored with an Ultrascope, which is set to show errors according to EBU-R 103 standards.

When grading in Resolve I wasn't able to generate error messages like "Luma Under" or "Luma Over". Also if I render out a DPX sequence I won't see any problem.
But if I render out a Prores (video level) and import it to Adobe Premiere, Ultrascope will show "Luma Under -4 IRE" or "Luma Over 104 IRE" error messages.

Now here comes the strange part. If I import this Prores back to Resolve, it won't show any error messages.
Also if I import the DPX sequence to Premiere, it won't show the errors. But as soon as I render something compressed out - like prores, or MXF - it will show these errors.

Am I doing something wrong?
If not, how can I be sure that I won't export luma under, and luma over values from Premiere?

thanks.


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Sascha Haber
Re: Ultrascope - Resolve using legal range
on Apr 23, 2013 at 5:54:23 am

To ma that sounds like you have a configuration error.
Or even more likely, two of them and together they work if you make a render mistake.
Can we ask you to render 5 sec of ProRes and a corresponding DPX frame, export the project setting and zip it all and upload it to YouSendit ?
i will have a look and investigate further then.

A slice of color...

Resolve 9.1.1 OSX 10.8.2

Colorist / Aerial footage producer
http://vimeo.com/saschahaber


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Laco Gaal
Re: Ultrascope - Resolve using legal range
on Apr 23, 2013 at 6:31:43 am

Thanks Sascha. Could I contact you through email?


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Laco Gaal
Re: Ultrascope - Resolve using legal range
on Apr 23, 2013 at 7:28:27 am

Thanks Sascha, currently I'm not allowed to give this one out, but I did the test with another video, same thing found. (Only the original video was much more contrasty, throwing Luma Over issues too)

So:
- Davinci Resolve video output is set up like this: http://d.pr/i/VrzG
- monitoring the Davinci output looks like this on the Ultrascope: http://d.pr/i/oPB7 (Error log started, no errors)
I exported a video level Prores422 mov, and a full range DPX, and brought them into Premiere (tested in Smoke, and Avid too...)

- Prores looks like this on the internal waveform in Premiere: http://d.pr/i/AF8w and looks like this monitored with Ultrascope http://d.pr/i/XTdL (errors found)
- DPX looks like thin on the internal waveform in Premiere: http://d.pr/i/WN5M and looks like this monitored with Ultrascope http://d.pr/i/6Kxs (no errors)

Now here comes the strange part. If I export an MXF from the DPX - which was flawless - it looks like this on the internal: http://d.pr/i/H3UH and on Ultrascope: http://d.pr/i/K71h (errors again)
If I export out a Prores from the DPX, the same thing happen - played back in Premiere, Avid, or Blackmagic Media Express.

If I bring back the exported MXF to Resolve, Ultrascope finds no errors at all.
Here are all the files: http://we.tl/1frLjykUZq

This can be a Premiere issue, but then what kind of finishing tool should I use?

thanks


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